gotok8s
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Published
20 hours ago •
maguowei
maguowei
Goto Kubernetes
Goto Kubernetes
安装 Kubernetes
对于
Mac用户可以参考: k8s-docker-desktop-for-mac, 通过Docker Desktop for Mac开启和使用 Kubernetes
$ curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
# root（sudo -i)
# Debian/Ubuntu
apt-get update && apt-get install -y apt-transport-https
curl -s https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
apt-get update
apt-get install -y kubelet kubeadm kubectl
# CentOS/RHEL/Fedora
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
setenforce 0
yum install -y kubelet kubeadm kubectl
- 使用
kubeadm创建Kubernetes集群
# 确保关闭交换空间(running with swap on is not supported. Please disable swap)
$ sudo swapoff -a
# 永久关闭需要编辑 `/etc/fstab` 注释掉 `swap` 所在行
# 获取最新 Kubernetes 版本号
$ KUBERNETES_RELEASE_VERSION="$(curl -sSL https://dl.k8s.io/release/stable.txt)"
# 可以用下面的命令列出 kubeadm 需要的 images
$ kubeadm config images list --kubernetes-version=${KUBERNETES_RELEASE_VERSION}
# 提前拉取所需的镜像
$ docker pull gotok8s/coredns:v1.8.6 && docker tag gotok8s/coredns:v1.8.6 gotok8s/coredns/coredns:v1.8.6
$ kubeadm config images pull --config init.yml
# 集群初始化（init.yml文件中配置了使用阿里的镜像仓库）
$ sudo kubeadm init --config init.yml
# 或者执行(忽略Docker版本检查)
$ sudo kubeadm init --config init.yml --ignore-preflight-errors=SystemVerification
# KUBECONFIG 设置
$ mkdir -p $HOME/.kube
$ sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
$ sudo chown $(id -u):$(id -g) $HOME/.kube/config
# 使用 `flannel` 网络
$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
# Master Isolation (if single-machine Kubernetes cluster )
$ kubectl taint nodes --all node-role.kubernetes.io/master-
Kubernetes Dashboard
部署 Kubernetes Dashboard
$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/aio/deploy/recommended.yaml
# 开启本机访问代理
$ kubectl proxy
创建Dashboard管理员用户并用token登陆
# 创建 ServiceAccount kubernetes-dashboard-admin 并绑定集群管理员权限
$ kubectl apply -f https://raw.githubusercontent.com/gotok8s/gotok8s/master/dashboard-admin.yaml
# 获取登陆 token
$ kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep kubernetes-dashboard-admin | awk '{print $1}')
通过下面的连接访问 Dashboard: http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/
输入上一步获取的token, 验证并登陆。
Helm
安装
详细使用说明请参考 Helm官方文档
# Linux 用户
$ curl -s https://get.helm.sh/helm-v3.8.1-linux-amd64.tar.gz | tar xzv
$ sudo cp linux-amd64/helm /usr/local/bin
$ rm -rf linux-amd64
# Mac 用户
$ brew install helm
使用
# 添加 charts repo
$ helm repo add bitnami https://charts.bitnami.com/bitnami
# 测试安装 redis chart
$ helm install my-redis bitnami/redis
# 删除 redis
$ helm uninstall my-redis
NGINX Ingress
# install by helm
$ helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
$ helm repo update
$ helm install ingress-nginx ingress-nginx/ingress-nginx
Istio
下载并安装 Istio
$ curl -L https://istio.io/downloadIstio | sh -
# 进入下载的文件夹，这里以 `istio-1.9.0` 为例
$ cd istio-1.11.4
$ export PATH=$PWD/bin:$PATH
# 安装
$ istioctl install --set profile=demo -y
# 设置自动注入 Envoy sidecar proxies
$ kubectl label namespace default istio-injection=enabled
部署示例
# 部署
$ kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml
# 查看示例返回
$ kubectl exec -it $(kubectl get pod -l app=ratings -o jsonpath='{.items[0].metadata.name}') -c ratings -- curl productpage:9080/productpage | grep -o "<title>.*</title>"
升级 Kubernetes 版本
# 修改 `init.yml` 中 `kubernetesVersion` 版本号， 执行
sudo kubeadm upgrade apply --config init.yml --ignore-preflight-errors=SystemVerification
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