Rancher容器管理平台搭建

环境准备

Docker私服及docker初体验

一般来说，直接通过一条命令就可以直接安装并启动rancher了:docker run -d --restart=always -v /data/rancher_server:/var/lib/mysql -p 8080:8080 rancher/server。第一次运行比较慢，因为要生成初始化很多数据。

命令简介

--restart 表示重启策略，这里设置的是always，意思是当docker服务重启的时候，此容器也重启。其选项如下：

no，默认策略，在容器退出时不重启容器

on-failure，在容器非正常退出时（退出状态非0），才会重启容器

on-failure:3，在容器非正常退出时重启容器，最多重启3次

always，在容器退出时总是重启容器

unless-stopped，在容器退出时总是重启容器，但是不考虑在Docker守护进程启动时就已经停止了的容器

-v是挂载命令，其中/data/rancher_server是宿主机目录，而/var/lib/mysql是容器内目录；

-p是端口映射，rancher默认端口是8080，冒号前面的是宿主机端口，后面的是容器对应的端口。

版本选择

TagDescriptionrancher/rancher:latest最新的开发版本，通过我们的CI自动化框架进行构建，该版本不推荐用于生产环境。rancher/rancher:stable最新的稳定版本，该版本被推荐用于生产。rancher/rancher:<v2.X.X>可以通过明确指定镜像版本标签来安装特定的Rancher server版本。

使用外部MySQL数据库

除了使用内部数据库外，还提供了一些额外的参数去连接外部数据库。

docker run -d --restart=unless-stopped -p 8080:8080 rancher/server \ --db-host 192.168.196.196 --db-port 3306 --db-user username --db-pass password --db-name cattle

大部分的输入参数都有默认值并且是可选的，只有MySQL数据库主机地址配置项是必须配置的。

--db-host #数据库主机名或IP地址 --db-port #数据库服务端口(默认为:3306) --db-user #数据库用户名(默认为:cattle) --db-pass #数据库用户密码(默认为:cattle) --db-name #数据库名(默认为:cattle)

配置

切换语言

管理员

主机

将复制的命令直接在准备添加的主机上执行。

我这边出现了如下错误：

Unable to find image 'rancher/agent:v1.2.11' locally v1.2.11: Pulling from rancher/agent b3e1c725a85f: Pull complete 6a710864a9fc: Pull complete d0ac3b234321: Pull complete 87f567b5cf58: Pull complete 063e24b217c4: Pull complete d0a3f58caef0: Pull complete 16914729cfd3: Pull complete bbad862633b9: Pull complete 3cf9849d7f3c: Pull complete Digest: sha256:0fba3fb10108f7821596dc5ad4bfa30e93426d034cd3471f6ccd3afb5f87a963 Status: Downloaded newer image for rancher/agent:v1.2.11 INFO: Running Agent Registration Process, CATTLE_URL=http://192.168.196.196:8080/v1 INFO: Attempting to connect to: http://192.168.196.196:8080/v1 ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host) ERROR: http://192.168.196.196:8080/v1 is not accessible (Failed to connect to 192.168.196.196 port 8080: No route to host)

原因是没开8080端口，开通即可。

firewall-cmd --zone=public --add-port=8080/tcp --permanent firewall-cmd --reload

执行完成后，查看添加的主机信息。

镜像库

这里配置我已经搭建好的Docker私服：

参考

关于Docker目录挂载的总结

rancher安装，快速安装

Docker容器的重启策略及docker run的–restart选项详解

Rancher2.X中文官方文档

Rancher容器管理平台搭建