Spring Microservices

commands

Important Docker Compose commands

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docker-compose images

“docker-compose images” command builds images of the mentioned services present in the docker-compose.yml file for which a Dockerfile is provided. The job of the “build” command is to get the images ready to create containers. If a service is using the prebuilt image, it will skip that service.

docker-compose build

“docker-compose build” command will list the images built using the current docker-compose file.

docker-compose run

“docker-compose run” command is somewhat similar to docker run command. It creates containers from images built for the services mentioned in the compose file. It runs a specific service provided as an argument to the command.

docker-compose up

“docker-compose up” command does the job of “docker-compose build” and “docker-compose run” commands. It initially builds the images if they are not located locally and then starts the containers. If images are already built, it will fork the container directly. We can force it to rebuild the image by adding a –build argument.

docker-compose stop

“docker-compose stop” command will stop the running containers of the specified services in the docker-compose file.

docker-compose rm

“docker-compose rm” command removes the containers of the services or the containers created using the current docker-compose file. It can be containers created using the “docker-compose run” command or the “docker-compose up” command. It will remove all the containers which have services mentioned in the docker-compose file.

docker-compose start

“docker-compose start” command starts any stopped containers of the services. If all the containers are already up and running, they will just inform that all containers are starting and exit with 0 status.

docker-compose restart

“docker-compose restart” command restarts all the containers of the services.

docker-compose ps

“docker-compose ps” command lists all the containers for services mentioned in the current docker-compose file. The containers can either be running or stopped.

docker-compose down

“docker-compose down” command is similar to “docker system prune”. However, there is a small difference. It stops all the services and then cleans up the containers, networks, and images used and created by the compose file services.

docker-compose logs

“docker-compose logs” command is similar to docker logs <container ID>. The little difference is this prints all the logs created by all the services. We can also use the -f argument to see real-time logs.

Important Docker commands

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docker -version

This command is used to get the docker version currently installed.

docker login

This command is used to login into the docker hub repository. It will ask you for the username and password as you enter the command.

docker pull

This command is used to pull docker images from the docker repository (hub.docker.com). A pull command forces an image to download, whether it is already present in local or not.
Usage :- docker pull <imageName>
Example :- docker pull mysql

docker push

This command pushes an image to the docker hub repository.
Usage :- docker push <username/imageName>
Example :- docker push myaccountName/my-spring-boot-app

docker run

This command is used to create a container from an image.
Usage :- docker run -it -d <imageName>
Example :- docker run -it -d ubuntu

docker commit

When you make any changes inside any file in the container, then we can commit the changes. When you commit the container, a new image is created and you can push that image to the registry. Anybody can fetch the image and will have the same code with a consistent environment. This also helps in deployment as well.
Usage :– docker commit -m “<commit message>” <container_id/name> <new_image_name>:<version>.

docker ps

This command lists the containers that have stopped.

docker ps -a

This command shows all the running, exited and stopped containers.

docker images

This command shows all the docker images stored locally.

docker stop

This command is used to stop the running container.
Usage :- docker stop <containerId>

docker kill

This command stops the execution of the container immediately. The difference between docker stop and docker kill command is that, the later stops the container abruptly, whereas the former stops the container gracefully.
Usage :- docker kill <containerId>

docker rm

remove/delete the docker container with the container id mentioned.
Usage :- docker rm <containerId>

docker rmi

remove/delete the docker image from local storage, with the docker image id mentioned.
Usage :- docker rmi <containerId>

docker container prune -f

This is the equivalent of running one docker rm command for each stopped container. The -f switch is an implicit confirmation to proceed and delete all stopped containers right away, instead of asking to confirm that operation.

docker image prune -f

his is the equivalent of running one docker rmi command for each image. The -f switch is an implicit confirmation to proceed and delete all images right away, instead of asking to confirm that operation.

docker exec

This command is used to run commands inside the docker container
Usage :- docker exec -t <containerId> bash

docker restart

This command is used to restart the docker container.
Usage :- docker restart <containerId>

docker start

This command is used to start the docker container.
Usage :- docker start <containerId>

docker info

Using this command we can get the metadata information like kernel version, number of containers , no of running containers etc.

docker history

Shows the history of the docker image
Usage :- docker history <imageName>

docker logs

This command will show the container logs of the container id provided. It retrieves the logs of a container, even when it has stopped. The “docker logs” command outputs exactly the same text you saw when you ran the container. This is the standard output of the container.
Usage :- docker logs <containerId>

docker inspect

This command gets the detailed information about a running or stopped container. The “docker inspect” command gets you an abundance of information about many aspects of the container – whether it is still running or stopped.
Usage :- docker inspect <containerId>

docker volume

This command will create a volume which will be used by the docker container to store data .

docker stats

High availability Docker servers are monitored with tools that are up to the tasks such as collecting your logs and providing usage statistics. It will list the live running containers and information on how many resources they are consuming on the host machine. Like a docker ps extended with live resource usage data.

docker volume create

This command is used to create a new volume.
Usage: docker volume create <volume_name>

docker inspect volume

This command is used to inspect the created volume.

docker run -v

This command is used to mount a volume.

List of all Git Commands

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Basic Git commands

git config –global user.name “[firstname lastname]”

This command sets the firstname and lastname. Whatever you set will be visible in the commit history.

git config –global user.email “[valid-email]”

This command sets the emailid, and this will be visible in the commit history.

git init

This is used initialize an empty GIT repository.

git clone [repourl]

This will clone the entire repository from the repository url specified.

Git commands post changes

git status

To view the changes or the untracked files in the project that has not been saved yet.

git add [file]

Whenever you add a new file to GIT, you have to stage it first. Below example either adds a single file or all files.
Example: git add fileName OR git add .

git commit -m “[commit message to identify later]”

Once your files are staged, this command will commit the files.

git log

this command is used to view the history of the project which shows the Commit Id, Author, Date and commit message.

git branch

List all the branches.

git branch [new branch name]

This command will create a new branch.

git checkout

This command will switch to another branch and checkout into your working directory.

git push [alias] [branch]

Push the changes done on local repository to remote repository.

git pull

This command fetches and merges changes from the remote server to your working directory.

Project Sharing

git remote add [alias] [url]

To connect your remote repository to to Local repository.
Example:- git remote add origin your_git_url

git remote -v

To view all the remote urls out there.