Docker

Docker Note

docker ps

​ list running containers

docker stop <container_id>

​ stops the container

docker start <container_id>

​ starts stopped container

docker ps -a

​ lists running and stopped container

docker run <image_name>:

​ pulls image and starts container

​ (docker pull + docker start in one command)

[CONTAINER Port vs HOST Port]

+ Multiple containers can run on your host machine

+ Your laptop has only certain ports available

+ Conflict when same port on host machine

綁定主機與container的port number docker run -p6000:6379 redis

docker run -p<host_port_number>:<container_port> redis

以 detached mode run docker docker run -p6000:6379 -d redis

跑先前pull&start過的 redis:4.0 docker run -p6000:6379 redis:4.0 -> port is already allocated

改用 host port 6001

docker run -p6001:6379 -d redis:4.0

docker pull

docker start

docker stop

docker run (pull + start) with options: -d to run in detached mode -p to bind port of your host to the container (-p<hostport>:<container_port>)

docker ps -a to give you all the containers no matter they are running currently or not

docker images to give you all the images that you have locally

docker ps -> (check locks, outputs) -> (for toubleshooting) docker logs <container_id>

docker logs <container_name>

docker logs <container_id_or_name>

How to assign name for container

docker run -d -p6001:6379 --name <custom_name> <container_image>

docker exec

​ to get the terminal of a running container

​ to check the configuration file

​ to navigate into a directory inside

​ to check the log file or the configuration file

​ to print out the environmental

docker exec -it <container_id> <directory_path> or

docker exec -it <container_name> <directory_path>

​ -it stands for interactive terminal ​ docker exec -it e851017211f1 /bin/bash ​ env 印出環境變數 ​ exit 離開container terminal

docker network ls 可以看到 auto generated network

(Network ID, name, driver, scope)

docker network create <name_of_docker_network>

安裝資料庫

• docker pull mongo

• docker pull mongo-express

• docker images 確認有沒有確實安裝以上兩個 images

• docker run -p27017:27017 -d mongo … 以下是可以開始 run 即加上去的環境變數

  • MONGO_INITDB_ROOT_USERNAME
  • MONGO_INITDB_ROOT_PASSWORD
  • MONGO_INITDB_DATABASE

• 加上初始化的環境變數，command就會變這樣

  • -e for environmental variables，可以 overwrite 預設值

  docker run -p27017:27017 -d -e MONGO_INITDB_ROOT_USERNAME=admin MONGO_INITDB_ROOT -e MONGO_INITDB_ROOT_PASSWORD=secret mongo
  

• 再加上兩個configurations

  1. container name – 用來跟 mongo express 連結
  2. docker network

  docker run -d \
  -p 27017:27017 \
  -e MONGO_INITDB_ROOT_USERNAME=admin \
  -e MONGO_INITDB_ROOT_PASSWORD=secret \
  --name mongodb \
  --net mongo-network \
  mongo
  

• 啟用 Mongo Express

  可以加入的環境變數主要有：

  1. ME_CONFIG_BASICAUTH_USERNAME
  2. ME_CONFIG_BASICAUTH_PASSWORD
  3. ME_CONFIG_MONGODB_ADMIN
  4. ME_CONFIG_MONGODB_ADMINUSERNAME
  5. ME_CONFIG_MONGODB_ADMINPASSWORD
  6. ME_CONFIG_MONGODB_PORT
  7. ME_CONFIG_MONGODB_SERVER
  8. ME_CONFIG_OPTIONS_EDITORTHEME
  9. ME_CONFIG_REQUEST_SIZE
  10. ME_CONFIG_SITE_BASEURL
  11. ME_CONFIG_SITE_COOKIESECRET
  12. ME_CONFIG_SITE_SESSIONSECRET
  13. ME_CONFIG_SITE_SSL_ENABLED
  14. ME_CONFIG_SITE_SSL_CRT_PATH
  15. ME_CONFIG_SITE_SSL_KEY_PATH