Spring -- Docker

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容器 / 虚拟机

容器是应用层的抽象，是标准化的单元，容器内部不包含操作系统的细节和内容，比虚拟机轻量

Docker

开发：简化开发环境的搭建；运维：交付系统更为流畅，伸缩性更好

常用命令

镜像相关

  1. docker search <image>
  2. docker pull <image>

容器相关

  1. docker run
  2. docker start/stop <container>
  3. docker ps <container>
  4. docker logs <container>

docker run

  1. docker run [option…] image [command] [arg…]
  2. -d：后台运行容器
  3. -e：设置环境变量
  4. --expose/-p 宿主端口:容器端口
  5. --name：指定容器名称
  6. --link：链接其他容器
  7. -v 宿主目录:容器目录，挂载磁盘卷

mongo

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$ docker search mongo
NAME                                DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
mongo                               MongoDB document databases provide high avai…   6196                [OK]
mongo-express                       Web-based MongoDB admin interface, written w…   516                 [OK]
tutum/mongodb                       MongoDB Docker image – listens in port 27017…   228                                     [OK]
...

docker pull

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$ docker pull mongo
Using default tag: latest
latest: Pulling from library/mongo
Digest: sha256:d9e20d05063ba34bac4da916e335c70d6add38241cee1e99ad96c47660bd6955
Status: Image is up to date for mongo:latest
docker.io/library/mongo:latest

docker images

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docker images
REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
mongo                       latest              cdc6740b66a7        4 weeks ago         361MB
zookeeper                   latest              4ebfb9474e72        5 months ago        150MB
mysql                       latest              7bb2586065cd        5 months ago        477MB
...

docker run

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$ docker run -d --name mongo -p 27017:27017 -v ~/docker-data/mongo:/data/db -e MONGO_INITDB_ROOT_USERNAME=root -e MONGO_INITDB_ROOT_PASSWORD=123456 mongo
19fcb168261d63aa094ed79b7d93d997f1b58330537fc76bd1bebf24f8cbee1f

docker ps

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$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                      NAMES
19fcb168261d        mongo               "docker-entrypoint.s…"   6 minutes ago       Up 6 minutes        0.0.0.0:27017->27017/tcp   mongo

docker exec

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$ docker exec -it mongo /bin/bash
root@19fcb168261d:/# mongo -uroot -p123456
MongoDB shell version v4.2.0
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("9413b54e-cf03-4951-9dbb-8e069565a503") }
MongoDB server version: 4.2.0
Welcome to the MongoDB shell.

> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB
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