15分钟在阿里云Kubernetes服务上快速建立Jenkins X Platform并运用GitOps管理应用发布

本文主要介绍如何在阿里云容器服务Kubernetes上快速安装部署Jenkins X Platform并结合demo实践演示GitOps的操作流程。

注意：
本文中使用的jx工具、cloud-environments等做过改造用以适配阿里云Kubernetes容器服务，并未在自建Kubernetes集群中做过验证。

先决条件：
首先，需要在 阿里云容器服务控制台 创建一个Kubernetes集群，本次实践使用的环境信息如下：
master1 192.168.0.119
master2 192.168.0.120
master3 192.168.0.121
worker1 192.168.0.122
jx-node 192.168.0.123

一、 部署Jenkins X Platform并创建Staging Production Env

1. kubectl 、helm、git和jx的安装以及初始化

$ scp 192.168.0.119:/usr/bin/kubectl /usr/bin/kubectl
$ scp 192.168.0.119:/usr/local/bin/helm /usr/local/bin/helm
$ mkdir -p $HOME/.kube

将容器服务控制台上显示的kubeconfig文件内容复制到计算机 $HOME/.kube/config

初始化Helm Client：

$ helm init --client-only --stable-repo-url https://aliacs-app-catalog.oss-cn-hangzhou.aliyuncs.com/charts-incubator/
$ helm repo update

安装git

$ yum install git -y

安装jx

$ wget http://acs-jenkins-x.oss-cn-beijing.aliyuncs.com/v1.3.699/jx && mv jx /usr/local/bin/ && chmod +x /usr/local/bin/jx

验证jx：(注意不要选择升级，jx做了定制化修改，目前版本1.3.699)

$ jx version
Error loading team settings. the server could not find the requested resource (get environments.jenkins.io)
Error loading team settings. the server could not find the requested resource (get environments.jenkins.io)
Failed to get git version: failed to run 'git version' command in directory '', output: '': exec: "git": executable file not found in $PATH
NAME               VERSION
jx                 1.3.699
Kubernetes cluster v1.11.5
kubectl            v1.11.5
helm client        v2.11.0+g2e55dbe
helm server        v2.11.0+g2e55dbe
Operating System   "CentOS Linux release 7.4.1708 (Core) "

A new jx version is available: 1.3.736
? Would you like to upgrade to the new jx version? No

2. 安装jenkins-x-platform

$ mkdir -p ~/.jx
$ cd ~/.jx
$ jx install --provider=kubernetes \
             --domain aliyunk8s-bj.com \
             --ingress-deployment=nginx-ingress-controller \
             --ingress-service=nginx-ingress-lb  \
             --cloud-environment-repo=https://github.com/AliyunContainerService/cloud-environments.git \
             --no-tiller=true \
             --no-default-environments=true

交互及日志输出如下：

Namespace jx created
 Using helmBinary helm with feature flag: none
Context "kubernetes-admin-ccf3ebc497d9e4083aab8c89bb1b217bc" modified.
Storing the kubernetes provider kubernetes in the TeamSettings
Enabling helm template mode in the TeamSettings
? Please enter the name you wish to use with git:  jenkins-x-bot
? Please enter the email address you wish to use with git:  haoshuwei24@gmail.com
Git configured for user: jenkins-x-bot and email haoshuwei24@gmail.com
Trying to create ClusterRoleBinding kubernetes-admin-cluster-admin-binding for role: cluster-admin for user kubernetes-admin
 clusterrolebindings.rbac.authorization.k8s.io "kubernetes-admin-cluster-admin-binding" not found
Created ClusterRoleBinding kubernetes-admin-cluster-admin-binding
Using helm2
Skipping tiller
helm installed and configured
existing ingress controller found, no need to install a new one
Waiting for external loadbalancer to be created and update the nginx-ingress-controller service in kube-system namespace
External loadbalancer created
Waiting to find the external host name of the ingress controller Service in namespace kube-system with name nginx-ingress-lb
If you are installing Jenkins X on premise you may want to use the '--on-premise' flag or specify the '--external-ip' flags. See: https://jenkins-x.io/getting-started/install-on-cluster/#installing-jenkins-x-on-premise
You can now configure your wildcard DNS aliyunk8s-bj.com to point to 39.97.21.40
nginx ingress controller installed and configured
Lets set up a Git user name and API token to be able to perform CI/CD

Creating a local Git user for GitHub server
? GitHub user name: jenkins-x-bot
To be able to create a repository on GitHub we need an API Token
Please click this URL https://github.com/settings/tokens/new?scopes=repo,read:user,read:org,user:email,write:repo_hook,delete_repo

Then COPY the token and enter in into the form below:

? API Token: ****************************************
Select the CI/CD pipelines Git server and user
? Do you wish to use GitHub as the pipelines Git server: Yes
? Do you wish to use jenkins-x-bot as the pipelines Git user for GitHub server: Yes
Set