kubernetes1.24+containerd搭建

 

1. 安装containerd

 

　　k8s1.24不支持docker作为运行时容器，需要采用containerd

　　k8s1.24可以支持docker的远程镜像

1.1. 安装

　　apt-get install containerd.io=1.6.6-1

1.2. 生成containerd默认配置文件(所有节点)

　　mv /etc/containerd/config.toml /etc/containerd/config.toml.orig

　　containerd config default > /etc/containerd/config.toml

1.3. 修改config.toml文件

  • endpoint加速器

　　　　[plugins."io.containerd.tracing.processor.v1.otlp"]

   　　　　　endpoint = "https://docker.mirrors.ustc.edu.cn/"

    　　  　　insecure = false

   　　  　　 protocol = “"

  • 修改sandbox_image

　　　　#sandbox_image = "k8s.gcr.io/pause:3.6"

    　　  sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.7"

  • 修改Systemdcgroup

　　　　[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]

            　　IoUid = 0

            　　NoNewKeyring = false

            　　NoPivotRoot = false

            　　Root = ""

            　　ShimCgroup = ""

            　　SystemdCgroup = true

  • 修改root和state的路径(看硬盘情况)

　　　　required_plugins = []

　　　　root = "/home/containerd/root"

　　　　state = "/home/containerd/state"

　　　　temp = ""

　　　　version = 2

1.4. 重启containerd

　　systemctl restart containerd

1.5. 查看镜像

　　sudo crictl image ls

　　 

1.6. 查看容器

　　sudo crictl ps

qiteck@server:~$ sudo crictl ps
WARN[0000] runtime connect using default endpoints: [unix:///var/run/dockershim.sock unix:///run/containerd/containerd.sock unix:///run/crio/crio.sock unix:///var/run/cri-dockerd.sock]. As the default settings are now deprecated, you should set the endpoint instead.
ERRO[0000] unable to determine runtime API version: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial unix /var/run/dockershim.sock: connect: no such file or directory"
WARN[0000] image connect using default endpoints: [unix:///var/run/dockershim.sock unix:///run/containerd/containerd.sock unix:///run/crio/crio.sock unix:///var/run/cri-dockerd.sock]. As the default settings are now deprecated, you should set the endpoint instead.
ERRO[0000] unable to determine image API version: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing dial unix /var/run/dockershim.sock: connect: no such file or directory"
CONTAINER           IMAGE               CREATED             STATE               NAME                ATTEMPT             POD ID              POD
ef543e51cfa0c       b008bec0252cb       5 hours ago         Running             omp                 0                   0fa6d165a2c35       omp-7696d4c57-2r6fl
706fb4abbdd02       cec7ba5a893a8       6 hours ago         Running             omp2                0                   2d63b9953013f       omp2-77689d4c5b-vmz2l
c589f102227c3       beac3508eacfe       30 hours ago        Running             account             0                   27abc088678b6       account-794585bbbb-p927k
433d94b8dd567       6358d98c814a7       31 hours ago        Running             game                0                   2c41d2412209b       game-7f44bb65f8-cjbrq
6b035346f216c       d9814b25e52ba       46 hours ago        Running             consul              0                   c390fa719ff8d       consul-server-2
6774c93cb6c59       d9814b25e52ba       46 hours ago        Running             consul              0                   6ab43d041c87a       consul-client-m7jwf
0134002a22882       d9814b25e52ba       46 hours ago        Running             consul              0                   54f1d07e965d1       consul-server-0
fb04bc0d7364e       2e858e385e1d1       46 hours ago        Running             gateway             0                   f0416f209774a       gateway-6d5fc9979f-99mmk
6d5fcf76bb4fa       4e845a6c446da       46 hours ago        Running             ota                 1                   baa0a202dab7c       ota-848849756c-zgz78
835c6b1d4d477       d349e70825881       46 hours ago        Running             advertise           1                   e6de5d636a3e1       advertise-74d996d7dd-w7fnh
46a2861697792       6e715ec1cdef6       46 hours ago        Running             file                1                   7e0ddf0e5d55d       file-7bbd64f796-frfff
f2a039b8e6cb6       94a191ac1e06d       46 hours ago        Running             device              1                   84607636a1206       device-75777b668c-n25kq
588286ca925e0       408c00be0844f       46 hours ago        Running             count               1                   5645003fb9953       count-679b5fb4bb-lfhbl
8a575ea4e8421       94a191ac1e06d       46 hours ago        Running             device              1                   20963e33e429d       device-75777b668c-w5dnx
086ed6c6e5be1       6e715ec1cdef6       46 hours ago        Running             file                1                   a11fcbbd7e88d       file-7bbd64f796-hn5pj
a83d8fc2ee00a       ef376b69a2934       46 hours ago        Running             sport               1                   f33a7bcafb377       sport-89bc7648f-4w46v
e7f76b6f1c84f       2f2f9a205f3c1       46 hours ago        Running             rcache              1                   ca980f5411acb       rcache-55f4549cb8-6cqmx
b709db2369dc1       ae97cd3e4622d       46 hours ago        Running             course              1                   96d75555bb645       course-694b96bd8d-6qqmk
97be53613824b       82a5eb76d151c       46 hours ago        Running             msg                 1                   1b2e5ea5c2aa8       msg-7dbd97bddd-mg6d4
546a1501a6ccd       49512e7b89bc1       46 hours ago        Running             erp                 1                   4d2c7b154361d       erp-6b879f8d7-krn5p
d598b2782d979       e237e85065092       46 hours ago        Running             kube-flannel        5                   26bb55717d190       kube-flannel-ds-rt8z5
2746d12ffc426       77b49675beae1       46 hours ago        Running             kube-proxy          5                   c4daf9ff2bba3       kube-proxy-ngnrv　　

2. 安装kubeadm、kubelet 和 kubectl

  • kubeadm：用来初始化集群的指令。
  • kubelet：在集群中的每个节点上用来启动 pod 和容器等。
  • kubectl：用来与集群通信的命令行工具。

　　安装1.24.0版本

　　环境是ubuntu22.04

　　sudo apt-get update && sudo apt-get install -y apt-transport-https curl

 

　　需要能访问google

　　curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

　　国内的源（此源可以使用，本次搭建使用的是此源）：

　　cat <<EOF >/etc/apt/sources.list.d/kubernetes.list

　　deb http://mirrors.ustc.edu.cn/kubernetes/apt kubernetes-xenial main

　　EOF

　　sudo apt-get update

　　sudo apt-get install -y kubelet=1.24.2-00 kubeadm=1.24.2-00 kubectl=1.24.2-00

　　sudo apt-mark hold kubelet kubeadm kubectl

 

　　安装完，看下版本：

xxxx@iZ2zeabl8ta0jq1nd850igZ:~/program$ kubectl version

WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short.  Use --output=yaml|json to get the full version.

Client Version: version.Info{Major:"1", Minor:"24", GitVersion:"v1.24.2", GitCommit:"f66044f4361b9f1f96f0053dd46cb7dce5e990a8", GitTreeState:"clean", BuildDate:"2022-06-15T14:22:29Z", GoVersion:"go1.18.3", Compiler:"gc", Platform:"linux/amd64"}

Kustomize Version: v4.5.4

The connection to the server localhost:8080 was refused - did you specify the right host or port

 

3. 关闭swap

　　如果不关闭kubernetes运行会出现错误， 即使安装成功了，node重启后也会出现kubernetes server运行错误。

  • 暂时关闭

　　　sudo swapoff -a 

  • 永久关闭

　　　编辑 /etc/fstab 文件

　　　vi /etc/fstab

 　　  将 /dev/mapper/centos-swap swap swap default 0 0 这一行前面加个 # 号将其注释掉。

 

4. master主节点启动

 

4.1. 清空数据

　　sudo rm -rf /var/lib/etcd

4.2. 生成默认配置文件

　　kubeadm config print init-defaults --kubeconfig ClusterConfiguration > kubeadm.yml

4.3. 修改配置文件

　　

 

　　name: logic需要是host的name，hostname获取

　　name也可以随便取，只要/etc/hosts里面有配置地址就可以，

　　podSubnet的地址需要和flannel一致，因为是通过flannel来分配ip地址的, k8s会在各个子王上面划分对应的ip网段

 

4.4. 指定配置文件初始化

　　

xxxx@iZ2zeabl8ta0jq1nd850igZ:~/program/k8s$ sudo kubeadm init --config kubeadm.yml

　　

　　提示这样就初始化成功k8s的master主节点了

 

  如果要先关闭，采用这个命令:

      sudo kubeadm reset

 

4.4. 查看pods：

xxxx@server:~$ sudo kubectl get pods --all-namespaces
NAMESPACE     NAME                                         READY   STATUS    RESTARTS        AGE
default       account-794585bbbb-p927k                     1/1     Running   0               29h
default       account-794585bbbb-xdlt7                     1/1     Running   0               29h
default       advertise-74d996d7dd-qtxzf                   1/1     Running   0               2d22h
default       advertise-74d996d7dd-w7fnh                   1/1     Running   1 (46h ago)     2d22h
default       consul-client-m7jwf                          1/1     Running   0               45h
default       consul-client-vpd94                          1/1     Running   0               45h
default       consul-server-0                              1/1     Running   0               45h
default       consul-server-1                              1/1     Running   0               45h
default       consul-server-2                              1/1     Running   0               45h
default       count-679b5fb4bb-hlqrj                       1/1     Running   0               2d22h
default       count-679b5fb4bb-lfhbl                       1/1     Running   1 (46h ago)     2d22h
default       course-694b96bd8d-6qqmk                      1/1     Running   1 (46h ago)     2d22h
default       course-694b96bd8d-j6lfw                      1/1     Running   0               2d22h

4.5. 拷贝授权登陆文件给当前用户：

　　 配置文件设置kubectl的使用，包括连接api服务器，证书权限等等

　　K8s会用到当前用户的权限，可以拷贝配置文件，或者设置链接

　　拷贝：

　　　　mkdir -p $HOME/.kube

    　　  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

   　　   sudo chown $(id -u):$(id -g) $HOME/.kube/config

　　软连接：

　　　　mkdir -p $HOME/.kube

　　　　sudo ln -sf /etc/kubernetes/admin.conf ~/.kube/config

 

　　否则将报错：The connection to the server localhost:8080 was refused - did you specify the right host or port?

　　如果按照前面这么配置还有问题的话，需要注意区分sudo和非sudo的情况，非sudo的情况下要保证对/etc/kubernetes/admin.conf的权限,

　　8080端口是kubectl默认请求的端口,这个是不安全的端口，安全的访问方式是https://localhost:6443

 

4.6. 修改nodeport端口范围：

　　Nodeport的默认端口范围是30000-32767

　　很影响使用，把它改成1-65535

 

　　编辑 kube-apiserver.yaml文件

　　vim /etc/kubernetes/manifests/kube-apiserver.yaml

　　找到 --service-cluster-ip-range 这一行，在这一行的下一行增加 如下内容

　　- --service-node-port-range=1-65535

　　实际内容如下:

　　

　　最后 重启 kubelet
　　sudo systemctl daemon-reload
　　sudo systemctl restart kubelet

 

4.7. 设置master节点可以部署pod

这是因为kubernetes出于安全考虑默认情况下无法在master节点上部署pod，

 

  • 1 node(s) had taint {node-role.kubernetes.io/master: } that the pod didn't tolerate.：

　　　　kubectl taint nodes --all node-role.kubernetes.io/master-

 

　　　　执行后将输出如下信息（其中报错可忽略）：

　　　　pastedGraphic.png

  • 1 node(s) had untolerated taint {node-role.kubernetes.io/control-plane: }. preemption: 0/1 nodes are available：

　　　　kubectl taint nodes --all node-role.kubernetes.io/control-plane-

 

4.8. 日志查看

　　　　

　　systemctl status kubelet

　　journalctl -xefu kubelet

　　vim /var/log/pods/kube-system_kube-apiserver

 

4.9. POD网络差距flannel安装

　　用来部署pod的地址

  • 　下载配置：

　　　　wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

  • 　修改配置文件：

　　　　确保kube-flannel.yml的这个字段“Network”: “10.244.0.0/16" 与kubeadm.conf的podSubnet地址一致

  • 　部署：

　　　　kubectl apply -f kube-flannel.yml

  • 　检测flannel进程是否启动：

　　　　qiteck@logic:~/program/k8s_1.24.2$ ps -ef|grep flannel

　　　　root        4673    4326  0 09:16 ?        00:00:00 /opt/bin/flanneld --ip-masq --kube-subnet-mgr

  • 检测flannel进程是否启动：
xxxx@server:~$ sudo kubectl get pods -n kube-system
NAME                                         READY   STATUS    RESTARTS        AGE
coredns-74586cf9b6-8mbqz                     1/1     Running   3 (6d23h ago)   6d23h
coredns-74586cf9b6-hz48p                     1/1     Running   3 (6d23h ago)   6d23h
etcd-master.cluster.k8s                      1/1     Running   5 (6d23h ago)   6d23h
kube-apiserver-master.cluster.k8s            1/1     Running   0               3d1h
kube-controller-manager-master.cluster.k8s   1/1     Running   7 (2d23h ago)   6d23h
kube-flannel-ds-rt8z5                        1/1     Running   5 (46h ago)     3d
kube-flannel-ds-t6nrc                        1/1     Running   1 (6d23h ago)   6d23h
kube-proxy-ngnrv                             1/1     Running   5 (46h ago)     3d
kube-proxy-tjh8h                             1/1     Running   4 (6d23h ago)   6d23h
kube-scheduler-master.cluster.k8s            1/1     Running   7 (2d23h ago)   6d23h
  • 看下cni0网卡是否有了：
xxxx@server:~$ ifconfig
br-0480d1b7cefb: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.18.0.1  netmask 255.255.0.0  broadcast 172.18.255.255
        inet6 fe80::42:e1ff:fe6e:8e3c  prefixlen 64  scopeid 0x20<link>
        ether 02:42:e1:6e:8e:3c  txqueuelen 0  (Ethernet)
        RX packets 84662  bytes 119261797 (119.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 83663  bytes 121420317 (121.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

cni0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 10.244.1.1  netmask 255.255.255.0  broadcast 10.244.1.255
        inet6 fe80::b821:f2ff:fe1d:809a  prefixlen 64  scopeid 0x20<link>
        ether ba:21:f2:1d:80:9a  txqueuelen 1000  (Ethernet)
        RX packets 9016802  bytes 993361285 (993.3 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6600536  bytes 1003467886 (1.0 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  • 看下是否有生成/run/flannel/subnet.env文件：

　　　　设置flannel插件的信息, 一旦flanneld启动，它会自动将一些数据写入/run/flannel/subnet.env

 

至此，k8s主节点已经搭建起来了。

posted @ 2022-07-15 16:40  若-飞  阅读(5723)  评论(0)  编辑  收藏  举报