docker

Notes and examples

Start Docker Service

sudo dockerd

Image and Containers

docker container run --publish 80:80 --detach nginx
docker container run --publish 80:80 --detach --name webhost nginx

Check What's going on?

docker container top webhost //List running processes in a container
docker container stats webhost
docker container inspect webhost
docker container logs webhost

Remove

docker container rm <id>

Shell inside running container

// while starting

docker container run -it --name proxy nginx bash // i -> interactive. t -> tty
docker container start -ai name_of_stopped_container
docker container exec -it name_of_running_container bash

Some Containers

docker container run --publish 80:80 --detach --name webserver nginx
docker container run --publish 8080:80 --detach --name webhost httpd
docker container run --publish 3306:3306 --detach --name dbserver --env MYSQL_RANDOM_ROOT_PASSWORD=yes mysql

Networking

docker container port name_of_running_container 

docker network ls
docker network inspect network_name
docker network create my_new_network
docker container run -d --name new_nginx --network my_app_net nginx
nginx:alpine

Volumes

docker volume ls

Specify volumes

1. In docker file VOLUME /var/lib/mysql

2. Using -v docker container run -d --new mysql -e MYSQL_ALLOW_EMPTY_PASSWORD=true -v /var/lib/mysql mysql

3. Named volume docker container run -d --new mysql -e MYSQL_ALLOW_EMPTY_PASSWORD=true -v mysql-db:/var/lib/mysql mysql

Check Volumes

docker container inspect <name> Look for volumes, Mounts in the json

Bind Mounting