免费网站建设360,沙坪坝网站建设公司选哪家好,新建的网站怎么上首页,好的h5网站模板文章目录 测试环境kubernetes安装环境配置安装程序下载镜像初始化reset环境init构建kubernetes配置授权信息配置网络插件查看状态 简单实例测试 测试环境
[rootlocalhost ~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)kubernetes安装
参考kuberneter文档… 文章目录 测试环境kubernetes安装环境配置安装程序下载镜像初始化reset环境init构建kubernetes配置授权信息配置网络插件查看状态 简单实例测试 测试环境
[rootlocalhost ~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)kubernetes安装
参考kuberneter文档
加入节点到当前kubernetes集群可根据上述文档加入
环境配置
swapoff -a
setenforce 0
rm -rf $HOME/.kube #已安装过安装程序
#安装docker
yum install docker -y#安装kubeadm、kubectl
#添加下载源
cat EOF /etc/yum.repos.d/kubernetes.repo
[kubernetes]
nameKubernetes
baseurlhttps://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled1
gpgcheck1
repo_gpgcheck1
gpgkeyhttps://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF# 安装指定版本的kubeadm kubectl kubelet
# 查询所有版本yum list available kubeadm --showduplicates
# 比如此处安装1.23.0的kubernetes, 需要安装对应的版本
# 否则会报错, 如:
# this version of kubeadm only supports deploying clusters with the control plane version 1.27.0. Current version: v1.23.0
yum install kubeadm-1.23.0-0 kubectl-1.23.0-0 kubelet-1.23.0-0 -y下载镜像
#使用kubeadm初始化Master节点
#执行命令下列命令查看需要下载的docker镜像及相应版本这里的名字必须与后面的docker images中显示的名字一样否则初始化时会失败
kubeadm config images list#生成脚本并将其中的版本信息填入到下列脚本
cat EOF download.sh
#!/bin/bash
set -eKUBE_VERSIONv1.23.0
KUBE_PAUSE_VERSION3.6
ETCD_VERSION3.5.1-0
CORE_DNS_VERSIONv1.8.6GCR_URLk8s.gcr.io
ALIYUN_URLregistry.cn-hangzhou.aliyuncs.com/google_containersimages(kube-proxy:${KUBE_VERSION}kube-scheduler:${KUBE_VERSION}kube-controller-manager:${KUBE_VERSION}kube-apiserver:${KUBE_VERSION}pause:${KUBE_PAUSE_VERSION}etcd:${ETCD_VERSION}coredns:${CORE_DNS_VERSION}
)for imageName in ${images[]} ; dodocker pull ${ALIYUN_URL}/$imageNamedocker tag ${ALIYUN_URL}/$imageName ${GCR_URL}/$imageNamedocker rmi ${ALIYUN_URL}/$imageName
done
# 额外tag一下
docker tag ${GCR_URL}/coredns:v1.8.6 ${GCR_URL}/coredns/coredns:v1.8.6
EOF初始化
reset环境
# 如果安装过则进行reset
kubeadm resetinit构建kubernetes
#使用如下命令查看初始化时的默认配置
kubeadm config print init-defaults init.yaml
#初始化#可根据需要修改上一步获取到的配置如修改kubernetes版本以及其它ip等配置
kubeadm init --configinit.yaml# 建议直接使用此命令
kubeadm init --kubernetes-version1.23.0 --node-namemaster异常分析
这一步骤容易出现错误可以根据提示进行分析kubeadm init增加参数–v5可以查看详细信息如果这里还没有找到问题原因则通过journalctl -xeu kubelet查找问题
cgroup driver报错
# error: Failed to run kubelet errfailed to run Kubelet: misconfiguration: kubelet cgroup driver: \systemd\ is different from docker cgroup driver: \cgroupfs\# 创建配置文件 kubeadm-config.yaml, 并配置version和cgroupDriver
kind: ClusterConfiguration
apiVersion: kubeadm.k8s.io/v1beta3
kubernetesVersion: v1.23.0
---
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: cgroupfs# kubeadm reset后重新kubeadm init
kubeadm init --configkubeadm-config.yaml配置授权信息
上一步完成后会有提示可根据提示配置授权信息 也可加入worker节点到集群 提示信息
Your Kubernetes control-plane has initialized successfully!To start using your cluster, you need to run the following as a regular user:mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown $(id -u):$(id -g) $HOME/.kube/configAlternatively, if you are the root user, you can run:export KUBECONFIG/etc/kubernetes/admin.confYou 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 join any number of worker nodes by running the following on each as root:kubeadm join 172.20.20.114:6443 --token s8qj24.jken8zoqh8hqhneq \--discovery-token-ca-cert-hash sha256:dd5f58c9ad1113daf894c79a61cadd67ded2c89ee99611ebd4f7e50dc3d89658
如果忘记token和sha256可通过命令查询
# 查询token
kubeadm token list
# sha256
openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2/dev/null | openssl dgst -sha256 -hex | sed s/^.* //配置网络插件
参考kuberneter文档
# 下载也可以用wget https://raw.githubusercontent.com/projectcalico/calico/v3.27.3/manifests/calico.yaml
curl https://raw.githubusercontent.com/projectcalico/calico/v3.27.3/manifests/calico.yaml -O
# apply
kubectl apply -f calico.yaml查看状态
上一步会去拉镜像等操作可能需要一些时间
#查看是否安装成功默认生成namespace kube-system
[rootlocalhost kubernetes]# kubectl get po -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-5bd579bf9c-9j8nx 1/1 Running 0 3m3s
kube-system calico-node-7b2cv 1/1 Running 0 3m3s
kube-system coredns-64897985d-lrsg4 1/1 Running 0 15m
kube-system coredns-64897985d-qkjdz 1/1 Running 0 15m
kube-system etcd-master 1/1 Running 0 15m
kube-system kube-apiserver-master 1/1 Running 0 15m
kube-system kube-controller-manager-master 1/1 Running 0 15m
kube-system kube-proxy-hgktb 1/1 Running 0 15m
kube-system kube-scheduler-master 1/1 Running 0 15m
# node ready
[rootlocalhost kubernetes]# kubectl get node
NAME STATUS ROLES AGE VERSION
master Ready control-plane,master 26m v1.23.0简单实例测试
由于上一步只是创建了一个节点即只有一个主节点kubernetes默认时不再master上运行pod的所以需要先配置一下允许在master上运行pod
#单节点设置master节点也可以运行Podkubernetes官方默认策略是worker节点运行Podmaster节点不运行Pod。如果只是为了开发或者其他目的而需要部署单节点集群可以通过以下的命令设置
kubectl taint nodes --all node-role.kubernetes.io/master-
#kubectl taint node master node-role.kubernetes.io/master:NoSchedule #将 Master 恢复成 Master Only 状态创建nginx-deployment控制器yaml文件
cat EOF nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-deploymentlabels:app: nginx
spec:replicas: 1selector:matchLabels:app: nginxtemplate:metadata:labels:app: nginxspec:containers:- name: nginximage: nginx:1.15.4ports:- containerPort: 80
EOF创建nginx-service服务yaml文件
cat EOF nginx-service.yaml
apiVersion: v1
kind: Service
metadata:name: nginx-servicelabels:app: nginx
spec:type: NodePortports:- port: 80targetPort: 80nodePort: 30949selector:app: nginx
EOF根据已创建的yaml文件生成deployment、service这里由于未指定命名空间所有都在default命名空间创建若在其他空间创建的可以增加参数-n
kubectl apply -f nginx-deployment.yaml
kubectl apply -f nginx-service.yaml查看是否成功
kubectl get svc -n default
kubectl get deploy
kubectl get pod结果示例
[rootlocalhost ~]# kubectl get svc -n default
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 none 443/TCP 2d3h
nginx-service NodePort 10.97.200.51 none 80:30949/TCP 101s
[rootlocalhost ~]# kubectl get deploy -n default
NAME READY UP-TO-DATE AVAILABLE AGE
nginx-deployment 1/1 1 1 2m11s
[rootlocalhost ~]# kubectl get pod -n default
NAME READY STATUS RESTARTS AGE
nginx-deployment-746ccc65d8-pwcqb 1/1 Running 0 2m13s可根据上述生成的nginx-service.yaml中的nodePort得到服务开放端口30949然后通过如下命令访问
[rootlocalhost ~]# curl localhost:30949
!DOCTYPE html
html
head
titleWelcome to nginx!/title
stylebody {width: 35em;margin: 0 auto;font-family: Tahoma, Verdana, Arial, sans-serif;}
/style
/head
body
h1Welcome to nginx!/h1
pIf you see this page, the nginx web server is successfully installed and
working. Further configuration is required./ppFor online documentation and support please refer to
a hrefhttp://nginx.org/nginx.org/a.br/
Commercial support is available at
a hrefhttp://nginx.com/nginx.com/a./ppemThank you for using nginx./em/p
/body
/html查看pod日志根据命令kubectl get pod -n default查看pod名字然后使用 kubectl -n default logs -f 查看日志
[rootlocalhost ~]# kubectl get pod -n default
NAME READY STATUS RESTARTS AGE
nginx-deployment-746ccc65d8-pwcqb 1/1 Running 0 8m12s
[rootlocalhost ~]# kubectl -n default logs -f nginx-deployment-746ccc65d8-pwcqb
