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k8s配置calico,以及配置ip固定

2023年 7月 9日 68.8k 0

接上文： K8S V.1.10.0 二进制安装

1.calicoctl的下载和配置
这里的配置calicoctl版本使用的是v1.2.0-6-gd1c370c 下载地址为：
http://www.sadlar.cn/wp-content/uploads/2018/05/calicoctl.bin
如果使用最新版的calicoctl 使用方法参考：https://docs.projectcalico.org/v3.1/usage/configuration/bgp](https://docs.projectcalico.org/v3.1/usage/configuration/bgp

 chmod +x calicoct ETCD_ENDPOINTS=http://calico-etcd-hostip:6666 这里假定交换机的asnumber是65000 asnumber需要和网络人员协调，共同配置，所以这里只贴出主机层面的配置参考

2.部署calico-etcd

  • 给node节点打标签 #calico-etcd-hostip就是这个节点的ip
kubectl label node kube-master02 calico-etcd=calico-etcd #这一步配合calico.yaml里的node节点亲和

 

  • 配置节点亲和
affinity:
  nodeAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      nodeSelectorTerms:
        - matchExpressions:
          - key: calico-etcd
            operator: In
            values: ["calico-etcd"]
  • 部署etcd：etcd-deployment.yaml
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: calico-etcd
  namespace: kube-system
  labels:
    k8s-app: calico-etcd
spec:
  replicas: 1
  template:
    metadata:
      labels:
        k8s-app: calico-etcd
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                - key: calico-etcd
                  operator: In
                  values: ["calico-etcd"]
      # Only run this pod on the master.
      #tolerations:
      #- key: node-role.kubernetes.io/master
      #  effect: NoSchedule
      # Allow this pod to be rescheduled while the node is in "critical add-ons only" mode.
      # This, along with the annotation above marks this pod as a critical add-on.
      #- key: CriticalAddonsOnly
      #  operator: Exists
      #nodeSelector:
      #  node-role.kubernetes.io/master: ""
      hostNetwork: true
      containers:
        - name: calico-etcd
          image: hub-dev.example.com/k8s/etcd:2.2.1
          env:
            - name: CALICO_ETCD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
          command: ["/bin/sh","-c"]
          args: ["/usr/local/bin/etcd --name=calico --data-dir=/var/etcd/calico-data --advertise-client-urls=http://$CALICO_ETCD_IP:6666 --listen-client-urls=http://0.0.0.0:6666 --listen-peer-urls=http://0.0.0.0:6667"]
          volumeMounts:
            - name: var-etcd
              mountPath: /var/etcd
      volumes:
        - name: var-etcd
          hostPath:
            path: /var/etcd

---

# This manifest installs the Service which gets traffic to the Calico
# etcd.
apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: calico-etcd
  name: calico-etcd
  namespace: kube-system
spec:
  # Select the calico-etcd pod running on the master.
  selector:
    k8s-app: calico-etcd
  clusterIP: 10.225.0.222
  ports:
    - port: 6666
  • -应用: 
     kubectl apply -f etcd-deployment.yaml

3.calicoctl设置as号

calicoctl config set asNumber 65000
  • 与附近机器建立per开关
calicoctl config get nodeToNodeMesh  calicoctl config set nodeToNodeMesh on  calicoctl config set nodeToNodeMesh off

4.与交换机10.255.72.254的asNumber: 65000建立bgp通信
10.255.72.254 是我这里的交换机对接节点，具体情况实际参考自己的网络环境。

  •  calico-bgp-netberhood.json
 apiVersion: v1  kind: bgpPeer  metadata:  peerIP: 10.255.72.254  scope: global  spec:  asNumber: 65000

calicoctl create -f calico-bgp-netberhood.json

关闭pod网络访问外部的NAT,并宣告calico本身的网段

  • calico-disable-nat-subnet.json
apiVersion: v1
kind: ipPool
metadata:
  cidr: 10.229.0.0/16
spec:
  ipip:
    enabled: false
  nat-outgoing: false
  disabled: false

calicoctl create -f calico-disable-nat-subnet.json

5.创建calico部署

– calico-rbac.yaml

---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: calico-cni-plugin
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: calico-cni-plugin
subjects:
- kind: ServiceAccount
  name: calico-cni-plugin
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: calico-cni-plugin
  namespace: kube-system
rules:
  - apiGroups: [""]
    resources:
      - pods
      - nodes
    verbs:
      - get
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: calico-cni-plugin
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: calico-policy-controller
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: calico-policy-controller
subjects:
- kind: ServiceAccount
  name: calico-policy-controller
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: calico-policy-controller
  namespace: kube-system
rules:
  - apiGroups:
    - ""
    - extensions
    resources:
      - pods
      - namespaces
      - networkpolicies
    verbs:
      - watch
      - list
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: calico-policy-controller
  namespace: kube-system

– calico-configmap.yaml

---

kind: ConfigMap
apiVersion: v1
metadata:
  name: calico-config
  namespace: kube-system
data:
  etcd_endpoints: "http://10.255.73.197:6666"
  calico_backend: "bird"
  cni_network_config: |-
    {
        "name": "k8s-pod-network",
        "cniVersion": "0.1.0",
        "type": "calico",
        "etcd_endpoints": "__ETCD_ENDPOINTS__",
        "log_level": "info",
        "ipam": {
            "type": "calico-ipam"
        },
        "policy": {
            "type": "k8s",
             "k8s_api_root": "https://__KUBERNETES_SERVICE_HOST__:__KUBERNETES_SERVICE_PORT__",
             "k8s_auth_token": "__SERVICEACCOUNT_TOKEN__"
        },
        "kubernetes": {
            "kubeconfig": "/etc/cni/net.d/__KUBECONFIG_FILENAME__"
        }
    }

– calico-Deployment.yaml

---

kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
  name: calico-node
  namespace: kube-system
  labels:
    k8s-app: calico-node
spec:
  selector:
    matchLabels:
      k8s-app: calico-node
  template:
    metadata:
      labels:
        k8s-app: calico-node
      annotations:
        # Mark this pod as a critical add-on; when enabled, the critical add-on scheduler
        # reserves resources for critical add-on pods so that they can be rescheduled after
        # a failure.  This annotation works in tandem with the toleration below.
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      hostNetwork: true
      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      # Allow this pod to be rescheduled while the node is in "critical add-ons only" mode.
      # This, along with the annotation above marks this pod as a critical add-on.
      - key: CriticalAddonsOnly
        operator: Exists
      serviceAccountName: calico-cni-plugin
      containers:
        # Runs calico/node container on each Kubernetes node.  This
        # container programs network policy and routes on each
        # host.
        - name: calico-node
          image: hub-dev.example.com/k8s/node:v1.3.0
          env:
            # The location of the Calico etcd cluster.
            - name: ETCD_ENDPOINTS
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_endpoints
            # Enable BGP.  Disable to enforce policy only.
            - name: CALICO_NETWORKING_BACKEND
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: calico_backend
            # Disable file logging so `kubectl logs` works.
            - name: CALICO_DISABLE_FILE_LOGGING
              value: "true"
            # Set Felix endpoint to host default action to ACCEPT.
            - name: FELIX_DEFAULTENDPOINTTOHOSTACTION
              value: "ACCEPT"
            # Configure the IP Pool from which Pod IPs will be chosen.
            - name: CALICO_IPV4POOL_CIDR
              value: "10.224.0.0/16"
            - name: CALICO_IPV4POOL_IPIP
              value: "always"
            # Disable IPv6 on Kubernetes.
            - name: FELIX_IPV6SUPPORT
              value: "false"
            # Set Felix logging to "info"
            - name: FELIX_LOGSEVERITYSCREEN
              value: "info"
            # Auto-detect the BGP IP address.
            - name: IP
              value: ""
          securityContext:
            privileged: true
          resources:
            requests:
              cpu: 300m
          volumeMounts:
            - mountPath: /lib/modules
              name: lib-modules
              readOnly: true
            - mountPath: /var/run/calico
              name: var-run-calico
              readOnly: false
        # This container installs the Calico CNI binaries
        # and CNI network config file on each node.
        - name: install-cni
          image: hub-dev.example.com/k8s/cni:v1.9.1
          command: ["/install-cni.sh"]
          env:
            # The location of the Calico etcd cluster.
            - name: ETCD_ENDPOINTS
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_endpoints
            # The CNI network config to install on each node.
            - name: CNI_NETWORK_CONFIG
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: cni_network_config
          volumeMounts:
            - mountPath: /host/opt/cni/bin
              name: cni-bin-dir
            - mountPath: /host/etc/cni/net.d
              name: cni-net-dir
      volumes:
        # Used by calico/node.
        - name: lib-modules
          hostPath:
            path: /lib/modules
        - name: var-run-calico
          hostPath:
            path: /var/run/calico
        # Used to install CNI.
        - name: cni-bin-dir
          hostPath:
            path: /opt/cni/bin
        - name: cni-net-dir
          hostPath:
            path: /etc/cni/net.d

---

# This manifest deploys the Calico policy controller on Kubernetes.
# See https://github.com/projectcalico/k8s-policy
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: calico-policy-controller
  namespace: kube-system
  labels:
    k8s-app: calico-policy
spec:
  # The policy controller can only have a single active instance.
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      name: calico-policy-controller
      namespace: kube-system
      labels:
        k8s-app: calico-policy-controller
      annotations:
        # Mark this pod as a critical add-on; when enabled, the critical add-on scheduler
        # reserves resources for critical add-on pods so that they can be rescheduled after
        # a failure.  This annotation works in tandem with the toleration below.
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      # The policy controller must run in the host network namespace so that
      # it isn't governed by policy that would prevent it from working.
      hostNetwork: true
      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      # Allow this pod to be rescheduled while the node is in "critical add-ons only" mode.
      # This, along with the annotation above marks this pod as a critical add-on.
      - key: CriticalAddonsOnly
        operator: Exists
      serviceAccountName: calico-policy-controller
      containers:
        - name: calico-policy-controller
          image: hub-dev.example.com/k8s/kube-policy-controller:v0.6.0
          env:
            # The location of the Calico etcd cluster.
            - name: ETCD_ENDPOINTS
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_endpoints
            # The location of the Kubernetes API.  Use the default Kubernetes
            # service for API access.
            - name: K8S_API
              value: "https://kubernetes.default:443"
            #  value: "https://10.255.73.73:6443"
            # Since we're running in the host namespace and might not have KubeDNS
            # access, configure the container's /etc/hosts to resolve
            # kubernetes.default to the correct service clusterIP.
            - name: CONFIGURE_ETC_HOSTS
              value: "true"

– 应用：

kubectl apply -f calico-configmap.yaml
kubectl apply -f calico-rbac.yaml
kubectl apply -f calico-Deployment.yaml

6. 查看node状态

calicoctl node status

7. 网络设备上的配置 这里以juniper为例：

set protocols bgp group peer-72-193 type internal
set protocols bgp group peer-72-193 local-address 10.255.72.254
set protocols bgp group peer-72-193 neighbor 10.255.72.193

8.ip固定

– 使用如下配置给pod固定ip

annotations:
cni.projectcalico.org/ipAddrs: “[\”10.224.0.20\”]”

– 模版文件


apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
  labels:
    app: myapp
  annotations:
    cni.projectcalico.org/ipAddrs: "[\"10.224.0.20\"]"
spec:
  containers:
  - name: myapp-container
    image: busybox
    command: ['sh', '-c', 'echo Hello Kubernetes! && sleep 3600']
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