a27.ansible 生产实战案例 -- 基于kubeadm安装kubernetes v1.20 -- Calico组件的安装

15.Calico组件的安装

15.1 安装calico

[root@ansible-server ansible]# mkdir -p roles/calico/{tasks,vars,templates}
[root@ansible-server ansible]# cd roles/calico
[root@ansible-server calico]# ls
tasks  templates  vars

[root@ansible-server calico]# vim vars/main.yml
HARBOR_DOMAIN: harbor.raymonds.cc

[root@ansible-server calico]# cat templates/calico-etcd.yaml.j2
---
# Source: calico/templates/calico-etcd-secrets.yaml
# The following contains k8s Secrets for use with a TLS enabled etcd cluster.
# For information on populating Secrets, see http://kubernetes.io/docs/user-guide/secrets/
apiVersion: v1
kind: Secret
type: Opaque
metadata:
  name: calico-etcd-secrets
  namespace: kube-system
data:
  # Populate the following with etcd TLS configuration if desired, but leave blank if
  # not using TLS for etcd.
  # The keys below should be uncommented and the values populated with the base64
  # encoded contents of each file that would be associated with the TLS data.
  # Example command for encoding a file contents: cat <file> | base64 -w 0
  # etcd-key: null
  # etcd-cert: null
  # etcd-ca: null
---
# Source: calico/templates/calico-config.yaml
# This ConfigMap is used to configure a self-hosted Calico installation.
kind: ConfigMap
apiVersion: v1
metadata:
  name: calico-config
  namespace: kube-system
data:
  # Configure this with the location of your etcd cluster.
  etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"
  # If you're using TLS enabled etcd uncomment the following.
  # You must also populate the Secret below with these files.
  etcd_ca: ""   # "/calico-secrets/etcd-ca"
  etcd_cert: "" # "/calico-secrets/etcd-cert"
  etcd_key: ""  # "/calico-secrets/etcd-key"
  # Typha is disabled.
  typha_service_name: "none"
  # Configure the backend to use.
  calico_backend: "bird"
  # Configure the MTU to use for workload interfaces and tunnels.
  # - If Wireguard is enabled, set to your network MTU - 60
  # - Otherwise, if VXLAN or BPF mode is enabled, set to your network MTU - 50
  # - Otherwise, if IPIP is enabled, set to your network MTU - 20
  # - Otherwise, if not using any encapsulation, set to your network MTU.
  veth_mtu: "1440"

  # The CNI network configuration to install on each node. The special
  # values in this config will be automatically populated.
  cni_network_config: |-
    {
    
    
      "name": "k8s-pod-network",
      "cniVersion": "0.3.1",
      "plugins": [
        {
    
    
          "type": "calico",
          "log_level": "info",
          "etcd_endpoints": "__ETCD_ENDPOINTS__",
          "etcd_key_file": "__ETCD_KEY_FILE__",
          "etcd_cert_file": "__ETCD_CERT_FILE__",
          "etcd_ca_cert_file": "__ETCD_CA_CERT_FILE__",
          "mtu": __CNI_MTU__,
          "ipam": {
    
    
              "type": "calico-ipam"
          },
          "policy": {
    
    
              "type": "k8s"
          },
          "kubernetes": {
    
    
              "kubeconfig": "__KUBECONFIG_FILEPATH__"
          }
        },
        {
    
    
          "type": "portmap",
          "snat": true,
          "capabilities": {
    
    "portMappings": true}
        },
        {
    
    
          "type": "bandwidth",
          "capabilities": {
    
    "bandwidth": true}
        }
      ]
    }

---
# Source: calico/templates/calico-kube-controllers-rbac.yaml

# Include a clusterrole for the kube-controllers component,
# and bind it to the calico-kube-controllers serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: calico-kube-controllers
rules:
  # Pods are monitored for changing labels.
  # The node controller monitors Kubernetes nodes.
  # Namespace and serviceaccount labels are used for policy.
  - apiGroups: [""]
    resources:
      - pods
      - nodes
      - namespaces
      - serviceaccounts
    verbs:
      - watch
      - list
      - get
  # Watch for changes to Kubernetes NetworkPolicies.
  - apiGroups: ["networking.k8s.io"]
    resources:
      - networkpolicies
    verbs:
      - watch
      - list
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: calico-kube-controllers
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: calico-kube-controllers
subjects:
- kind: ServiceAccount
  name: calico-kube-controllers
  namespace: kube-system
---

---
# Source: calico/templates/calico-node-rbac.yaml
# Include a clusterrole for the calico-node DaemonSet,
# and bind it to the calico-node serviceaccount.
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: calico-node
rules:
  # The CNI plugin needs to get pods, nodes, and namespaces.
  - apiGroups: [""]
    resources:
      - pods
      - nodes
      - namespaces
    verbs:
      - get
  - apiGroups: [""]
    resources:
      - endpoints
      - services
    verbs:
      # Used to discover service IPs for advertisement.
      - watch
      - list
  # Pod CIDR auto-detection on kubeadm needs access to config maps.
  - apiGroups: [""]
    resources:
      - configmaps
    verbs:
      - get
  - apiGroups: [""]
    resources:
      - nodes/status
    verbs:
      # Needed for clearing NodeNetworkUnavailable flag.
      - patch

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: calico-node
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: calico-node
subjects:
- kind: ServiceAccount
  name: calico-node
  namespace: kube-system

---
# Source: calico/templates/calico-node.yaml
# This manifest installs the calico-node container, as well
# as the CNI plugins and network config on
# each master and worker node in a Kubernetes cluster.
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: calico-node
  namespace: kube-system
  labels:
    k8s-app: calico-node
spec:
  selector:
    matchLabels:
      k8s-app: calico-node
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
      labels:
        k8s-app: calico-node
    spec:
      nodeSelector:
        kubernetes.io/os: linux
      hostNetwork: true
      tolerations:
        # Make sure calico-node gets scheduled on all nodes.
        - effect: NoSchedule
          operator: Exists
        # Mark the pod as a critical add-on for rescheduling.
        - key: CriticalAddonsOnly
          operator: Exists
        - effect: NoExecute
          operator: Exists
      serviceAccountName: calico-node
      # Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
      # deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
      terminationGracePeriodSeconds: 0
      priorityClassName: system-node-critical
      initContainers:
        # This container installs the CNI binaries
        # and CNI network config file on each node.
        - name: install-cni
          image: registry.cn-beijing.aliyuncs.com/dotbalo/cni:v3.15.3
          command: ["/install-cni.sh"]
          env:
            # Name of the CNI config file to create.
            - name: CNI_CONF_NAME
              value: "10-calico.conflist"
            # The CNI network config to install on each node.
            - name: CNI_NETWORK_CONFIG
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: cni_network_config
            # The location of the etcd cluster.
            - name: ETCD_ENDPOINTS
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_endpoints
            # CNI MTU Config variable
            - name: CNI_MTU
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: veth_mtu
            # Prevents the container from sleeping forever.
            - name: SLEEP
              value: "false"
          volumeMounts:
            - mountPath: /host/opt/cni/bin
              name: cni-bin-dir
            - mountPath: /host/etc/cni/net.d
              name: cni-net-dir
            - mountPath: /calico-secrets
              name: etcd-certs
          securityContext:
            privileged: true
        # Adds a Flex Volume Driver that creates a per-pod Unix Domain Socket to allow Dikastes
        # to communicate with Felix over the Policy Sync API.
        - name: flexvol-driver
          image: registry.cn-beijing.aliyuncs.com/dotbalo/pod2daemon-flexvol:v3.15.3
          volumeMounts:
          - name: flexvol-driver-host
            mountPath: /host/driver
          securityContext:
            privileged: true
      containers:
        # Runs calico-node container on each Kubernetes node. This
        # container programs network policy and routes on each
        # host.
        - name: calico-node
          image: registry.cn-beijing.aliyuncs.com/dotbalo/node:v3.15.3
          env:
            # The location of the etcd cluster.
            - name: ETCD_ENDPOINTS
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_endpoints
            # Location of the CA certificate for etcd.
            - name: ETCD_CA_CERT_FILE
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_ca
            # Location of the client key for etcd.
            - name: ETCD_KEY_FILE
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_key
            # Location of the client certificate for etcd.
            - name: ETCD_CERT_FILE
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_cert
            # Set noderef for node controller.
            - name: CALICO_K8S_NODE_REF
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            # Choose the backend to use.
            - name: CALICO_NETWORKING_BACKEND
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: calico_backend
            # Cluster type to identify the deployment type
            - name: CLUSTER_TYPE
              value: "k8s,bgp"
            # Auto-detect the BGP IP address.
            - name: IP
              value: "autodetect"
            # Enable IPIP
            - name: CALICO_IPV4POOL_IPIP
              value: "Always"
            # Enable or Disable VXLAN on the default IP pool.
            - name: CALICO_IPV4POOL_VXLAN
              value: "Never"
            # Set MTU for tunnel device used if ipip is enabled
            - name: FELIX_IPINIPMTU
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: veth_mtu
            # Set MTU for the VXLAN tunnel device.
            - name: FELIX_VXLANMTU
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: veth_mtu
            # Set MTU for the Wireguard tunnel device.
            - name: FELIX_WIREGUARDMTU
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: veth_mtu
            # The default IPv4 pool to create on startup if none exists. Pod IPs will be
            # chosen from this range. Changing this value after installation will have
            # no effect. This should fall within `--cluster-cidr`.
            # - name: CALICO_IPV4POOL_CIDR
            #   value: "192.168.0.0/16"
            # 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"
            # Disable IPv6 on Kubernetes.
            - name: FELIX_IPV6SUPPORT
              value: "false"
            # Set Felix logging to "info"
            - name: FELIX_LOGSEVERITYSCREEN
              value: "info"
            - name: FELIX_HEALTHENABLED
              value: "true"
          securityContext:
            privileged: true
          resources:
            requests:
              cpu: 250m
          livenessProbe:
            exec:
              command:
              - /bin/calico-node
              - -felix-live
              - -bird-live
            periodSeconds: 10
            initialDelaySeconds: 10
            failureThreshold: 6
          readinessProbe:
            exec:
              command:
              - /bin/calico-node
              - -felix-ready
              - -bird-ready
            periodSeconds: 10
          volumeMounts:
            - mountPath: /lib/modules
              name: lib-modules
              readOnly: true
            - mountPath: /run/xtables.lock
              name: xtables-lock
              readOnly: false
            - mountPath: /var/run/calico
              name: var-run-calico
              readOnly: false
            - mountPath: /var/lib/calico
              name: var-lib-calico
              readOnly: false
            - mountPath: /calico-secrets
              name: etcd-certs
            - name: policysync
              mountPath: /var/run/nodeagent
      volumes:
        # Used by calico-node.
        - name: lib-modules
          hostPath:
            path: /lib/modules
        - name: var-run-calico
          hostPath:
            path: /var/run/calico
        - name: var-lib-calico
          hostPath:
            path: /var/lib/calico
        - name: xtables-lock
          hostPath:
            path: /run/xtables.lock
            type: FileOrCreate
        # Used to install CNI.
        - name: cni-bin-dir
          hostPath:
            path: /opt/cni/bin
        - name: cni-net-dir
          hostPath:
            path: /etc/cni/net.d
        # Mount in the etcd TLS secrets with mode 400.
        # See https://kubernetes.io/docs/concepts/configuration/secret/
        - name: etcd-certs
          secret:
            secretName: calico-etcd-secrets
            defaultMode: 0400
        # Used to create per-pod Unix Domain Sockets
        - name: policysync
          hostPath:
            type: DirectoryOrCreate
            path: /var/run/nodeagent
        # Used to install Flex Volume Driver
        - name: flexvol-driver-host
          hostPath:
            type: DirectoryOrCreate
            path: /usr/libexec/kubernetes/kubelet-plugins/volume/exec/nodeagent~uds
---

apiVersion: v1
kind: ServiceAccount
metadata:
  name: calico-node
  namespace: kube-system

---
# Source: calico/templates/calico-kube-controllers.yaml
# See https://github.com/projectcalico/kube-controllers
apiVersion: apps/v1
kind: Deployment
metadata:
  name: calico-kube-controllers
  namespace: kube-system
  labels:
    k8s-app: calico-kube-controllers
spec:
  # The controllers can only have a single active instance.
  replicas: 1
  selector:
    matchLabels:
      k8s-app: calico-kube-controllers
  strategy:
    type: Recreate
  template:
    metadata:
      name: calico-kube-controllers
      namespace: kube-system
      labels:
        k8s-app: calico-kube-controllers
    spec:
      nodeSelector:
        kubernetes.io/os: linux
      tolerations:
        # Mark the pod as a critical add-on for rescheduling.
        - key: CriticalAddonsOnly
          operator: Exists
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
      serviceAccountName: calico-kube-controllers
      priorityClassName: system-cluster-critical
      # The controllers must run in the host network namespace so that
      # it isn't governed by policy that would prevent it from working.
      hostNetwork: true
      containers:
        - name: calico-kube-controllers
          image: registry.cn-beijing.aliyuncs.com/dotbalo/kube-controllers:v3.15.3
          env:
            # The location of the etcd cluster.
            - name: ETCD_ENDPOINTS
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_endpoints
            # Location of the CA certificate for etcd.
            - name: ETCD_CA_CERT_FILE
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_ca
            # Location of the client key for etcd.
            - name: ETCD_KEY_FILE
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_key
            # Location of the client certificate for etcd.
            - name: ETCD_CERT_FILE
              valueFrom:
                configMapKeyRef:
                  name: calico-config
                  key: etcd_cert
            # Choose which controllers to run.
            - name: ENABLED_CONTROLLERS
              value: policy,namespace,serviceaccount,workloadendpoint,node
          volumeMounts:
            # Mount in the etcd TLS secrets.
            - mountPath: /calico-secrets
              name: etcd-certs
          readinessProbe:
            exec:
              command:
              - /usr/bin/check-status
              - -r
      volumes:
        # Mount in the etcd TLS secrets with mode 400.
        # See https://kubernetes.io/docs/concepts/configuration/secret/
        - name: etcd-certs
          secret:
            secretName: calico-etcd-secrets
            defaultMode: 0400

---

apiVersion: v1
kind: ServiceAccount
metadata:
  name: calico-kube-controllers
  namespace: kube-system

---
# Source: calico/templates/calico-typha.yaml

---
# Source: calico/templates/configure-canal.yaml

---
# Source: calico/templates/kdd-crds.yaml

#修改下面内容
[root@ansible-server calico]# grep "etcd_endpoints:.*" templates/calico-etcd.yaml.j2 
  etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"

[root@ansible-server calico]# sed -i 's#etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"#etcd_endpoints: "{% for i in groups.master %}https://{
    
    { hostvars[i].ansible_default_ipv4.address }}:2379{% if not loop.last %},{% endif %}{% endfor %}"#g' templates/calico-etcd.yaml.j2  

[root@ansible-server calico]# grep "etcd_endpoints:.*" templates/calico-etcd.yaml.j2
  etcd_endpoints: {
    
    % for i in groups.master %}https://{
    
    {
    
     hostvars[i].ansible_default_ipv4.address }}{
    
    % if not loop.last %},{
    
    % endif %}{
    
    % endfor %}	

[root@ansible-server calico]# vim tasks/calico_file.yml
- name: copy calico-etcd.yaml file
  template:
    src: calico-etcd.yaml.j2
    dest: /root/calico-etcd.yaml
  when:
    - ansible_hostname=="k8s-master01"

[root@ansible-server calico]# vim tasks/config.yml
- name: get ETCD_KEY key
  shell:
    cmd: cat /etc/kubernetes/pki/etcd/server.key | base64 | tr -d '\n'
  register: ETCD_KEY
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*etcd-key:.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '# (etcd-key:) null'
    replace: '\1 {
    
    { ETCD_KEY.stdout }}'
  when:
    - ansible_hostname=="k8s-master01"
- name: get ETCD_CERT key
  shell:
    cmd: cat /etc/kubernetes/pki/etcd/server.crt | base64 | tr -d '\n'
  register: ETCD_CERT
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*etcd-cert:.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '# (etcd-cert:) null'
    replace: '\1 {
    
    { ETCD_CERT.stdout }}'
  when:
    - ansible_hostname=="k8s-master01"
- name: get ETCD_CA key
  shell:
    cmd: cat /etc/kubernetes/pki/etcd/ca.crt | base64 | tr -d '\n'
  when:
    - ansible_hostname=="k8s-master01"
  register: ETCD_CA
- name: Modify the ".*etcd-ca:.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '# (etcd-ca:) null'
    replace: '\1 {
    
    { ETCD_CA.stdout }}'
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*etcd_ca:.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '(etcd_ca:) ""'
    replace: '\1 "/calico-secrets/etcd-ca"'
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*etcd_cert:.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '(etcd_cert:) ""'
    replace: '\1 "/calico-secrets/etcd-cert"'
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*etcd_key:.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '(etcd_key:) ""'
    replace: '\1 "/calico-secrets/etcd-key"'
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*CALICO_IPV4POOL_CIDR.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '# (- name: CALICO_IPV4POOL_CIDR)'
    replace: '\1'
  when:
    - ansible_hostname=="k8s-master01"
- name: get POD_SUBNET
  shell:
    cmd: cat /etc/kubernetes/manifests/kube-controller-manager.yaml | grep cluster-cidr= | awk -F= '{print $NF}'
  register: POD_SUBNET
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the ".*192.168.0.0.*" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '#   (value:) "192.168.0.0/16"'
    replace: '  \1 "{
    
    { POD_SUBNET.stdout }}"'
  when:
    - ansible_hostname=="k8s-master01"
- name: Modify the "image:" line
  replace:
    path: /root/calico-etcd.yaml
    regexp: '(.*image:) docker.io/calico(/.*)'
    replace: '\1 {
    
    { HARBOR_DOMAIN }}/google_containers\2'
  when:
    - ansible_hostname=="k8s-master01"

[root@ansible-server calico]# vim tasks/download_images.yml
- name: get calico version
  shell:
    chdir: /root
    cmd: awk -F "/"  '/image:/{print $NF}' calico-etcd.yaml
  register: CALICO_VERSION
  when:
    - ansible_hostname=="k8s-master01"
- name: download calico image
  shell: |
    {
    
    % for i in CALICO_VERSION.stdout_lines %}
      docker pull registry.cn-beijing.aliyuncs.com/raymond9/{
    
    {
    
     i }}
      docker tag registry.cn-beijing.aliyuncs.com/raymond9/{
    
    {
    
     i }} {
    
    {
    
     HARBOR_DOMAIN }}/google_containers/{
    
    {
    
     i }}
      docker rmi registry.cn-beijing.aliyuncs.com/raymond9/{
    
    {
    
     i }}
      docker push {
    
    {
    
     HARBOR_DOMAIN }}/google_containers/{
    
    {
    
     i }}
    {
    
    % endfor %}
  when:
    - ansible_hostname=="k8s-master01"

[root@ansible-server calico]# vim tasks/install_calico.yml
- name: install calico
  shell:
    chdir: /root
    cmd: "kubectl --kubeconfig=/etc/kubernetes/admin.conf apply -f calico-etcd.yaml"
  when:
    - ansible_hostname=="k8s-master01"

[root@ansible-server calico]# vim tasks/main.yml
- include: calico_file.yml
- include: config.yml
- include: download_images.yml
- include: install_calico.yml

[root@ansible-server calico]# cd ../../
[root@ansible-server ansible]# tree roles/calico
roles/calico
├── tasks
│   ├── calico_file.yml
│   ├── config.yml
│   ├── download_images.yml
│   ├── install_calico.yml
│   └── main.yml
├── templates
│   └── calico-etcd.yaml.j2
└── vars
    └── main.yml

3 directories, 7 files

[root@ansible-server ansible]# vim calico_role.yml 
---
- hosts: master

  roles:
    - role: calico

[root@ansible-server ansible]# ansible-playbook calico_role.yml 

15.2 验证calico

[root@k8s-master01 ~]#  kubectl get pod -A |grep calico
kube-system   calico-kube-controllers-55bfb655fc-9gmdn             1/1     Running   0          2m42s
kube-system   calico-node-2gwjm                                    1/1     Running   0          2m42s
kube-system   calico-node-k8vtb                                    1/1     Running   0          2m42s
kube-system   calico-node-l5q6m                                    1/1     Running   0          2m42s
kube-system   calico-node-mrzrl                                    1/1     Running   0          2m42s
kube-system   calico-node-vk4n4                                    1/1     Running   0          2m42s
kube-system   calico-node-zwn7s                                    1/1     Running   0          2m42s

[root@k8s-master01 ~]# kubectl get nodes
NAME                         STATUS   ROLES                  AGE   VERSION
k8s-master01.example.local   Ready    control-plane,master   70m   v1.20.14
k8s-master02.example.local   Ready    control-plane,master   64m   v1.20.14
k8s-master03.example.local   Ready    control-plane,master   63m   v1.20.14
k8s-node01.example.local     Ready    <none>                 62m   v1.20.14
k8s-node02.example.local     Ready    <none>                 61m   v1.20.14
k8s-node03.example.local     Ready    <none>                 61m   v1.20.14