playbook部署flanneld

playbook部署flanneld


定义主机组

说明：

1、playbook的主机组必须要和playbook文件在同一个目录下否则会报如下错误：

[root@test1 profile]# ansible-playbook -i hosts deploy_flanneld.yaml --list-hosts
 [WARNING]: Unable to parse /k8s/profile/hosts as an inventory source

 [WARNING]: No inventory was parsed, only implicit localhost is available

 [WARNING]: Could not match supplied host pattern, ignoring: all

2、执行playbook必须要在plyaybook的文件所在目录下执行，否则报错；跟带不带绝对路径没有关系，必须保证在同一个目录

cat >/k8s/profile/hosts <<EOF
[k8s]
192.168.0.91
192.168.0.92
192.168.0.93

[test0]
192.168.0.92
192.168.0.93


[test1]
192.168.0.91

[test2]
192.168.0.92

[test3]
192.168.0.93

[test4]
192.168.0.94
EOF



说明：在playbook中定义了通过kubectl安装flanneld 

本实例中定义了两个变量cluster_cidr="172.30.0.0/16"  iface="ens33"  变量名称必须小写，对应模板文件中的"Network": "{{ cluster_cidr }}",  iface={{ iface }}

cat > /k8s/profile/deploy_flanneld.yaml <<EOF
- hosts: test4
  remote_user: root
  become: yes
  become_method: sudo
  vars:
    cluster_cidr: 172.30.0.0/16
    iface: ens33
  tasks:
    - name: copy flanneld config file
      template: src=/k8s/profile/kube-flannel.yml.j2 dest=/k8s/profile/kube-flannel.yml
    - name: install_flanneld
      command: kubectl apply -f /k8s/profile/kube-flannel.yml 
EOF


创建模板文件

mkdir -p /k8s/profile/

cat > /k8s/profile/kube-flannel.yml.j2 << EOF
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
rules:
  - apiGroups:
      - ""
    resources:
      - pods
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - nodes
    verbs:
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - nodes/status
    verbs:
      - patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: flannel
subjects:
- kind: ServiceAccount
  name: flannel
  namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: flannel
  namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: kube-flannel-cfg
  namespace: kube-system
  labels:
    tier: node
    app: flannel
data:
  cni-conf.json: |
    {
      "name": "cbr0",
      "plugins": [
        {
          "type": "flannel",
          "delegate": {
            "hairpinMode": true,
            "isDefaultGateway": true
          }
        },
        {
          "type": "portmap",
          "capabilities": {
            "portMappings": true
          }
        }
      ]
    }
  net-conf.json: |
    {
      "Network": "{{ cluster_cidr }}",
      "Backend": {
        "Type": "vxlan"
      }
    }
---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: kube-flannel-ds
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      hostNetwork: true
      nodeSelector:
        beta.kubernetes.io/arch: amd64
      tolerations:
      - key: node-role.kubernetes.io/master
        operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: registry.cn-shanghai.aliyuncs.com/gcr-k8s/flannel:v0.10.0-amd64
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: registry.cn-shanghai.aliyuncs.com/gcr-k8s/flannel:v0.10.0-amd64
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        - --iface={{ iface }}
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: true
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
EOF


开始部署

ansible /k8s/profile/deploy_flanneld.yaml