腾讯云Ubuntu二进制搭建高可用(k8s)Kubernetes v1.24.3集群
随着Kubernetes版本更新迭代，在1.24开始，已经将容器运行时修改为containerd，周末闲来无事使用腾讯云的ECS+负载均衡实现对apiserver的代理。同时使用Ubuntu二进制来安装k8s 1.24.3
文章目录
2022年08月02日更新相关错误
环境介绍
购买服务器
购买负载均衡
| k8s-01 | 10.206.16.2 | master节点 | containerd、kube-apiserver、kube-controller-manager、kube-scheduler、etcd、kubelet、kube-proxy | 2c4g |
| k8s-02 | 10.206.16.5 | master节点 | containerd、kube-apiserver、kube-controller-manager、kube-scheduler、etcd、kubelet、kube-proxy | 2c4g |
| k8s-03 | 10.206.16.3 | master节点 | containerd、kube-apiserver、kube-controller-manager、kube-scheduler、etcd、kubelet、kube-proxy | 2c4g |
VIP为腾讯云负载均衡服务器
初始化环境
初始化步骤所有服务器执行
#配置apt源 sed -i 's/archive.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list #关闭防火墙 systemctl disable --now ufw #关闭交换分区,云服务器没有交换分区，所以我这里不执行了 sed -ri 's/.*swap.*/#&/' /etc/fstab swapoff -a && sysctl -w vm.swappiness=0 cat /etc/fstab # /dev/mapper/centos-swap swap swap defaults 0 0
#打开终端输入以下命令安装ntpdate工具。 apt-get install ntpdate #再输入命令设置系统时间与网络时间同步。 ntpdate cn.pool.ntp.org #最后输入命令将时间更新到硬件上即可。 hwclock --systohc
ulimit -SHn 65535 cat >> /etc/security/limits.conf <<EOF * soft nofile 655360 * hard nofile 131072 * soft nproc 655350 * hard nproc 655350 * seft memlock unlimited * hard memlock unlimitedd EOF
cat >> /etc/hosts <<EOF 10.206.16.2 k8s-01 10.206.16.5 k8s-02 10.206.16.3 k8s-03 10.206.16.14 apiserver.i4t.com EOF
免密只需要在k8s-01节点上执行即可
apt install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="k8s-01 k8s-02 k8s-03
export SSHPASS=Haomima123..
for HOST in $IP;do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done
#自行开启SSH root登陆
apt install ipvsadm ipset sysstat conntrack -y cat >> /etc/modules-load.d/ipvs.conf <<EOF ip_vs ip_vs_rr ip_vs_wrr ip_vs_sh nf_conntrack ip_tables ip_set xt_set ipt_set ipt_rpfilter ipt_REJECT ipip EOF systemctl restart systemd-modules-load.service lsmod | grep -e ip_vs -e nf_conntrack ip_vs_sh 16384 0 ip_vs_wrr 16384 0 ip_vs_rr 16384 0 ip_vs 155648 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr nf_conntrack 139264 1 ip_vs nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs nf_defrag_ipv4 16384 1 nf_conntrack libcrc32c 16384 4 nf_conntrack,btrfs,raid456,ip_vs
cat <<EOF > /etc/sysctl.d/k8s.conf net.ipv4.ip_forward = 1 net.bridge.bridge-nf-call-iptables = 1 fs.may_detach_mounts = 1 vm.overcommit_memory=1 vm.panic_on_oom=0 fs.inotify.max_user_watches=89100 fs.file-max=52706963 fs.nr_open=52706963 net.netfilter.nf_conntrack_max=2310720 net.ipv4.tcp_keepalive_time = 600 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.tcp_keepalive_intvl =15 net.ipv4.tcp_max_tw_buckets = 36000 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_max_orphans = 327680 net.ipv4.tcp_orphan_retries = 3 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_max_syn_backlog = 16384 net.ipv4.ip_conntrack_max = 65536 net.ipv4.tcp_max_syn_backlog = 16384 net.ipv4.tcp_timestamps = 0 net.core.somaxconn = 16384 net.ipv6.conf.all.disable_ipv6 = 0 net.ipv6.conf.default.disable_ipv6 = 0 net.ipv6.conf.lo.disable_ipv6 = 0 net.ipv6.conf.all.forwarding = 0 EOF sysctl --system
所有节点安装Containerd
wget https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz #abcdocker代理节点 wget https://d.frps.cn/file/kubernetes/install/1.24.3/cni-plugins-linux-amd64-v1.1.1.tgz #创建cni插件所需目录 mkdir -p /etc/cni/net.d /opt/cni/bin #解压cni二进制包 tar xf cni-plugins-linux-amd64-v1.1.1.tgz -C /opt/cni/bin/ wget https://github.com/containerd/containerd/releases/download/v1.6.4/cri-containerd-cni-1.6.4-linux-amd64.tar.gz #abcdocker代理节点 wget https://d.frps.cn/file/kubernetes/install/1.24.3/cri-containerd-cni-1.6.4-linux-amd64.tar.gz #解压 tar -C / -xzf cri-containerd-cni-1.6.4-linux-amd64.tar.gz #创建服务启动文件 cat > /etc/systemd/system/containerd.service <<EOF [Unit] Description=containerd container runtime Documentation=https://containerd.io After=network.target local-fs.target [Service] ExecStartPre=-/sbin/modprobe overlay ExecStart=/usr/local/bin/containerd Type=notify Delegate=yes KillMode=process Restart=always RestartSec=5 LimitNPROC=infinity LimitCORE=infinity LimitNOFILE=infinity TasksMax=infinity OOMScoreAdjust=-999 [Install] WantedBy=multi-user.target EOF
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf overlay br_netfilter EOF
systemctl restart systemd-modules-load.service
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 net.bridge.bridge-nf-call-ip6tables = 1 EOF # 加载内核 sysctl --system
#创建配置文件 mkdir -p /etc/containerd containerd config default | tee /etc/containerd/config.toml #修改Containerd的配置文件 sed -i "s#SystemdCgroup = false#SystemdCgroup = true#g" /etc/containerd/config.toml cat /etc/containerd/config.toml | grep SystemdCgroup sed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/abcdocker#g" /etc/containerd/config.toml cat /etc/containerd/config.toml | grep sandbox_image
请手动删除标记的67行systemd_cgroup = false，否则kubelet启动会提示下面的错误https://i4t.com/5633.html
systemctl daemon-reload systemctl enable --now containerd
所有节点都可以正常使用
root@VM-16-2-ubuntu:~# ctr version Client: Version: v1.6.4 Revision: 212e8b6fa2f44b9c21b2798135fc6fb7c53efc16 Go version: go1.17.9 Server: Version: v1.6.4 Revision: 212e8b6fa2f44b9c21b2798135fc6fb7c53efc16 UUID: f3171aee-67b0-4e01-871b-2e93674af2ad
Kubernetes Master安装
二进制文件下载
k8s-01节点操作即可
下载安装包
wget https://dl.k8s.io/v1.24.3/kubernetes-server-linux-amd64.tar.gz wget https://github.com/etcd-io/etcd/releases/download/v3.5.4/etcd-v3.5.4-linux-amd64.tar.gz #abcdocker代理下载 wget https://d.frps.cn/file/kubernetes/install/1.24.3/kubernetes-server-linux-amd64.tar.gz wget https://d.frps.cn/file/kubernetes/install/1.24.3/etcd-v3.5.4-linux-amd64.tar.gz
解压k8s安装文件
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
etcd安装文件
tar -xf etcd-v3.5.4-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.5.4-linux-amd64/etcd{,ctl}
检查/usr/local/bin下内容
ls /usr/local/bin/ etcd etcdctl kube-apiserver kube-controller-manager kubectl kubelet kube-proxy kube-scheduler
查看kubelet和etcdctl是否获取正常
[root@k8s-01 ~]# kubelet --version Kubernetes v1.24.1 [root@k8s-01 ~]# etcdctl version etcdctl version: 3.5.4 API version: 3.5 [root@k8s-01 ~]#
将刚刚解压的二进制文件拷贝到其它服务器上
for i in k8s-02 k8s-03;do
scp /usr/local/bin/kube* root@$i:/usr/local/bin/
scp /usr/local/bin/{etcd,etcdctl} root@$i:/usr/local/bin/
done
下载配置cfssl证书
k8s-01上操作即可
下载配置cfssl证书工具
wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64" -O /usr/local/bin/cfssl wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64" -O /usr/local/bin/cfssljson chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
创建证书配置文件
mkdir pki
cd pki
cat > admin-csr.json << EOF
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
cat > etcd-ca-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > front-proxy-ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"ca": {
"expiry": "876000h"
}
}
EOF
cat > kubelet-csr.json << EOF
{
"CN": "system:node:$NODE",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "system:nodes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > apiserver-csr.json << EOF
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cat > etcd-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
cat > front-proxy-client-csr.json << EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-proxy",
"OU": "Kubernetes-manual"
}
]
}
EOF
cat > scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
cd ..
mkdir bootstrap
cd bootstrap
cat > bootstrap.secret.yaml << EOF
apiVersion: v1
kind: Secret
metadata:
name: bootstrap-token-c8ad9c
namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
description: "The default bootstrap token generated by 'kubelet '."
token-id: c8ad9c
token-secret: 2e4d610cf3e7426e
usage-bootstrap-authentication: "true"
usage-bootstrap-signing: "true"
auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubelet-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-certificate-rotation
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:kube-apiserver-to-kubelet
rules:
- apiGroups:
- ""
resources:
- nodes/proxy
- nodes/stats
- nodes/log
- nodes/spec
- nodes/metrics
verbs:
- "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:kube-apiserver
namespace: ""
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:kube-apiserver-to-kubelet
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: kube-apiserver
EOF
ETCD证书
创建证书文件
for i in k8s-01 k8s-02 k8s-03;do ssh root@$i mkdir /etc/etcd/ssl -p done
下方操作均在k8s-01节点
生成etcd证书和etcd证书的key
cd pki cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca cfssl gencert -ca=/etc/etcd/ssl/etcd-ca.pem -ca-key=/etc/etcd/ssl/etcd-ca-key.pem -config=ca-config.json -hostname=k8s-01,k8s-02,k8s-03,10.206.16.2,10.206.16.5,10.206.16.3 -profile=kubernetes etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
将证书复制到其它节点
for i in k8s-02 k8s-03;do
ssh $i "mkdir -p /etc/etcd/ssl"
scp /etc/etcd/ssl/* $i:/etc/etcd/ssl/
done
k8s集群证书
k8s-01节点操作
所有证书存放目录
mkdir -p /etc/kubernetes/pki
生成一个根证书
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
10.96.0.1是service网段的第一个地址
apiserver.frps.cn高可用vip地址
10.206.16.14 高可用ip
cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=10.96.0.1,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,k8s-01,k8s-02,k8s-03,k8s-04,k8s-05,apiserver.frps.cn,10.206.16.2,10.206.16.3,10.206.16.5 -profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
生成apiserver
cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca cfssl gencert -ca=/etc/kubernetes/pki/front-proxy-ca.pem -ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem -config=ca-config.json -profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
生成controller-manage证书
cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 设置一个集群项
kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://apiserver.frps.cn:8443
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes
--cluster=kubernetes
--user=system:kube-controller-manager
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个用户项
kubectl config set-credentials system:kube-controller-manager
--client-certificate=/etc/kubernetes/pki/controller-manager.pem
--client-key=/etc/kubernetes/pki/controller-manager-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://apiserver.frps.cn:8443
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler
--client-certificate=/etc/kubernetes/pki/scheduler.pem
--client-key=/etc/kubernetes/pki/scheduler-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-context system:kube-scheduler@kubernetes
--cluster=kubernetes
--user=system:kube-scheduler
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
cfssl gencert
-ca=/etc/kubernetes/pki/ca.pem
-ca-key=/etc/kubernetes/pki/ca-key.pem
-config=ca-config.json
-profile=kubernetes
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
kubectl config set-cluster kubernetes
--certificate-authority=/etc/kubernetes/pki/ca.pem
--embed-certs=true
--server=https://apiserver.frps.cn:8443
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-credentials kubernetes-admin
--client-certificate=/etc/kubernetes/pki/admin.pem
--client-key=/etc/kubernetes/pki/admin-key.pem
--embed-certs=true
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-context kubernetes-admin@kubernetes
--cluster=kubernetes
--user=kubernetes-admin
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
生成kube-proxy证书
cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://apiserver.frps.cn:8443 --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig kubectl config set-credentials kube-proxy --client-certificate=/etc/kubernetes/pki/kube-proxy.pem --client-key=/etc/kubernetes/pki/kube-proxy-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig kubectl config set-context kube-proxy@kubernetes --cluster=kubernetes --user=kube-proxy --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig kubectl config use-context kube-proxy@kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
创建ServiceAccount Key
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048 openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
其他节点创建目录
for i in k8s-02 k8s-03;do
ssh $i "mkdir /etc/kubernetes/pki/ -p"
scp -r /etc/kubernetes/pki $i:/etc/kubernetes/
done
查看证书
ls /etc/kubernetes/pki/ admin.csr ca.csr front-proxy-ca.csr kube-proxy.csr scheduler-key.pem admin-key.pem ca-key.pem front-proxy-ca-key.pem kube-proxy-key.pem scheduler.pem admin.pem ca.pem front-proxy-ca.pem kube-proxy.pem apiserver.csr controller-manager.csr front-proxy-client.csr sa.key apiserver-key.pem controller-manager-key.pem front-proxy-client-key.pem sa.pub apiserver.pem controller-manager.pem front-proxy-client.pem scheduler.csr # 一共26个就对了 ls /etc/kubernetes/pki/ |wc -l 26
配置ETCD
k8s-01配置文件，请根据需求修改
# 如果要用IPv6那么把IPv4地址修改为IPv6即可 cat > /etc/etcd/etcd.config.yml << EOF name: 'k8s-01' data-dir: /var/lib/etcd wal-dir: /var/lib/etcd/wal snapshot-count: 5000 heartbeat-interval: 100 election-timeout: 1000 quota-backend-bytes: 0 listen-peer-urls: 'https://10.206.16.2:2380' listen-client-urls: 'https://10.206.16.2:2379,http://127.0.0.1:2379' max-snapshots: 3 max-wals: 5 cors: initial-advertise-peer-urls: 'https://10.206.16.2:2380' advertise-client-urls: 'https://10.206.16.2:2379' discovery: discovery-fallback: 'proxy' discovery-proxy: discovery-srv: initial-cluster: 'k8s-01=https://10.206.16.2:2380,k8s-02=https://10.206.16.5:2380,k8s-03=https://10.206.16.3:2380' initial-cluster-token: 'etcd-k8s-cluster' initial-cluster-state: 'new' strict-reconfig-check: false enable-v2: true enable-pprof: true proxy: 'off' proxy-failure-wait: 5000 proxy-refresh-interval: 30000 proxy-dial-timeout: 1000 proxy-write-timeout: 5000 proxy-read-timeout: 0 client-transport-security: cert-file: '/etc/kubernetes/pki/etcd/etcd.pem' key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem' client-cert-auth: true trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem' auto-tls: true peer-transport-security: cert-file: '/etc/kubernetes/pki/etcd/etcd.pem' key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem' peer-client-cert-auth: true trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem' auto-tls: true debug: false log-package-levels: log-outputs: [default] force-new-cluster: false EOF
k8s-02配置文件，请根据需求修改
# 如果要用IPv6那么把IPv4地址修改为IPv6即可 cat > /etc/etcd/etcd.config.yml << EOF name: 'k8s-02' data-dir: /var/lib/etcd wal-dir: /var/lib/etcd/wal snapshot-count: 5000 heartbeat-interval: 100 election-timeout: 1000 quota-backend-bytes: 0 listen-peer-urls: 'https://10.206.16.5:2380' listen-client-urls: 'https://10.206.16.5:2379,http://127.0.0.1:2379' max-snapshots: 3 max-wals: 5 cors: initial-advertise-peer-urls: 'https://10.206.16.5:2380' advertise-client-urls: 'https://10.206.16.5:2379' discovery: discovery-fallback: 'proxy' discovery-proxy: discovery-srv: initial-cluster: 'k8s-01=https://10.206.16.2:2380,k8s-02=https://10.206.16.5:2380,k8s-03=https://10.206.16.3:2380' initial-cluster-token: 'etcd-k8s-cluster' initial-cluster-state: 'new' strict-reconfig-check: false enable-v2: true enable-pprof: true proxy: 'off' proxy-failure-wait: 5000 proxy-refresh-interval: 30000 proxy-dial-timeout: 1000 proxy-write-timeout: 5000 proxy-read-timeout: 0 client-transport-security: cert-file: '/etc/kubernetes/pki/etcd/etcd.pem' key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem' client-cert-auth: true trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem' auto-tls: true peer-transport-security: cert-file: '/etc/kubernetes/pki/etcd/etcd.pem' key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem' peer-client-cert-auth: true trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem' auto-tls: true debug: false log-package-levels: log-outputs: [default] force-new-cluster: false EOF
k8s-03配置文件，请根据需求修改
# 如果要用IPv6那么把IPv4地址修改为IPv6即可 cat > /etc/etcd/etcd.config.yml << EOF name: 'k8s-03' data-dir: /var/lib/etcd wal-dir: /var/lib/etcd/wal snapshot-count: 5000 heartbeat-interval: 100 election-timeout: 1000 quota-backend-bytes: 0 listen-peer-urls: 'https://10.206.16.3:2380' listen-client-urls: 'https://10.206.16.3:2379,http://127.0.0.1:2379' max-snapshots: 3 max-wals: 5 cors: initial-advertise-peer-urls: 'https://10.206.16.3:2380' advertise-client-urls: 'https://10.206.16.3:2379' discovery: discovery-fallback: 'proxy' discovery-proxy: discovery-srv: initial-cluster: 'k8s-01=https://10.206.16.2:2380,k8s-02=https://10.206.16.5:2380,k8s-03=https://10.206.16.3:2380' initial-cluster-token: 'etcd-k8s-cluster' initial-cluster-state: 'new' strict-reconfig-check: false enable-v2: true enable-pprof: true proxy: 'off' proxy-failure-wait: 5000 proxy-refresh-interval: 30000 proxy-dial-timeout: 1000 proxy-write-timeout: 5000 proxy-read-timeout: 0 client-transport-security: cert-file: '/etc/kubernetes/pki/etcd/etcd.pem' key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem' client-cert-auth: true trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem' auto-tls: true peer-transport-security: cert-file: '/etc/kubernetes/pki/etcd/etcd.pem' key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem' peer-client-cert-auth: true trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem' auto-tls: true debug: false log-package-levels: log-outputs: [default] force-new-cluster: false EOF
创建etcd启动服务（需要在所有master节点操作）
cat > /usr/lib/systemd/system/etcd.service << EOF [Unit] Description=Etcd Service Documentation=https://coreos.com/etcd/docs/latest/ After=network.target [Service] Type=notify ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml Restart=on-failure RestartSec=10 LimitNOFILE=65536 [Install] WantedBy=multi-user.target Alias=etcd3.service EOF
拷贝ETCD证书
mkdir /etc/kubernetes/pki/etcd ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/ systemctl daemon-reload systemctl enable --now etcd
查看etcd状态
# 如果要用IPv6那么把IPv4地址修改为IPv6即可 export ETCDCTL_API=3 etcdctl --endpoints="k8s-01:2379,k8s-02:2379,k8s-03:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table +-------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +-------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | k8s-01:2379 | 7f38447ea06fe963 | 3.5.4 | 20 kB | true | false | 2 | 9 | 9 | | | k8s-02:2379 | 7074c298e1728385 | 3.5.4 | 20 kB | false | false | 2 | 9 | 9 | | | k8s-03:2379 | ca5c37bfc23da20f | 3.5.4 | 20 kB | false | false | 2 | 9 | 9 | | +-------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
配置腾讯云负载均衡
负载均衡是通信集群信息的节点，所以我这里将负载均衡IP添加了一个hosts解析。解析域名为apiserver.frps.cn
配置监听器
绑定后端节点
最后展示
在k8s-01节点上执行for循环，将apiserver IP解析为apiserver.frps.cn域名
for i in k8s-01 k8s-02 k8s-03;do
ssh $i "echo "10.206.16.14 apiserver.frps.cn" >>/etc/hosts"
done
ApiServer 配置
创建apiserver服务启动文件
k8s-01节点
需要在每台节点自行修改对应的信息
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver
--v=2
--logtostderr=true
--allow-privileged=true
--bind-address=0.0.0.0
--secure-port=6443
--advertise-address=10.206.16.3
--service-cluster-ip-range=10.96.0.0/12,fd00::/108
--feature-gates=IPv6DualStack=true
--service-node-port-range=30000-32767
--etcd-servers=https://k8s-01:2379,https://k8s-02:2379,https://k8s-03:2379
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem
--etcd-certfile=/etc/etcd/ssl/etcd.pem
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem
--client-ca-file=/etc/kubernetes/pki/ca.pem
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem
--service-account-key-file=/etc/kubernetes/pki/sa.pub
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key
--service-account-issuer=https://kubernetes.default.svc.cluster.local
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota
--authorization-mode=Node,RBAC
--enable-bootstrap-token-auth=true
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem
--requestheader-allowed-names=aggregator
--requestheader-group-headers=X-Remote-Group
--requestheader-extra-headers-prefix=X-Remote-Extra-
--requestheader-username-headers=X-Remote-User
--enable-aggregator-routing=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
k8s-02节点
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver
--v=2
--logtostderr=true
--allow-privileged=true
--bind-address=0.0.0.0
--secure-port=6443
--advertise-address=10.206.16.5
--service-cluster-ip-range=10.96.0.0/12,fd00::/108
--feature-gates=IPv6DualStack=true
--service-node-port-range=30000-32767
--etcd-servers=https://k8s-03:2379,https://k8s-02:2379,https://k8s-03:2379
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem
--etcd-certfile=/etc/etcd/ssl/etcd.pem
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem
--client-ca-file=/etc/kubernetes/pki/ca.pem
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem
--service-account-key-file=/etc/kubernetes/pki/sa.pub
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key
--service-account-issuer=https://kubernetes.default.svc.cluster.local
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota
--authorization-mode=Node,RBAC
--enable-bootstrap-token-auth=true
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem
--requestheader-allowed-names=aggregator
--requestheader-group-headers=X-Remote-Group
--requestheader-extra-headers-prefix=X-Remote-Extra-
--requestheader-username-headers=X-Remote-User
--enable-aggregator-routing=true
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
k8s-03节点
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver
--v=2
--logtostderr=true
--allow-privileged=true
--bind-address=0.0.0.0
--secure-port=6443
--advertise-address=10.206.16.2
--service-cluster-ip-range=10.96.0.0/12
--feature-gates=IPv6DualStack=true
--service-node-port-range=30000-32767
--etcd-servers=https://k8s-01:2379,https://k8s-02:2379,https://k8s-03:2379
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem
--etcd-certfile=/etc/etcd/ssl/etcd.pem
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem
--client-ca-file=/etc/kubernetes/pki/ca.pem
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem
--service-account-key-file=/etc/kubernetes/pki/sa.pub
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key
--service-account-issuer=https://kubernetes.default.svc.cluster.local
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota
--authorization-mode=Node,RBAC
--enable-bootstrap-token-auth=true
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem
--requestheader-allowed-names=aggregator
--requestheader-group-headers=X-Remote-Group
--requestheader-extra-headers-prefix=X-Remote-Extra-
--requestheader-username-headers=X-Remote-User
--enable-aggregator-routing=true
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
启动apiserver（所有master节点）
for i in k8s-01 k8s-02 k8s-03;do
ssh $i "systemctl daemon-reload && systemctl enable --now kube-apiserver"
echo "$i"
sleep 5
ssh $i "systemctl status kube-apiserver"
done
启动完成后，我们到腾讯云SLB就可以看到后端健康已经正常
Controller-Manage
只在k8s-01操作，然后拷贝到其它节点
172.16.0.0/12为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager
--v=2
--logtostderr=true
--bind-address=127.0.0.1
--root-ca-file=/etc/kubernetes/pki/ca.pem
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem
--service-account-private-key-file=/etc/kubernetes/pki/sa.key
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
--leader-elect=true
--use-service-account-credentials=true
--node-monitor-grace-period=40s
--node-monitor-period=5s
--pod-eviction-timeout=2m0s
--controllers=*,bootstrapsigner,tokencleaner
--allocate-node-cidrs=true
--feature-gates=IPv6DualStack=true
--service-cluster-ip-range=10.96.0.0/12,fd00::/108
--cluster-cidr=172.16.0.0/12,fc00::/48
--node-cidr-mask-size-ipv4=24
--node-cidr-mask-size-ipv6=64
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
配置文件拷贝到其它节点
for i in k8s-02 k8s-03;do
scp /usr/lib/systemd/system/kube-controller-manager.service $i:/usr/lib/systemd/system/
scp /etc/kubernetes/controller-manager.kubeconfig $i:/etc/kubernetes/
done
启动所有节点服务
for i in k8s-01 k8s-02 k8s-03;do
ssh $i "systemctl daemon-reload && systemctl enable --now kube-controller-manager && systemctl status kube-controller-manager"
done
Scheduler
只在k8s-01操作，然后拷贝到其它节点
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler
--v=2
--logtostderr=true
--bind-address=127.0.0.1
--leader-elect=true
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
配置文件拷贝到其它节点
for i in k8s-02 k8s-03;do
scp /usr/lib/systemd/system/kube-scheduler.service $i:/usr/lib/systemd/system/
scp /etc/kubernetes/scheduler.kubeconfig $i:/etc/kubernetes/
done
启动所有节点服务
for i in k8s-01 k8s-02 k8s-03;do
ssh $i "systemctl daemon-reload && systemctl enable --now kube-scheduler && systemctl status kube-scheduler"
done
上下文配置
只在k8s-01操作
cd /root/bootstrap kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://apiserver.frps.cn:8443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig kubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig kubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig kubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig # token的位置在bootstrap.secret.yaml，如果修改的话到这个文件修改 mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
查看集群状态
root@VM-16-2-ubuntu:~/bootstrap# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-2 Healthy {"health":"true","reason":""}
etcd-0 Healthy {"health":"true","reason":""}
etcd-1 Healthy {"health":"true","reason":""}
# 切记执行，别忘记！！！
kubectl create -f bootstrap.secret.yaml
Kubelet
只在k8s-01操作，然后拷贝到其它节点
创建 kubelet启动文件
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig
--config=/etc/kubernetes/kubelet-conf.yml
--container-runtime=remote
--runtime-request-timeout=15m
--container-runtime-endpoint=unix:///run/containerd/containerd.sock
--cgroup-driver=systemd
--node-labels=node.kubernetes.io/node=''
--feature-gates=IPv6DualStack=true
[Install]
WantedBy=multi-user.target
EOF
提示: Centos需要将--node-labels=node.kubernetes.io/node=后面的单引号删除
创建kubelet配置文件
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF
拷贝证书到其它节点
for i in k8s-01 k8s-02 k8s-03;do ssh $i "mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/kubernetes/manifests/" scp /etc/kubernetes/kubelet-conf.yml $i:/etc/kubernetes/ scp /usr/lib/systemd/system/kubelet.service $i:/usr/lib/systemd/system/ scp /etc/kubernetes/bootstrap-kubelet.kubeconfig $i:/etc/kubernetes/ done
启动服务
所有节点
for i in k8s-01 k8s-02 k8s-03;do
ssh $i "systemctl daemon-reload"
ssh $i "systemctl enable --now kubelet"
sleep 3
ssh $i "systemctl status kubelet"
done
ssh $i "systemctl restart kubelet"
查看集群
root@VM-16-2-ubuntu:~# kubectl get node NAME STATUS ROLES AGE VERSION vm-16-2-ubuntu Ready <none> 15m v1.24.3 vm-16-3-ubuntu Ready <none> 15s v1.24.3 vm-16-5-ubuntu Ready <none> 20s v1.24.3
Kube-Proxy
创建systemd启动文件
cat > /usr/lib/systemd/system/kube-proxy.service << EOF [Unit] Description=Kubernetes Kube Proxy Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/usr/local/bin/kube-proxy --config=/etc/kubernetes/kube-proxy.yaml --v=2 Restart=always RestartSec=10s [Install] WantedBy=multi-user.target EOF
创建kube-proxy配置文件
cat > /etc/kubernetes/kube-proxy.yaml << EOF apiVersion: kubeproxy.config.k8s.io/v1alpha1 bindAddress: 0.0.0.0 clientConnection: acceptContentTypes: "" burst: 10 contentType: application/vnd.kubernetes.protobuf kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig qps: 5 clusterCIDR: 172.16.0.0/12,fc00::/48 configSyncPeriod: 15m0s conntrack: max: null maxPerCore: 32768 min: 131072 tcpCloseWaitTimeout: 1h0m0s tcpEstablishedTimeout: 24h0m0s enableProfiling: false healthzBindAddress: 0.0.0.0:10256 hostnameOverride: "" iptables: masqueradeAll: false masqueradeBit: 14 minSyncPeriod: 0s syncPeriod: 30s ipvs: masqueradeAll: true minSyncPeriod: 5s scheduler: "rr" syncPeriod: 30s kind: KubeProxyConfiguration metricsBindAddress: 127.0.0.1:10249 mode: "ipvs" nodePortAddresses: null oomScoreAdj: -999 portRange: "" udpIdleTimeout: 250ms EOF
前面已经生成了kube-proxy.kubeconfig文件，接下来我们拷贝到其它master节点
for i in k8s-02 k8s-03;do
scp /etc/kubernetes/kube-proxy.kubeconfig $i:/etc/kubernetes/
scp /etc/kubernetes/kube-proxy.yaml $i:/etc/kubernetes/
scp /usr/lib/systemd/system/kube-proxy.service $i:/usr/lib/systemd/system/
done
批量启动服务
for i in k8s-01 k8s-02 k8s-03;do
ssh $i "systemctl daemon-reload"
ssh $i "systemctl restart kube-proxy"
ssh $i "systemctl enable --now kube-proxy"
done
检查服务状态
for i in k8s-01 k8s-02 k8s-03;do
echo "$i"
sleep 2
ssh $i "systemctl status kube-proxy"
done
Calico 安装
Calico网段
wget http://down.i4t.com/k8s1.24/calico.yaml kubectl apply -f calico.yaml
检查calico
root@VM-16-2-ubuntu:~# kubectl get pod -n kube-system NAME READY STATUS RESTARTS AGE calico-kube-controllers-56cdb7c587-7ckj6 1/1 Running 0 10m calico-node-6xlkh 1/1 Running 0 10m calico-node-n66nr 1/1 Running 0 10m calico-node-t27pp 1/1 Running 0 10m calico-typha-6775694657-4m28f 1/1 Running 0 10m coredns-6d86b45487-fpvd6 1/1 Running 0 35m metrics-server-6d6549d5d4-kxkxn 1/1 Running 1 (37m ago) 72m
CoreDNS 安装
mkdir /root/coredns && cd /root/coredns
cat > coredns.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
- apiGroups:
- discovery.k8s.io
resources:
- endpointslices
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. Default is 1.
# 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
nodeSelector:
kubernetes.io/os: linux
affinity:
podAntiAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 100
podAffinityTerm:
labelSelector:
matchExpressions:
- key: k8s-app
operator: In
values: ["kube-dns"]
topologyKey: kubernetes.io/hostname
containers:
- name: coredns
image: registry.cn-beijing.aliyuncs.com/abcdocker/coredns:1.8.6
imagePullPolicy: IfNotPresent
resources:
limits:
memory: 170Mi
requests:
cpu: 100m
memory: 70Mi
args: [ "-conf", "/etc/coredns/Corefile" ]
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
readOnly: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
readinessProbe:
httpGet:
path: /ready
port: 8181
scheme: HTTP
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
---
apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
annotations:
prometheus.io/port: "9153"
prometheus.io/scrape: "true"
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.96.0.10
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
EOF
创建coredns
root@VM-16-2-ubuntu:~/coredns# kubectl apply -f coredns.yaml serviceaccount/coredns created clusterrole.rbac.authorization.k8s.io/system:coredns created clusterrolebinding.rbac.authorization.k8s.io/system:coredns created configmap/coredns created deployment.apps/coredns created service/kube-dns created
检查dns服务
root@VM-16-2-ubuntu:~# kubectl get pod -n kube-system NAME READY STATUS RESTARTS AGE calico-kube-controllers-56cdb7c587-7ckj6 1/1 Running 0 10m calico-node-6xlkh 1/1 Running 0 10m calico-node-n66nr 1/1 Running 0 10m calico-node-t27pp 1/1 Running 0 10m calico-typha-6775694657-4m28f 1/1 Running 0 10m coredns-6d86b45487-fpvd6 1/1 Running 0 35m
集群验证
等kube-system命名空间下的Pod都为Running，这里先测试一下dns是否正常
cat<<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx
spec:
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- image: nginx:alpine
name: nginx
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx
spec:
selector:
app: nginx
type: NodePort
ports:
- protocol: TCP
port: 80
targetPort: 80
nodePort: 30001
---
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: abcdocker9/centos:v1
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
EOF
创建后Pod我们进行检查
root@VM-16-2-ubuntu:~/metrics-server# kubectl get pod,svc NAME READY STATUS RESTARTS AGE pod/busybox 1/1 Running 0 50s pod/nginx-6fb79bc456-vskg6 1/1 Running 0 50s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 35h service/nginx NodePort 10.109.148.61 <none> 80:30001/TCP 50s
root@VM-16-2-ubuntu:~/metrics-server# kubectl exec -ti busybox -- nslookup kubernetes Server: 10.96.0.10 Address: 10.96.0.10#53 Name: kubernetes.default.svc.cluster.local Address: 10.96.0.1
for i in k8s-01 k8s-02 k8s-03;do ssh root@$i curl -s 10.109.148.61 #nginx svc ip ssh root@$i curl -s 10.88.0.2 #pod ip done
在任意一台节点访问ip:30001端口，测试nginx
如果安全组没有打开，需要开启一下哈~
Metrics Server
mkdir /root/metrics-server
cd /root/metrics-server
cat > metrics-server.yaml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
spec:
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
image: registry.cn-beijing.aliyuncs.com/abcdocker/metrics-server:0.5.0
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
initialDelaySeconds: 20
periodSeconds: 10
resources:
requests:
cpu: 100m
memory: 200Mi
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
EOF
创建metrics-server
root@VM-16-2-ubuntu:~/metrics-server# ls metrics-server.yaml root@VM-16-2-ubuntu:~/metrics-server# kubectl apply -f metrics-server.yaml serviceaccount/metrics-server created clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created clusterrole.rbac.authorization.k8s.io/system:metrics-server created rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created service/metrics-server created deployment.apps/metrics-server created apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
稍等几分钟我们就可以通过kubectl top node查看到各个节点的资源使用情况
root@VM-16-2-ubuntu:~/metrics-server# kubectl top node NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% vm-16-2-ubuntu 81m 4% 1704Mi 51% vm-16-3-ubuntu 91m 4% 1625Mi 48% vm-16-5-ubuntu 63m 3% 1637Mi 49%
Pod也是可以看到
root@VM-16-2-ubuntu:~/metrics-server# kubectl top pod -n kube-system NAME CPU(cores) MEMORY(bytes) coredns-6d86b45487-2rctn 1m 11Mi kube-flannel-ds-52b25 2m 12Mi kube-flannel-ds-mbc64 2m 11Mi kube-flannel-ds-qzw95 2m 11Mi metrics-server-6d6549d5d4-kxkxn 3m 13Mi
Dashboard 安装
wget https://d.frps.cn/file/kubernetes/dashboard/dashboard.yaml wget https://d.frps.cn/file/kubernetes/dashboard/dashboard-user.yaml kubectl apply -f dashboard.yaml kubectl apply -f dashboard-user.yaml
更改dashboard的svc为NodePort
kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard type: NodePort
查看nodeport 端口号
root@VM-16-2-ubuntu:~# kubectl get svc kubernetes-dashboard -n kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes-dashboard NodePort 10.108.54.145 <none> 443:31816/TCP 38s
创建token访问
root@VM-16-2-ubuntu:~# kubectl -n kubernetes-dashboard create token admin-user eyJhbGciOiJSUzI1NiIsImtpZCI6IkN3b3lVOVRmM0owZEktNVZ6b0l1a293aGlDRzRzcDg2Y1AwNDV2elRmQUkifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjU4MjE0NTY5LCJpYXQiOjE2NTgyMTA5NjksImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiMmUwOWYwNTctZDgxOS00YTliLWE5NzYtNWJmMzlhOWI3N2M5In19LCJuYmYiOjE2NTgyMTA5NjksInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlcm5ldGVzLWRhc2hib2FyZDphZG1pbi11c2VyIn0.w1BnhhMJZ6BAKDm5HT7PZECM5o7cCe_bcJXpnkIqqxgDPyExBX8ax7jZpZ4EbLP5RvjUzdDfiHrc1A6XGwUBqupMmqk6kXxRQwSmnugTn7LSXNw1PEgc9VgbbWhcapov3gF_aASIqAGO2ER1fxvbDBoOc33HxTp1rsl49GsDqRFPH1hUaCf284oG5zkhA4lh7ubvtYq9wYKLzIM1HomBCGWFKbssh0jYHdhoASYIFnRbUX_B7ADTJS2AQd13xF7mlup9cETe51_KG_f6M1nEbqhMihNU11lkO-67cz0Jv632Uvh-qfTj96SnaFEg4kgH69KKrquZ1929_8u5qnMu2Q
使用浏览器访问
任意Node IP:31816 (31816端口号是需要通过kubectl get svc获取到，端口号为随机生成，也可以直接指定)
下面填写上面token内容
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