docker

Docker

Resources

• tbd

Mac localhost

http://docker.for.mac.localhost

Stop All

docker stop $(docker ps -aq)

Shell in a container

docker exec -it container_name /bin/bash

(or /bin/ash if alpine)

Execute command in container

docker exec -it my_container sh -c "echo a && echo b"

Logs

docker logs -f aa1fb0d033b9

http://phase2.github.io/devtools/common-tasks/ssh-into-a-container/

• Use the command docker exec -it /bin/bash to get a bash shell in the container

How do I SSH into a running container http://phase2.github.io/devtools/common-tasks/ssh-into-a-container/

TODO

Docker

docker run -it --entrypoint /bin/bash

run wget -> replace with ADD URI filename

alpine apk https://wiki.alpinelinux.org/wiki/Alpine_Linux_package_management#Add_a_Package

Try ECS for k8s?

docker run -d -p 8080:8080 -e WHO="Sean and Karl"
example/docker-node-hello:latest

docker exec -it /bin/bash docker run -it

mount file system -v /mnt/session_data:/data --read-only=true 

-i interactive -t pseudo-tty

--rm delete container on exit

--tmpfs tmp filesystem

--read-only=true --tmpfs /tmp:rw,noexec,nodev,nosuid,size=256M

docker ps -a

pause/unpause

docker stop docker kill

docker rmi - remove image

docker system prune

delete all containers docker rm $(docker ps -a -q)

delete all images docker rmi $(docker images -q -)

docker system prune -a

-d daemon mode

docker inspect

docker exec

docker top

https://derickbailey.com/2017/03/09/selecting-a-node-js-image-for-docker/

• principle - base all on alpine if possible

define ENTRYPOINT and CMD rather than just CMD

https://ropenscilabs.github.io/r-docker-tutorial/04-Dockerhub.html docker tag 029df420bc7b s22s/geo-swak:v2 docker push s22s/geo-swak

docker rmi -f $(docker images | grep "" | awk "{print $3}") && docker ps -a -q | xargs docker rm -f docker system prune`

docker system prune --filter "until=200h"

journalctl -u docker.service

docker system prune -a -f

docker run

docker rm

docker log {container-name}

https://www.ctl.io/developers/blog/post/docker-networking-rules/ http://txt.fliglio.com/2013/11/creating-a-mysql-docker-container/

docker run --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d -p 3306:3306 mysql:5.7

mysql -uroot -h127.0.0.1 -P3306

docker run --rm -d locushealth/mysql:repopped

docker rm -f docker ps -q

You'll also need to modify config/database.yml to point to the host 127.0.0.1 instead of localhost, because localhost tries to connect over a socket instead of HTTP.

[10:53] If I were starting from scratch, I'd grab the mysql container from Docker Hub for the version we want, spin it up, run the provisioning stuff against it like any other new DB, then save it as an image and use that going forward.

https://severalnines.com/blog/mysql-docker-containers-understanding-basics

keep small -- use alpine, busybox, or debian base images single process/svc per container cleanup after each command use multi-stage build