Learn Docker and Devops. Docker Mastery: The Complete Toolset From a Docker Captain.
Docker Mastery: The Complete Toolset From a Docker Captain
https://www.udemy.com/docker-mastery
Course Resource
Skills
- Docker
- DevOps
- Docker Compose
- Docker Swarm
- Docker Machine
- GitHub
- DockerHub
install docker bash completion on Mac
> https://docs.docker.com/docker-for-mac/#installing-bash-completion
> brew install bash-completion
> ln -s /Applications/Docker.app/Contents/Resources/etc/docker.bash-completion /usr/local/etc/bash_completion.d/docker
ln -s /Applications/Docker.app/Contents/Resources/etc/docker-machine.bash-completion /usr/local/etc/bash_completion.d/docker-machine
ln -s /Applications/Docker.app/Contents/Resources/etc/docker-compose.bash-completion /usr/local/etc/bash_completion.d/docker-compose
install docker, docker-machine, docker-compose in Linux
> https://store.docker.com
> https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/
> curl -sSL https://get.docker.com/ | sh (install latest docker using script)
> docker version
> sudo usermod -aG docker <linux user> (add user in docker group)
> curl -L https://github.com/docker/machine/releases/download/v0.12.2/docker-machine-`uname -s`-`uname -m` >/tmp/docker-machine && chmod +x /tmp/docker-machine && sudo cp /tmp/docker-machine /usr/local/bin/docker-machine (install docker machine)
> docker-machine version
> sudo -i
> sudo curl -L
https://github.com/docker/compose/releases/download/1.16.1/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose (install docker compose)
> chmod +x /usr/local/bin/docker-compose
> exit
> docker-compose version
start a nginx web server container
> docker container run --publish 80:80 nginx (--publish for port, -p)
> docker container run --publish 80:80 --detach nginx (--detach for run in background, -d)
> curl 127.0.0.1
> docker container ls
> docker container stop <container id>
> docker container ls -a
> docker container run --publish 80:80 --detach --name webhost nginx (--name for define container name)
> docker container logs webhost (watch log in webhost container)
> docker container top webhost (watch process in webhost container)
> docker container --help
> docker container rm <container id> (docker container rm 4d5 834 9bc)
> docker container rm -f <container id> (force delete docker container
Container VS. VM: It's Just a Process
> docker container run --name mongo -d mongo
> docker container top mongo
> ps aux (show all running process)
> ps aux | grep mongo
> docker container stop mongo
> ps aux | grep mongo
> docker container start mongo
> ps aux | grep mongo
Some docker container supply resource
> https://github.com/mikegcoleman/docker101/blob/master/Docker_eBook_Jan_2017.pdf
> https://www.youtube.com/watch?v=sK5i-N34im8 (Cgroups, namespaces, and beyond: what are containers made from?)
> https://www.youtube.com/watch?v=066-9yw8-7c (Windows Containers and Docker 101)
> https://www.youtube.com/watch?v=4ZY_4OeyJsw (Windows and Linux Parity with Docker)
> https://www.youtube.com/watch?v=QASAqcuuzgI (Docker + Microsoft - Investing in the Future of your Applications)
Manage Multiple Containers
> docker container run --name nginx -p 80:80 -d nginx
> docker container run --name httpd -p 8080:80 -d httpd
> docker container run --name mysql -e MYSQL_RANDOM_ROOT_PASSWORD=yes -p 3306:3306 -d mysql
> docker container logs mysql (find the root pwd in mysql log)
> docker container stop nginx httpd mysql
> docker container rm nginx httpd mysql
> docker container <stop, or rm> <container id, or name >
> docker container ls
Containers CLI Process Monitoring
> docker container run --name nginx -p 80:80 -d nginx
> docker container run --name mysql -e MYSQL_RANDOM_ROOT_PASSWORD=yes -p 3306:3306 -d mysql
> docker container top mysql
> docker container inspect mysql
> docker container stats (realtime monitor container stat)
Run Shell Inside Containers
> docker container run -it <image> (start a interactive container)
> docker container exec <container> <command> (run command in container)
> docker container run -it --name proxy nginx bash
> ls -al (in container now)
> docker container ls -a
> docker container start -ai proxy
> ls -al (in container now)
> docker container exec <container> <command> (ex. ip a)
> docker container exec mysql ip a
> docker container exec -it <container> <command> (ex. bash)
> docker container exec -it mysql bash
> ps aux (in container now)
> docker pull alpine
> docker container run -it alpine sh
Linux Package Management Basics: apt, yum, dnf, pkg
> https://www.digitalocean.com/community/tutorials/package-management-basics-apt-yum-dnf-pkg
Docker Networks and Container and command
> docker container port <container> (watch container using port)
> docker container run -p 80:80 --name webhost -d nginx
> docker container port webhost
> docker container inspect --format '{{ .NetworkSettings.IPAddress }}' webhos (foramt to Go template)
> docker network ls
> docker network inspect bridge
> docker network create --driver=bridge my_app_net
> docker network inspect my_app_net
> docker network create --help
> docker container run -d --name new_nginx --network my_app_net nginx
> docker network inspect my_app_net
> docker network connect my_app_net webhost (add webhost in my_app_net network)
> docker container inspect webhost
> docker network disconnect my_app_net webhost (remove webhost in my_app_net network)
> docker container inspect webhost
Docker Networks: DNS and How Containers Find Each Other
> docker container ls
> docker container run -d -p 80:80 --name nginx1 --network my_app_net nginx:alpine
> docker container run -d --name nginx2 --network my_app_net nginx:alpine
> docker container run -d --name nginx3 --network my_app_net nginx:alpine
> docker container exec -it nginx1 ping nginx2 (reach)
> docker container exec -it nginx2 ping nginx3 (reach)
> docker container run -d --name nginx4 nginx:alpine
> docker container run -d --name nginx5 nginx:alpine
> docker container exec -it nginx4 ping nginx5 (no reach, because default bridge network no build-in DNS)
Using Containers to test different Linux CLI
> docker container run --rm -it centos:7 bash (--rm, mean delete container when exit)
> curl version (in container now)
> docker container run --rm -it ubuntu:14.04 bash (--rm, mean delete container when exit)
> curl version (in container now)
DNS Round Robin Test, use --network-alias
> docker network create dude
> docker container run -d --network dude --network-alias web httpd
> docker container run -d --network dude --network-alias web nginx
> docker container ls (see 2 web server run on 80 port)
> docker container run --rm --network dude alpine nslookup web (Address 1: 172.19.0.2 web.dude, Address 2: 172.19.0.3 web.dude)
> docker container run --rm --network dude alpine ping web (run many times, and response 172.19.0.2 or 172.19.0.3 randomly)
Using Docker Hub Registry Images
> docker pull nginx (image name)
> docker pull nginx:1.11.9 (image name and version)
> docker image ls
Images and Their Layers
> docker image history nginx (nginx image build layers)
> docker image history mysql (mysql image build layers)
> docker image inspect nginx
Image Tagging and Pushing to Docker Hub
> docker image tag <source image:tag> <target image:tag>
> docker image tag alpine smalltides/alpine
> cat ~/.docker/config.json
> docker login
> docker image push smalltides/alpine (push to dockerhub)
> docker image tag smalltides/alpine smalltides/alpine:testing
> docker image ls
> docker image push smalltides/alpine:testing
Building Images: The Dockerfile
> docker build -t <new image name> .
> docker build -t <new image name> -f <Dockerfile Name>
> FROM, ENV, RUN, EXPOSE, COPY, CMD (some Dockfile command)
Building Images: Extending Official Nginx Images
> docker container run -p 80:80 --rm nginx
> curl 127.0.0.1
> cd dockerfile-sample-2
> docker build -t nginx-with-html .
> docker container run -p 80:80 --rm nginx-with-html
> curl 127.0.0.1 (watch the response html)
> docker image tag nginx-with-html smalltides/nginx-with-html:latest
> docker image push smalltides/nginx-with-html:latest
Build Your Own Dockerfile and Run Containers From It
> cd dockerfile-assignment-1
> docker build -t testnode .
> docker container run --rm -p 80:3000 testnode
> curl 127.0.0.1 (see Node.js Express App on page)
> docker image tag testnode smalltides/testnode
> docker image push smalltides/testnode
> docker image rm smalltides/testnode
> docker container run --rm -p 80:3000 smalltides/testnode (download from docker hub)
> curl 127.0.0.1 (see Node.js Express App on page)
> https://github.com/BretFisher/node-docker-good-defaults (docker node dev template)
Container Lifetime & Persistent Data
> https://12factor.net/zh_cn/
> https://medium.com/@kelseyhightower/12-fractured-apps-1080c73d481c
Persistent Data: Data Volumes
> docker pull mysql
> docker image inspect mysql
> docker container run -d --name mysql -e MYSQL_ALLOW_EMPTY_PASSWORD=True mysql
> docker container inspect mysql (see volume)
> docker volume list
> docker volume inspect <volume_id>
> docker container run -d --name mysql2 -e MYSQL_ALLOW_EMPTY_PASSWORD=True -v mysql-db:/var/lib/mysql mysql (named volume)
> docker volume list (see a volume named mysql-db)
> docker container inspect mysql2
> docker volume inspect mysql-db
> docker container run -d --name mysql3 -e MYSQL_ALLOW_EMPTY_PASSWORD=True -v mysql-db:/var/lib/mysql mysql (container mysql3 use mysql-db volume)
> docker volume create --help
Persistent Data: Bind host Mounting in container
> cd dockerfile-sample-2
> docker container run -d --name nginx -p 80:80 -v $(pwd):/usr/share/nginx/html nginx (mount host file in container)
> docker container inspect nginx
Database Upgrades with Named Volumes
> docker container run -d --name postgres -v psql-data:/var/lib/postgresql/data postgres:9.6.1 (named volume)
> docker volume list (see psql-data volume)
> docker volume inspect psql-data
> docker container inspect postgres
> docker container logs postgres
> docker container stop postgres
> docker container rm postgres
> docker container run -d --name postgres -v psql-data:/var/lib/postgresql/data postgres:9.6.2
> docker volume list (see psql-data volume)
> docker container logs postgres
Edit Code Running In Containers With Bind Mounts
> https://jekyllrb.com
> cd bindmount-sample-1
> docker container run -p 80:4000 -v $(pwd):/site bretfisher/jekyll-serve ( $(pwd) for get current folder to binding into container)
> curl 127.0.0.1 (if edit the code of bindmount-sample-1, will see the instant change)