使用kubeadm在Centos8上部署kubernetes1.18

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Centos8系统发布已有一段时间，不少小伙伴开始上手使用。kubernetes1.18也发布了，今天作者使用kubeadm在Centos8系统上部署kubernetes。

1 系统准备

查看系统版本

[root@localhost]# cat /etc/centos-release
CentOS Linux release 8.1.1911 (Core)

配置网络

[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-enp0s3
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp0s3
UUID=039303a5-c70d-4973-8c91-97eaa071c23d
DEVICE=enp0s3
ONBOOT=yes
IPADDR=192.168.122.21
NETMASK=255.255.255.0
GATEWAY=192.168.122.1
DNS1=223.5.5.5

添加阿里源

[root@localhost ~]# rm -rfv /etc/yum.repos.d/*
[root@localhost ~]# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo

配置主机名

[root@master01 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.122.21 master01.paas.com master01

关闭swap，注释swap分区

[root@master01 ~]# swapoff -a
[root@master01 ~]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Tue Mar 31 22:44:34 2020
#
# Accessible filesystems, by reference, are maintained under ‘/dev/disk/‘.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run ‘systemctl daemon-reload‘ to update systemd
# units generated from this file.
#
/dev/mapper/cl-root     /                       xfs     defaults        0 0
UUID=5fecb240-379b-4331-ba04-f41338e81a6e /boot                   ext4    defaults        1 2
/dev/mapper/cl-home     /home                   xfs     defaults        0 0
#/dev/mapper/cl-swap     swap                    swap    defaults        0 0

配置内核参数，将桥接的IPv4流量传递到iptables的链

[root@master01 ~]# cat > /etc/sysctl.d/k8s.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

2 安装常用包

[root@master01 ~]# yum install vim bash-completion net-tools gcc -y

3 使用aliyun源安装docker-ce

[root@master01 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2
[root@master01 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@master01 ~]# yum -y install docker-ce

安装docker-ce如果出现以下错

[root@master01 ~]# yum -y install docker-ce
CentOS-8 - Base - mirrors.aliyun.com                                                                               14 kB/s | 3.8 kB     00:00
CentOS-8 - Extras - mirrors.aliyun.com                                                                            6.4 kB/s | 1.5 kB     00:00
CentOS-8 - AppStream - mirrors.aliyun.com                                                                          16 kB/s | 4.3 kB     00:00
Docker CE Stable - x86_64                                                                                          40 kB/s |  22 kB     00:00
Error:
 Problem: package docker-ce-3:19.03.8-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed
  - cannot install the best candidate for the job
  - package containerd.io-1.2.10-3.2.el7.x86_64 is excluded
  - package containerd.io-1.2.13-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.3.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.el7.x86_64 is excluded
  - package containerd.io-1.2.4-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.5-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.6-3.3.el7.x86_64 is excluded
(try to add ‘--skip-broken‘ to skip uninstallable packages or ‘--nobest‘ to use not only best candidate packages)

解决方法

[root@master01 ~]# wget https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
[root@master01 ~]# yum install containerd.io-1.2.6-3.3.el7.x86_64.rpm

然后再安装docker-ce即可成功
添加aliyundocker仓库加速器

[root@master01 ~]# mkdir -p /etc/docker
[root@master01 ~]# tee /etc/docker/daemon.json <<-‘EOF‘
{
  "registry-mirrors": ["https://fl791z1h.mirror.aliyuncs.com"]
}
EOF
[root@master01 ~]# systemctl daemon-reload
[root@master01 ~]# systemctl restart docker

4 安装kubectl、kubelet、kubeadm

添加阿里kubernetes源

[root@master01 ~]# cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

安装

[root@master01 ~]# yum install kubectl kubelet kubeadm
[root@master01 ~]# systemctl enable kubelet

5 初始化k8s集群

[root@master01 ~]# kubeadm init --kubernetes-version=1.18.0  \
--apiserver-advertise-address=192.168.122.21   \
--image-repository registry.aliyuncs.com/google_containers  \
--service-cidr=10.10.0.0/16 --pod-network-cidr=10.122.0.0/16

POD的网段为: 10.122.0.0/16， api server地址就是master本机IP。

这一步很关键，由于kubeadm 默认从官网k8s.grc.io下载所需镜像，国内无法访问，因此需要通过–image-repository指定阿里云镜像仓库地址。

集群初始化成功后返回如下信息：

W0408 09:36:36.121603   14098 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.0
[preflight] Running pre-flight checks
        [WARNING FileExisting-tc]: tc not found in system path
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using ‘kubeadm config images pull‘
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [master01.paas.com kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.10.0.1 192.168.122.21]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [master01.paas.com localhost] and IPs [192.168.122.21 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [master01.paas.com localhost] and IPs [192.168.122.21 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"[kubeconfig]Writing"admin.conf" kubeconfig file[kubeconfig]Writing"kubelet.conf" kubeconfig file[kubeconfig]Writing"controller-manager.conf" kubeconfig file[kubeconfig]Writing"scheduler.conf" kubeconfig file[control-plane]Using manifest folder "/etc/kubernetes/manifests"[control-plane]CreatingstaticPod manifest for"kube-apiserver"[control-plane]CreatingstaticPod manifest for"kube-controller-manager"
W0408 09:36:43.34319114098 manifests.go:225] the default kube-apiserver authorization-modeis"Node,RBAC";using"Node,RBAC"[control-plane]CreatingstaticPod manifest for"kube-scheduler"
W0408 09:36:43.34430314098 manifests.go:225] the default kube-apiserver authorization-mode is"Node,RBAC";using"Node,RBAC"[etcd]CreatingstaticPod manifest forlocal etcd in"/etc/kubernetes/manifests"[wait-control-plane]Waitingfor the kubelet to boot up the control plane asstaticPodsfrom directory "/etc/kubernetes/manifests".This can take up to 4m0s[apiclient]All control plane components are healthy after 23.002541 seconds
[upload-config]Storing the configuration used inConfigMap"kubeadm-config"in the "kube-system"Namespace[kubelet]Creating a ConfigMap"kubelet-config-1.18"innamespace kube-system with the configuration for the kubelets in the cluster
[upload-certs]Skipping phase.Please see --upload-certs[mark-control-plane]Marking the node master01.paas.com as control-plane by adding the label "node-role.kubernetes.io/master=‘‘"[mark-control-plane]Marking the node master01.paas.com as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule][bootstrap-token]Using token: v2r5a4.veazy2xhzetpktfz
[bootstrap-token]Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles[bootstrap-token] configured RBAC rules to allow NodeBootstrap tokens to get nodes
[bootstrap-token] configured RBAC rules to allow NodeBootstrap tokens to post CSRsin order for nodes to getlong term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRsfrom a NodeBootstrapToken[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token]Creating the "cluster-info"ConfigMapin the "kube-public"namespace[kubelet-finalize]Updating"/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons]Applied essential addon:CoreDNS[addons]Applied essential addon: kube-proxy

YourKubernetes control-plane has initialized successfully!Tostartusing your cluster, you need to run the followingas a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id-u):$(id-g) $HOME/.kube/config

You should now deploy a pod network to the cluster.Run"kubectl apply -f [podnetwork].yaml"with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/Then you can joinanynumberof worker nodes by running the followingoneachas root:

kubeadm join192.168.122.21:6443--token v2r5a4.veazy2xhzetpktfz \--discovery-token-ca-cert-hash sha256:daded8514c8350f7c238204979039ff9884d5b595ca950ba8bbce80724fd65d4[root@master01 ~]#

记录生成的最后部分内容，此内容需要在其它节点加入Kubernetes集群时执行。
根据提示创建kubectl

[root@master01 ~]#  mkdir -p $HOME/.kube
[root@master01 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@master01 ~]#   sudo chown $(id -u):$(id -g) $HOME/.kube/config

执行下面命令，使kubectl可以自动补充

[root@master01 ~]# source <(kubectl completion bash)

查看节点，pod

[root@master01 ~]# kubectl get node
NAME                STATUS     ROLES    AGE     VERSION
master01.paas.com   NotReady   master   2m29s   v1.18.0
[root@master01 ~]# kubectl get pod --all-namespaces
NAMESPACE     NAME                                        READY   STATUS    RESTARTS   AGE
kube-system   coredns-7ff77c879f-fsj9l                    0/1     Pending   0          2m12s
kube-system   coredns-7ff77c879f-q5ll2                    0/1     Pending   0          2m12s
kube-system   etcd-master01.paas.com                      1/1     Running   0          2m22s
kube-system   kube-apiserver-master01.paas.com            1/1     Running   0          2m22s
kube-system   kube-controller-manager-master01.paas.com   1/1     Running   0          2m22s
kube-system   kube-proxy-th472                            1/1     Running   0          2m12s
kube-system   kube-scheduler-master01.paas.com            1/1     Running   0          2m22s
[root@master01 ~]#

node节点为NotReady，因为corednspod没有启动，缺少网络pod

6 安装calico网络

[root@master01 ~]# kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node created
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers created

查看pod和node

[root@master01 ~]# kubectl get pod --all-namespaces
NAMESPACE     NAME                                        READY   STATUS    RESTARTS   AGE
kube-system   calico-kube-controllers-555fc8cc5c-k8rbk    1/1     Running   0          36s
kube-system   calico-node-5km27                           1/1     Running   0          36s
kube-system   coredns-7ff77c879f-fsj9l                    1/1     Running   0          5m22s
kube-system   coredns-7ff77c879f-q5ll2                    1/1     Running   0          5m22s
kube-system   etcd-master01.paas.com                      1/1     Running   0          5m32s
kube-system   kube-apiserver-master01.paas.com            1/1     Running   0          5m32s
kube-system   kube-controller-manager-master01.paas.com   1/1     Running   0          5m32s
kube-system   kube-proxy-th472                            1/1     Running   0          5m22s
kube-system   kube-scheduler-master01.paas.com            1/1     Running   0          5m32s
[root@master01 ~]# kubectl get node
NAME                STATUS   ROLES    AGE     VERSION
master01.paas.com   Ready    master   5m47s   v1.18.0
[root@master01 ~]#

此时集群状态正常

7 安装kubernetes-dashboard

官方部署dashboard的服务没使用nodeport，将yaml文件下载到本地，在service里添加nodeport

[root@master01 ~]# wget  https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-rc7/aio/deploy/recommended.yaml
[root@master01 ~]# vim recommended.yaml
kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  type: NodePort
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 30000
  selector:
    k8s-app: kubernetes-dashboard

[root@master01 ~]# kubectl create -f recommended.yaml
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created

查看pod，service

NAME                                        READY   STATUS    RESTARTS   AGE
dashboard-metrics-scraper-dc6947fbf-869kf   1/1     Running   0          37s
kubernetes-dashboard-5d4dc8b976-sdxxt       1/1     Running   0          37s
[root@master01 ~]# kubectl get svc -n kubernetes-dashboard
NAME                        TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)         AGE
dashboard-metrics-scraper   ClusterIP   10.10.58.93    <none>        8000/TCP        44s
kubernetes-dashboard        NodePort    10.10.132.66   <none>        443:30000/TCP   44s
[root@master01 ~]#

通过页面访问，推荐使用firefox浏览器

使用token进行登录，执行下面命令获取token

[root@master01 ~]# kubectl describe secrets -n kubernetes-dashboard kubernetes-dashboard-token-t4hxz  | grep token | awk ‘NR==3{print $2}‘
eyJhbGciOiJSUzI1NiIsImtpZCI6IlhJaDgyTWEzZ3FtWE9hTnJqUHN1akdHZU1pRHN3QWM2RUlQbUVOT0g0Qm8ifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJrdWJlcm5ldGVzLWRhc2hib2FyZC10b2tlbi10NGh4eiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50LnVpZCI6ImUxOWYwMGI5LTI3MWItNDY5OS1hMjI3LTAzZWEyZTllMDE4YiIsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlcm5ldGVzLWRhc2hib2FyZDprdWJlcm5ldGVzLWRhc2hib2FyZCJ9.Mcw9zYSbTfhaYV38vlEaI0CSomYLtb05F2AIGpyT_PjIN8xmRdnIQhWGANBDuuDjdxScSXHOytHAKdj3pzBFVw_lfU5PseBg6hmdv_EPFPh2GvRd9XCs0TE5CVX8qfHkAGKc-DltA7jPwt5VqIFjnolLLGXB-exhiU73YMG_Xy9dZE-u0KKCvSq7XZDR87P_X30JYCAZXDlxcv8iOsuI4I-wlacm6LRF6HgyJqctJNVyE7seVVIgLqetAtt9LicTo6BBozbefHeK6zqRYeITU8AHhe-PLS4xo2fey5up77v4vyPHy_SEnKOtZcBzje1XKNPolGfiXItLYF7u95m9_A

登录后如下展示，如果没有namespace可选，并且提示找不到资源 ，那么就是权限问题

通过查看dashboard日志，得到如下 信息

[root@master01 ~]# kubectl logs -f -n kubernetes-dashboard kubernetes-dashboard-5d4dc8b976-sdxxt
2020/04/08 01:54:31 Non-critical error occurred during resource retrieval: namespaces is forbidden: User "system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "namespaces" in API group "" at the cluster scope
2020/04/08 01:54:31 [2020-04-08T01:54:31Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 01:54:31 [2020-04-08T01:54:31Z] Incoming HTTP/2.0 GET /api/v1/cronjob/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from 192.168.122.21:7788:
2020/04/08 01:54:31 Getting list of all cron jobs in the cluster
2020/04/08 01:54:31 Non-critical error occurred during resource retrieval: cronjobs.batch is forbidden: User "system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "cronjobs" in API group "batch" in the namespace "default"
2020/04/08 01:54:31 [2020-04-08T01:54:31Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 01:54:31 [2020-04-08T01:54:31Z] Incoming HTTP/2.0 POST /api/v1/token/refresh request from 192.168.122.21:7788: { contents hidden }
2020/04/08 01:54:31 [2020-04-08T01:54:31Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 01:54:31 [2020-04-08T01:54:31Z] Incoming HTTP/2.0 GET /api/v1/daemonset/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0801:54:31[2020-04-08T01:54:31Z]Incoming HTTP/2.0 GET /api/v1/deployment/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0801:54:31Non-critical error occurred during resource retrieval: daemonsets.apps is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "daemonsets"in API group"apps"in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: pods is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "pods"in API group""in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: events is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "events"in API group""in the namespace"default"2020/04/0801:54:31[2020-04-08T01:54:31Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0801:54:31[2020-04-08T01:54:31Z]Incoming HTTP/2.0 GET /api/v1/csrftoken/token request from192.168.122.21:7788:2020/04/0801:54:31[2020-04-08T01:54:31Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0801:54:31Getting list of all deployments in the cluster
2020/04/0801:54:31Non-critical error occurred during resource retrieval: deployments.apps is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "deployments"in API group"apps"in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: pods is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "pods"in API group""in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: events is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "events"in API group""in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: replicasets.apps is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "replicasets"in API group"apps"in the namespace"default"2020/04/0801:54:31[2020-04-08T01:54:31Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0801:54:31[2020-04-08T01:54:31Z]Incoming HTTP/2.0 GET /api/v1/job/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0801:54:31[2020-04-08T01:54:31Z]Incoming HTTP/2.0 GET /api/v1/pod/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0801:54:31Getting list of all jobs in the cluster
2020/04/0801:54:31Non-critical error occurred during resource retrieval: jobs.batch is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "jobs"in API group"batch"in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: pods is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "pods"in API group""in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: events is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "events"in API group""in the namespace"default"2020/04/0801:54:31[2020-04-08T01:54:31Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0801:54:31Getting list of all pods in the cluster
2020/04/0801:54:31Non-critical error occurred during resource retrieval: pods is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "pods"in API group""in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: events is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "events"in API group""in the namespace"default"2020/04/0801:54:31Getting pod metrics
2020/04/0801:54:31[2020-04-08T01:54:31Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0801:54:31[2020-04-08T01:54:31Z]Incoming HTTP/2.0 GET /api/v1/replicaset/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0801:54:31Getting list of all replica sets in the cluster
2020/04/0801:54:31[2020-04-08T01:54:31Z]Incoming HTTP/2.0 GET /api/v1/replicationcontroller/default?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0801:54:31Non-critical error occurred during resource retrieval: replicasets.apps is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "replicasets"in API group"apps"in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: pods is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "pods"in API group""in the namespace"default"2020/04/0801:54:31Non-critical error occurred during resource retrieval: events is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "events"in API group""in the namespace"default"2020/04/0801:54:31[2020-04-08T01:54:31Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0801:54:31Getting list of all replication controllers in the cluster
2020/04/0801:54:31Non-critical error occurred during resource retrieval: replicationcontrollers is forbidden:User"system:serviceaccount:kubernetes-dashboard:kubernetes-dashboard" cannot list resource "replicationcontrollers"in API group""in the namespace"default"

解决方法

[root@master01 ~]# kubectl create clusterrolebinding serviceaccount-cluster-admin --clusterrole=cluster-admin --group=system:serviceaccount 
clusterrolebinding.rbac.authorization.k8s.io/serviceaccount-cluster-admin created

查看dashboard日志

[root@master01 ~]# kubectl logs -f -n kubernetes-dashboard kubernetes-dashboard-5d4dc8b976-sdxx
2020/04/08 02:07:03 Getting list of namespaces
2020/04/08 02:07:03 [2020-04-08T02:07:03Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 02:07:08 [2020-04-08T02:07:08Z] Incoming HTTP/2.0 GET /api/v1/node?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from 192.168.122.21:7788:
2020/04/08 02:07:08 [2020-04-08T02:07:08Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 02:07:08 [2020-04-08T02:07:08Z] Incoming HTTP/2.0 GET /api/v1/namespace request from 192.168.122.21:7788:
2020/04/08 02:07:08 Getting list of namespaces
2020/04/08 02:07:08 [2020-04-08T02:07:08Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 02:07:13 [2020-04-08T02:07:13Z] Incoming HTTP/2.0 GET /api/v1/node?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from 192.168.122.21:7788:
2020/04/08 02:07:13 [2020-04-08T02:07:13Z] Outcoming response to 192.168.122.21:7788 with 200 status code
2020/04/08 02:07:13[2020-04-08T02:07:13Z]Incoming HTTP/2.0 GET /api/v1/namespace request from192.168.122.21:7788:2020/04/0802:07:13Getting list of namespaces
2020/04/0802:07:13[2020-04-08T02:07:13Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:18[2020-04-08T02:07:18Z]Incoming HTTP/2.0 GET /api/v1/node?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0802:07:18[2020-04-08T02:07:18Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:18[2020-04-08T02:07:18Z]Incoming HTTP/2.0 GET /api/v1/namespace request from192.168.122.21:7788:2020/04/0802:07:18Getting list of namespaces
2020/04/0802:07:18[2020-04-08T02:07:18Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:23[2020-04-08T02:07:23Z]Incoming HTTP/2.0 GET /api/v1/node?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0802:07:23[2020-04-08T02:07:23Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:23[2020-04-08T02:07:23Z]Incoming HTTP/2.0 GET /api/v1/namespace request from192.168.122.21:7788:2020/04/0802:07:23Getting list of namespaces
2020/04/0802:07:23[2020-04-08T02:07:23Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:28[2020-04-08T02:07:28Z]Incoming HTTP/2.0 GET /api/v1/node?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0802:07:28[2020-04-08T02:07:28Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:28[2020-04-08T02:07:28Z]Incoming HTTP/2.0 GET /api/v1/namespace request from192.168.122.21:7788:2020/04/0802:07:28Getting list of namespaces
2020/04/0802:07:28[2020-04-08T02:07:28Z]Outcoming response to 192.168.122.21:7788with200 status code
2020/04/0802:07:33[2020-04-08T02:07:33Z]Incoming HTTP/2.0 GET /api/v1/node?itemsPerPage=10&page=1&sortBy=d,creationTimestamp request from192.168.122.21:7788:2020/04/0802:07:33[2020-04-08T02:07:33Z]Outcoming response to 192.168.122.21:7788with200 status code

此时再查看dashboard，即可看到有资源展示

使用kubeadm在Centos8上部署kubernetes1.18

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原文地址：https://www.cnblogs.com/guarderming/p/12876833.html