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COOKBOOK-Kubernetes二进制高可用部署-Flannel

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下载 Flannel 相关文件

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# 选用版本：0.26.7
wget -P /usr/local/src https://github.com/flannel-io/flannel/releases/download/v0.26.7/kube-flannel.yml

修改 Yaml 内容

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# 修改 pod cidr 信息
sed -i 's/\("Network": \).*/\1"20.20.0.0\/16",/' /usr/local/src/kube-flannel.yml
# 新增指定网卡信息
sed -i '/--kube-subnet-mgr/a\        - --iface=enp0s8' /usr/local/src/kube-flannel.yml

运行 Flannel

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kubectl --kubeconfig=/etc/kubernetes/admin.kubeconfig create -f /usr/local/src/kube-flannel.yml

结果

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# kubectl get node 命令结果，节点从 NotReady 转变为 Ready
NAME             STATUS   ROLES    AGE   VERSION
192.168.56.109   Ready    <none>   47h   v1.31.2
192.168.56.110   Ready    <none>   47h   v1.31.2
192.168.56.111   Ready    <none>   47h   v1.31.2


# 产生 kube-flannel 命名空间下 kube-flannel-ds 的 daemonset 以及它对应的 pod
NAMESPACE      NAME                             DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
kube-flannel   daemonset.apps/kube-flannel-ds   3         3         3       3            3           <none>          7h19m

NAMESPACE      NAME                        READY   STATUS    RESTARTS        AGE
kube-flannel   pod/kube-flannel-ds-775kd   1/1     Running   10 (147m ago)   165m
kube-flannel   pod/kube-flannel-ds-fxw76   1/1     Running   5 (158m ago)    165m
kube-flannel   pod/kube-flannel-ds-zwfqg   1/1     Running   0               165m


# 产生名为 flannel.1 的网络接口，ip 由 pod cidr 配置信息确定
flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default 
    link/ether be:69:89:e5:1a:66 brd ff:ff:ff:ff:ff:ff
    inet 20.20.0.0/32 scope global flannel.1
       valid_lft forever preferred_lft forever
    inet6 fe80::bc69:89ff:fee5:1a66/64 scope link 
       valid_lft forever preferred_lft forever


# 产生 /etc/cni/net.d/10-flannel.conflist 文件
{
  "name": "cbr0",
  "cniVersion": "0.3.1",
  "plugins": [
    {
      "type": "flannel",
      "delegate": {
        "hairpinMode": true,
        "isDefaultGateway": true
      }
    },
    {
      "type": "portmap",
      "capabilities": {
        "portMappings": true
      }
    }
  ]
}

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