DockerCommandCheckList.txt

Important docker commands

docker --version
#This will print the both client and server(daemon)
docker version
#This will list all the docker images in the local docker repository
docker images
docker image ls
#This will list all the containers which are running
docker container ls
#this will start a container with image test:latest and port forward 8080:8080
docker container run -d --name web1 -p 8080:8080 test:latest
#This will stop the container with container id <containerID>
docker stop <containerID>
#This command will build a image from the docker file -t stands for tag
docker image build -t <imageName>:<tagName> .
#To inspect an image
docker image inspect <imageName>:<tagName>
#To remove image from the image repository
docker image rm <imageName>:<tagName>
docker image rm <imageID>
#To remove all images from the image repository.
docker image rm $(docker image ls -q) -f
#To list all the containers which are running/stopped
docker ps -a
#To remove the containers
docker container rm  <containerName>
docker container rm  <containerID>
#To list all the containerid and remove them. This means hard stop and
#remove them
docker container rm $(docker ps -a -q)
#To attach to the running container
docker container exec -it <containerID or containerName> <command>
docker container exec -it <containerID or containerName> /bin/bash
#In order to remove images from the local image repository
docker image prune
#In order to run a container in detach mode use -d option
docker container run -d --name <containerName> -p <exposedPort:port> imageName
ex: docker container run -d --name myserver -p 80:8080 repositoryName/imageName:tagName
#In order to remove the containers forcefully
docker container rm $(docker container ps -aq) -f
#Ability to make the single node or VM as docker swarm manager
#in case of load balancer the ipaddress1 can be loadbalaner ip ipaddress
#it makes sense to have both this ipaddress specified
docker swarm init --advertise-addr <ipaddress1:2377> --listen-addr <ipAdress2:2377>
#To create a token for the workers to join this manager run the command on leader node
docker swarm join-token --token <tokenString> worker <ipaddress1:2377>
#To create a token for other managers to join this manager run the command on the leader node
docker swarm join-token --token <tokenString> manager <ipAddress1:2377>
#To create a service to be used in the docker swarm deployment
docker service create --name <serviceName> -p <port:port> --replicas <repliceCount> <imageName>
#To list all the services
docker service ls
#To list all the task (containers) running in a service and their task
docker service ps <serviceName>
#To get the detailed information about the service
docker service inspect --pretty <serviceName or serviceID>
#To increase the scale of the sevice
docker service scale <serviceID or serviceName>=<repliceCount>
#To remove a service
docker service rm  <serviceName or serviceID>
#To create an overlay network
docker network create -d overlay <networkName>
#To clean data from the docker host
docker system prune -f
#To remove the docke image
docker rmi <repositoryName:tag> or <imageID>
#To run the docker image if it is present in the docker registry or pull the image into the local docker registry and run it.
docker run <repositoryName:tag> // if tag is not given defaults to latest
#One can stop the containers and then we start then they pick the state where they were in. Unless one does remove container
#To run the docker in the detached mode
docker run -d --name <nameOfContainer> -p 80:8080 <repositoryName:tagName> // start the specified image , map the inside port 8080 to the outside 80
docker run -it --name <nameOfContainer> <repositoryName:tagName> COMMAND // docker run -it --name temp ubuntu:latest /bin/bash
# the command ctrl + p + q for exiting the container without terminating it process
docker stop $(docker ps -aq) // -a all container -q quiet meaning returns only the container ids
docker run
docker pull
docker images
docker rmi // removes images from the docker host
docker ps
docker stop
docker rm // removes the stopped container and if used with '-f' option force; it means stopping and deleting the container
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Docker Swarm mode
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Terminology
Swarm mode -- docker engine running per host or machine in swarm mode
Manager node - a particular node running in manager mode ( 3 or 5 manager nodes is recommended )
Leader - one leader out of all the manager nodes
Worker node - execute task
Services - Declarative and scalable
Task - Assigned to work atomict unit ex : each task is one container
docker service create --name web-fe --replica 5 // create a service with name web-fe and has 5 task/containers/instances of it
docker swarm init --advertise-addr  <ipAddress>:2377 --listen-addr <ipAddress>:2377 // in case of multiple nic/ips it is always better to specify the ipaddress
// listen-addr one on which swarm listens on the swarm related traffic 2377 is going to official docker swarm port forward
docker swarm join --token <workertokenString> <ipAddress>:2377 // ipAddress of the swarm manager
docker swarm join-token-manager // this results a command which can be used when another node wants to join a swarm manager
docker swarm join --token  <managertokenstring> <ipAddress>:2377 // ipAddress of the swarm manager
docker swarm join-token-manager // prints the command to be executed when a node wants to join as a manager
docker swarm join-token-worker // prints the command to be executed when node wants to join as a worker
docker swarm join --token <workertokenString> <ipAddressofMachineWhereSwarmInit>:2377 --advertise-addr  <ipAddress>:2377 --listen-addr <ipAddress>:2377
docker node ls // print all the nodes in the Swarm.Can be run from only manager nodes
docker node promote <idfromthebovedockernodelscommand>|<ipAddres> //this promotes the ipAddress machine to be a manager
docker node ps //list all the containers running on the node
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Docker Swarm mode Services
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docker service create --name <serviceName> -p <insidePort:outsidePort> --replicas <replicaCount> <imageName>
docker service ps <serviceName> //list all the service instances / tasks across the swarm
//native container aware load balancer routing mesh
docker service scale <serviceName>=<replicaCount>
docker service update --replicas <replicaCount> <serviceName>
//One can have multiple container instances per docker node
docker network create -d overlay <networkName> // create a overlay network with networkName
docker network ls
docker service create --name <serviceName> -p <insidePort:outsidePort> --replicas <replicaCount> --network <networkName> <imageName>
docker service inspect --pretty <serviceName>
docker service create --name <serviceName> --update-parallelism <parallelismCount> --update-delay <delayCount>
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Docker Stack and DAB (Distributed Application Bundles)
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Stack is logical unit of all docker services so they can be deployed as one units
docker-compose build // to build the images and pushed into the repository
docker-compose bundle // creates the dab file . it requires the compose file to cleaned of volume and should be referring to images
docker stack deploy <dabfilename> // create a stack with name <dabFileName> and services defined inside the dab file are deployed
docker stack tasks <stackName> // shows the task inside each service
docker stack rm <stackName>