kubeadm 部署kubernetes 1.11.0 的问题记录

柔光的暖阳◎ 2022-05-18 03:38 230阅读 0赞

**系统环境**

[root@kubeadm ~]# cat /etc/redhat-release 
    CentOS Linux release 7.5.1804 (Core)

关闭selinux

[root@kubeadm ~]# cat /etc/selinux/config 
    
    # This file controls the state of SELinux on the system.
    # SELINUX= can take one of these three values:
    # enforcing - SELinux security policy is enforced.
    # permissive - SELinux prints warnings instead of enforcing.
    # disabled - No SELinux policy is loaded.
    SELINUX=disabled
    # SELINUXTYPE= can take one of three two values:
    # targeted - Targeted processes are protected,
    # minimum - Modification of targeted policy. Only selected processes are protected. 
    # mls - Multi Level Security protection.
    SELINUXTYPE=targeted

编辑kubelet的启动环境变量，该变量要与docker的cgroup-driver驱动一样

docker的cgroup-driver驱动

[root@kubeadm ~]# docker info
    Containers: 10
     Running: 10
     Paused: 0
     Stopped: 0
    Images: 7
    Server Version: 1.13.1
    Storage Driver: overlay2
     Backing Filesystem: xfs
     Supports d_type: true
     Native Overlay Diff: false
    Logging Driver: journald
    Cgroup Driver: systemd

kubelet的cgroup-driver驱动

[root@kubeadm ~]# cat /etc/default/kubelet 
    KUBELET_KUBEADM_EXTRA_ARGS=--cgroup-driver=systemd

安装docker

yum install -y docker
    systemctl enable docker && systemctl start docker

添加谷歌的yum源

[root@kubeadm ~]# cat /etc/yum.repos.d/kubernetes.repo 
    [kubernetes]
    name=Kubernetes
    baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
    enabled=1
    gpgcheck=1
    repo_gpgcheck=1
    gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

安装`kubelet kubeadm kubectl`

yum install -y kubelet kubeadm kubectl
    systemctl enable kubelet

注意：这一步不能直接执行 `systemctl start kubelet`，否侧会报错，kubelet也起动不成功

7月 29 12:17:19 kubeadm systemd[1]: Started kubelet: The Kubernetes Node Agent.
    7月 29 12:17:19 kubeadm systemd[1]: Starting kubelet: The Kubernetes Node Agent...
    7月 29 12:17:20 kubeadm kubelet[32751]: F0729 12:17:20.026220   32751 server.go:190] failed to load Kubelet config file /var/lib/kubelet/config.yaml, error failed to read kubelet config file "/var/lib/kubelet/config.yaml", error: open /var/lib/kubelet/config.yaml: no such file or directory

[相关文章][Link 1]

直接执行

[root@kubeadm ~]# kubeadm init
    [init] using Kubernetes version: v1.11.1
    [preflight] running pre-flight checks
        [WARNING Firewalld]: firewalld is active, please ensure ports [6443 10250] are open or your cluster may not function correctly
    I0729 12:24:37.097036     574 kernel_validator.go:81] Validating kernel version
    I0729 12:24:37.097124     574 kernel_validator.go:96] Validating kernel config
        [WARNING Hostname]: hostname "kubeadm" could not be reached
        [WARNING Hostname]: hostname "kubeadm" lookup kubeadm on 10.155.0.1:53: no such host
    [preflight/images] Pulling images required for setting up a Kubernetes cluster
    [preflight/images] This might take a minute or two, depending on the speed of your internet connection
    [preflight/images] You can also perform this action in beforehand using 'kubeadm config images pull'
    
    [kubelet] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
    [kubelet] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
    [preflight] Activating the kubelet service
    [certificates] Generated ca certificate and key.
    [certificates] Generated apiserver certificate and key.

[root@kubeadm ~]# systemctl status kubelet
    ● kubelet.service - kubelet: The Kubernetes Node Agent
       Loaded: loaded (/etc/systemd/system/kubelet.service; enabled; vendor preset: disabled)
      Drop-In: /etc/systemd/system/kubelet.service.d └─10-kubeadm.conf Active: active (running) since 日 2018-07-29 12:27:18 CST; 1min 10s ago
         Docs: http://kubernetes.io/docs/
     Main PID: 917 (kubelet)
       CGroup: /system.slice/kubelet.service
               └─917 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib...
    
    7月 29 12:28:10 kubeadm kubelet[917]: W0729 12:28:10.689546     917 cni.go:172] Unable to update cni config: No networks found in /etc/cni/net.d 7月 29 12:28:10 kubeadm kubelet[917]: E0729 12:28:10.689653 917 kubelet.go:2110] Container runtime network not ready: NetworkReady=false reas...itialized 7月 29 12:28:15 kubeadm kubelet[917]: W0729 12:28:15.691030 917 cni.go:172] Unable to update cni config: No networks found in /etc/cni/net.d 7月 29 12:28:15 kubeadm kubelet[917]: E0729 12:28:15.691284 917 kubelet.go:2110] Container runtime network not ready: NetworkReady=false reas...itialized 7月 29 12:28:20 kubeadm kubelet[917]: E0729 12:28:20.683083 917 summary.go:102] Failed to get system container stats for "/system.slice/kubelet.servic... 7月 29 12:28:20 kubeadm kubelet[917]: E0729 12:28:20.683103 917 summary.go:102] Failed to get system container stats for "/system.slice/docke....service" 7月 29 12:28:20 kubeadm kubelet[917]: W0729 12:28:20.692520 917 cni.go:172] Unable to update cni config: No networks found in /etc/cni/net.d 7月 29 12:28:20 kubeadm kubelet[917]: E0729 12:28:20.692688 917 kubelet.go:2110] Container runtime network not ready: NetworkReady=false reas...itialized 7月 29 12:28:25 kubeadm kubelet[917]: W0729 12:28:25.694158 917 cni.go:172] Unable to update cni config: No networks found in /etc/cni/net.d 7月 29 12:28:25 kubeadm kubelet[917]: E0729 12:28:25.694261 917 kubelet.go:2110] Container runtime network not ready: NetworkReady=false reas...itialized Hint: Some lines were ellipsized, use -l to show in full.

后续跟之后的和低版本的部署都是一样的了，在这里就不详细讲了

参考  
[install-kubeadm][]

[Link 1]: https://github.com/kubernetes/kubernetes/issues/65863
[install-kubeadm]: https://kubernetes.io/docs/setup/independent/install-kubeadm/