Redis容器添加配置文件

问题描述

使用官方Redis镜像，创建、启动Redis容器，找不到配置文件。

docker run -itd --name redis-test -p 6379:6379 redis

解决方案

之所以找不到配置文件，是因为官方Redis镜像本来就没有配置文件。对此有以下两种解决方案：

1. 创建容器时从宿主机映射配置文件至容器
2. 使用Dockerfile定制自己的Redis镜像

方案一：映射配置文件

1. 停止旧容器

   # 罗列当前
   docker container ls -a
   # 停止指定容器
   docker container stop container_name
   

2. 删除旧容器

   docker container rm container_name
   

3. 创建新容器

   docker run -itd --name redis-master -p 6379:6379 -v /F/Docker/mapping/redis/redis.conf:/etc/redis/redis.conf redis redis-server /etc/redis/redis.conf
   

   说明：

   • -v /F/Docker/mapping/redis/redis.conf:/etc/redis/redis.conf 从宿主机映射配置文件至容器
   • redis-server /etc/redis/redis.conf 以映射的配置文件启动Redis服务

方案二：定制镜像

1. 新建空文件夹，复制配置文件至文件夹

2. 编写dockerfile文件

   FROM redis
   COPY redis.conf /etc/redis/
   

   说明：COPY redis.conf /etc/redis/ 表示从工作上下文复制 redis.conf 文件至镜像的 /etc/redis/ 路径

   

3. 执行dockerfile，创建镜像

   docker build -t redis:xzy .
   

   执行结果：

   PS F:\Docker\mapping\定制> docker build -t redis:xzy .
   [+] Building 0.4s (7/7) FINISHED
    => [internal] load build definition from Dockerfile                                                                                                                                    0.0s
    => => transferring dockerfile: 76B                                                                                                                                                     0.0s
    => [internal] load .dockerignore                                                                                                                                                       0.0s
    => => transferring context: 2B                                                                                                                                                         0.0s
    => [internal] load metadata for docker.io/library/redis:latest                                                                                                                         0.0s
    => [internal] load build context                                                                                                                                                       0.1s
    => => transferring context: 93.78kB                                                                                                                                                    0.0s
    => [1/2] FROM docker.io/library/redis                                                                                                                                                  0.2s
    => [2/2] COPY redis.conf /etc/redis/                                                                                                                                                   0.0s
    => exporting to image                                                                                                                                                                  0.1s
    => => exporting layers                                                                                                                                                                 0.0s
    => => writing image sha256:ca2347f158f330e1e7be6047c09244398fa1387bcf63b6b072b47193560f18dd                                                                                            0.0s
    => => naming to docker.io/library/redis:xzy                                                                                                                                            0.0s
   
   Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
   PS F:\Docker\mapping\定制> docker images *
   REPOSITORY   TAG       IMAGE ID       CREATED          SIZE
   redis        xzy       ca2347f158f3   41 seconds ago   106MB
   redis        latest    aa4d65e670d6   4 weeks ago      105MB
   

4. 使用定制的Redis镜像创建容器

   docker run -itd --name redis-xzy -p 6379:6379  redis:xzy redis-server /etc/redis/redis.conf
   

   执行结果：

   PS F:\Docker\mapping\定制> docker images *
   REPOSITORY   TAG       IMAGE ID       CREATED         SIZE
   redis        xzy       ca2347f158f3   7 minutes ago   106MB
   redis        latest    aa4d65e670d6   4 weeks ago     105MB
   PS F:\Docker\mapping\定制> docker run -itd --name redis-xzy -p 6379:6379  redis:xzy redis-server /etc/redis/redis.conf
   1b69d36c032b95c7f2ca3c2e5e3170d25d9431c3049bd4fc4d85d36feb06e6ac
   PS F:\Docker\mapping\定制> docker container ls -a
   CONTAINER ID   IMAGE       COMMAND                  CREATED          STATUS                      PORTS                    NAMES
   1b69d36c032b   redis:xzy   "docker-entrypoint.s…"   14 seconds ago   Up 12 seconds               0.0.0.0:6379->6379/tcp   redis-xzy
   5bf4fbbb9828   redis       "docker-entrypoint.s…"   2 hours ago      Exited (0) 22 seconds ago                            redis-master
   fef59e1b8024   redis       "docker-entrypoint.s…"   2 weeks ago      Exited (0) 3 hours ago                               redis-test
   

   验证：

   PS F:\Docker\mapping\定制> docker exec -it redis-xzy /bin/bash
   root@1b69d36c032b:/data# cd /etc/redis/
   root@1b69d36c032b:/etc/redis# ls
   redis.conf
   root@1b69d36c032b:/etc/redis# ls -l
   total 92
   -rwxr-xr-x 1 root root 93724 Aug 16 05:27 redis.conf
   

参考文章

1. 解决创建Redis容器没有conf配置文件

2. Docker Dockerfile|菜鸟教程