Summary of Docker commands

1. Docker's basic command [root@node02 ~] # docker volume prune-f # deletes unowned data volumes # when you run the container, the-v mounts directories without specifying local directories to be mounted, but is managed by docker. # when the container is deleted, these directories will not be deleted. In this case, such directories are unowned data volumes. # to delete these volumes at the same time when deleting containers, you can use the following command (add the "- v" option): [root@node02 ~] # docker rm-f-v 8086 # where 8086 is the container ID [root@master volumes] # docker container prune-f # clean up all containers in the terminated state. [root@localhost ~] # docker search dhcp # search for an image [root@localhost ~] # docker pull docker.io/networkboot/dhcpd # download a queried image [root@localhost ~] # docker images # query the downloaded image [root@localhost ~] # docker tag docker.io/networkboot/dhcpd dchp:dhcp # change its name and label [root@localhost ~] # docker rmi docker.io / networkboot/dhcpd # Delete image [root@localhost ~] # docker save-o dhcptest dchp:dhcp # Export as local image [root@localhost ~] # docker load-- input dhcp # Import image # or [root@localhost ~] # docker load

Dhcp busybox:latest # Export image busybox [root @ localhost ~] # docker push docker.io/ljztest/dhcp # upload image [root@localhost ~] # docker create-itd dchp:dhcp / bin/bash # create a container And specify the pseudo terminal # option to be explained as follows: *-I: interactive *-t: assign one for the terminal *-d: run [root@docker] # docker run-itd-- name test2-- restart=always httpd # keep the container in the boot self-boot state # the function is to restart the container when "systemctl restart docker" is executed # if you do not add-- restart, then once "systemctl restart docker" is executed, the container will stop. [root@localhost ~] # docker ps-a # check the ID number of the container [root@localhost ~] # docker exec-it 2304f92a8158 / bin/bash # enter a container [root@docker ~] # docker attach test1 # also enter a container # if you enter the container and use exit to exit, the container will also be closed. # using ctrl+p ctrl+q to exit the container will not close the container, but will keep the container running. [root@docker ~] # docker ps-a-Q | xargs docker start # Open all containers [root@docker ~] # docker ps-a-Q | xargs docker stop # close all containers [root@docker ~] # docker logs test1 # to view container logs, you can add the "- f" option to dynamically output [root@docker ~] # docker ps-a-Q | xargs docker rm-f # delete all containers No less powerful than rm-rf / * [root@localhost ~] # docker ps-a-Q | xargs docker start # starts all containers [root@localhost ~] # docker rm 2304f92a8158 # Delete containers [root@docker ~] # docker run-it-- name containerB-c 512 centos# to create a container called containerB Set the weight of its CPU to 512 [root@docker ~] # docker run-it-- name testA-- device-write-bps / dev/sda:30MB centos# limit the size of the disk that can be written per second to 30MB#, and there are the following options: #-- device-read-bps: set the bps#--device-write-bps of the read device: set the bps#--device-read-iops of the write device: set the iops#-- of the read device Device-write-iops: sets the iops of the writing device. [root@docker lv] # docker history test04:latest # if you use Dockerfile to create an image, you can use this command to see what the image has done [root@docker ~] # docker logs web01 # to view the container log. You can add the "- f" option to refresh dynamically. [root@docker ~] # docker commit web01 mytest:v1.0 # make the container as an image [root@docker ~] # docker cp / a.txt web01:/usr # copy the local files into the container [root@docker ~] # docker cp web01:/usr/a.txt / usr # copy the files in the container to the local machine. Commands related to docker network management: [root@docker ~] # docker network ls # View docker's network [root@docker ~] # brctl show # dedicated to view virtual network [root@docker ~] # docker exec web ip a # View the network information of a specified container [root@docker ~] # docker network create-d bridge my_net # create a docker network -d: specify the driver type [root@docker ~] # docker network create-d bridge-- subnet 172.22.0.0Accord24 my_net2 # when creating a network Specify the network segment [root@docker ~] # docker network inspect my_net2 # View the details of this network [root@docker ~] # docker inspect web05 # View the details of the container [root@docker ~] # docker inspect web05 # View the details of the container [root@docker ~] # docker run-tid-- name web07-- network my_net2-- ip 172.22.0.8 busybox # specify the IP address when starting the container. [root@docker ~] # docker exec web03 ping 172.17.0.3 # does not enter the virtual machine to execute ping commands. [root@docker ~] # iptables-save # View the iptables rule [root@docker ~] # docker network connect my_net web001 # Connect web001 to the my_net network. After execution, the web001 will have an extra network card and have the IP address of the my_net network. 3. Docker Swarm Cluster Common commands [root@docker01 ~] # docker node ls # View cluster information (can only be viewed on hosts in the manager role) [root@docker01 ~] # docker swarm join-token worker # if you need to join the worker side later, you can execute this command to view the token (that is, the command to be executed when joining) [root@docker01 ~] # docker swarm join-token manager # ditto, to join the manager side You can execute this command to view the token. Dynamic expansion and reduction of [root@docker01 ~] # docker service scale web05=6 # Container [root@docker01 ~] # docker service ps web01 # View the nodes on which the created container runs [root@docker01 ~] # docker service ls # View the created service # detach the docker03 from the cluster [root@docker03 ~] # docker swarm leave # docker03 from the cluster [root@docker01 ~] # docker node rm docker03 # then remove docker03 [root@docker01 ~] # docker node promote docker02 # on the server of the manager role and upgrade docker02 from worker to manager. # after upgrade, docker02 status will be Reachable [root@docker01 ~] # docker node update-- availability drain docker01# sets host docker01 not to run containers, but containers that are already running will not stop

-this is the end of this article. Thank you for reading-