2019-07-18 00:32:57 +08:00
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# Docker Swarm 集群搭建
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2019-06-29 09:28:08 +08:00
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现阶段,Docker容器技术已经相当成熟,就算是中小型公司也可以基于 Gitlab、Aliyun镜像服务、Docker Swarm 轻松搭建自己的 Docker集群服务。
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## 安装 Docker
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```
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curl -sSL https://get.daocloud.io/docker | sh
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```
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## 搭建自己的Gitlab
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### 安装Gitlab
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2019-06-29 10:30:40 +08:00
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首先我们修改一下端口号,把 `sshd` 服务的 `22` 端口改为 `2222`,让 `gitlab` 可以使用 `22` 端口。
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2019-06-29 09:28:08 +08:00
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```
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$ vim /etc/ssh/sshd_config
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# 默认 Port 改为 2222
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Port 2222
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# 重启服务
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$ systemctl restart sshd.service
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```
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重新登录机器
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```
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ssh -p 2222 root@host
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```
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安装 Gitlab
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```
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sudo docker run -d --hostname gitlab.xxx.cn \
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--publish 443:443 --publish 80:80 --publish 22:22 \
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--name gitlab --restart always --volume /srv/gitlab/config:/etc/gitlab \
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--volume /srv/gitlab/logs:/var/log/gitlab \
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--volume /srv/gitlab/data:/var/opt/gitlab \
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gitlab/gitlab-ce:latest
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```
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首次登录 `Gitlab` 会重置密码,用户名是 `root`。
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### 安装gitlab-runner
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[官方地址](https://docs.gitlab.com/runner/install/linux-repository.html)
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2019-06-29 09:52:36 +08:00
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以 `CentOS` 为例
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```
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curl -L https://packages.gitlab.com/install/repositories/runner/gitlab-runner/script.rpm.sh | sudo bash
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yum install gitlab-runner
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```
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当然,可以用 `curl https://setup.ius.io | sh` 命令,更新为最新的 `git` 源,然后直接使用 yum 安装 git 和 gitlab-runner。
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```
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$ curl https://setup.ius.io | sh
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$ yum -y install git2u
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$ git version
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$ yum install gitlab-runner
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```
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2019-06-29 09:28:08 +08:00
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### 注册 gitlab-runner
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```
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$ gitlab-runner register --clone-url http://内网ip/
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Please enter the gitlab-ci coordinator URL (e.g. https://gitlab.com/):
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http://gitlab.xxx.cc/
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Please enter the gitlab-ci token for this runner:
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xxxxx
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Please enter the gitlab-ci description for this runner:
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xxx
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Please enter the gitlab-ci tags for this runner (comma separated):
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builder
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Please enter the executor: docker-ssh, shell, docker+machine, docker-ssh+machine, docker, parallels, ssh, virtualbox, kubernetes:
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shell
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```
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2019-07-21 14:28:23 +08:00
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### 修改 gitlab-runner 并发执行个数
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```
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$ vim /etc/gitlab-runner/config.toml
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concurrent = 5
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```
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2019-06-29 09:28:08 +08:00
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## 初始化 Swarm 集群
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2019-06-29 09:32:54 +08:00
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登录另外一台机器,初始化集群
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2019-06-29 09:28:08 +08:00
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```
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$ docker swarm init
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```
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创建自定义 Overlay 网络
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```
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docker network create \
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--driver overlay \
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--subnet 10.0.0.0/24 \
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--opt encrypted \
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default-network
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```
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加入集群
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```
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# 显示manager节点的TOKEN
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$ docker swarm join-token manager
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# 加入manager节点到集群
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$ docker swarm join --token <token> ip:2377
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# 显示worker节点的TOKEN
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$ docker swarm join-token worker
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# 加入worker节点到集群
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$ docker swarm join --token <token> ip:2377
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```
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然后配置发布用的 gitlab-runner
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> 其他与 builder 一致,但是 tag 却不能一样。线上环境可以设置为 tags,测试环境设置为 test
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## 安装 Portainer
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[Portainer](https://github.com/portainer/portainer)
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```
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docker service create \
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--name portainer \
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--publish 9000:9000 \
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--replicas=1 \
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--constraint 'node.role == manager' \
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--mount type=volume,src=portainer_data,dst=/data \
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--mount type=bind,src=//var/run/docker.sock,dst=/var/run/docker.sock \
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portainer/portainer
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```
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## 创建一个Demo项目
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登录 Gitlab 创建一个 Demo 项目。并导入我们的项目 [hyperf-skeleton](https://github.com/hyperf-cloud/hyperf-skeleton)
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## 配置镜像仓库
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> 我们直接使用阿里云的即可
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首先创建一个命名空间 test_namespace,然后创建一个镜像仓库 demo,并使用本地仓库。
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然后到我们直接打包用的服务器中,登录阿里云 Docker Registry
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```
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usermod -aG docker gitlab-runner
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su gitlab-runner
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docker login --username=your_name registry.cn-shanghai.aliyuncs.com
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```
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修改我们项目里的 .gitlab-ci.yml
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```
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variables:
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PROJECT_NAME: demo
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REGISTRY_URL: registry.cn-shanghai.aliyuncs.com/test_namespace
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```
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还有 deploy.test.yml,需要仔细对比以下文件哦。
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```yml
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version: '3.7'
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services:
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demo:
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image: $REGISTRY_URL/$PROJECT_NAME:test
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environment:
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- "APP_PROJECT=demo"
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- "APP_ENV=test"
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ports:
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- 9501:9501
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deploy:
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replicas: 1
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restart_policy:
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condition: on-failure
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delay: 5s
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max_attempts: 5
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update_config:
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parallelism: 2
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delay: 5s
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order: start-first
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networks:
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- default-network
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configs:
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- source: demo_v1.0
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target: /opt/www/.env
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configs:
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demo_v1.0:
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external: true
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networks:
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default-network:
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external: true
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```
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然后在我们的 portainer 中,创建对应的 Config demo_v1.0。当然,以下参数需要根据实际情况调整,因为我们的Demo中,没有任何IO操作,所以填默认的即可。
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```
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APP_NAME=demo
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DB_DRIVER=mysql
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DB_HOST=localhost
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DB_PORT=3306
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DB_DATABASE=hyperf
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DB_USERNAME=root
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DB_PASSWORD=
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DB_CHARSET=utf8mb4
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DB_COLLATION=utf8mb4_unicode_ci
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DB_PREFIX=
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REDIS_HOST=localhost
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REDIS_AUTH=
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REDIS_PORT=6379
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REDIS_DB=0
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```
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因为我们配置的 gitlab-ci.yml 会检测 test 分支和 tags,所以我们把修改的内容合并到test分支,然后推到gitlab上。
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接下来我们就可以访问集群任意一台机器的 9501 端口。进行测试了
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```
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curl http://127.0.0.1:9501/
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```
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## 意外情况
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### fatal: git fetch-pack: expected shallow list
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这种情况是 `gitlab-runner` 使用的 `git` 版本过低,更新 `git` 版本即可。
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```
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$ curl https://setup.ius.io | sh
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$ yum remove -y git
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$ yum -y install git2u
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$ git version
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# 重新安装 gitlab-runner 并重新注册 gitlab-runner
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$ yum install gitlab-runner
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```
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