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This article mainly explains "how to modify the port mapping of the docker container". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to modify the port mapping of the docker container.

problem

View the docker container port mapping of the running mysql:

$docker container port mysql 3306/tcp-> 0.0.0.0 docker-entrypoint.s 3306$ docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES5f29020b36c0 mysql "docker-entrypoint.s …" 16 hours ago Up 33 seconds 0.0.0.0 3306/tcp 3306-> 33060/tcp mysql

From the query results of the above two commands, we can see that port 3306 of mysql is mapped to port 3306 of the local physical machine. The problem now is to map port 33060 of the mysql container to port 33060 of the native physical machine, that is, to modify the existing container-to-port mapping configuration.

Step to determine the container iddocker container inspect mysql

The effect is as follows:

The mysql container ID here is: 5f29020b36c0971da5d50825f4132d0eaf40f1e5efaac02eadab23239ca77d7d

Stop container $docker stop mysqlmysql and log in to linuxcd ~ / Library/Containers/com.docker.docker/Data/vms/0/ inside docker

Under this directory, there is a tty file, through which we can log in to the linux interface inside docker, and then log in using the following command:

Screen tty

If you encounter a blank command line, enter directly.

Edit config.v2.jsoncat / var/lib/docker/containers/5f29020b36c0971da5d50825f4132d0eaf40f1e5efaac02eadab23239ca77d7d/config.v2.json

The specific effect is shown in the following figure:

Copy this content, paste it into your local text editor, and format it for editing:

Edit hostconfig.jsoncat / var/lib/docker/containers/5f29020b36c0971da5d50825f4132d0eaf40f1e5efaac02eadab23239ca77d7d/hostconfig.json

The specific effect is shown in the following figure:

Copy this content, paste it into your local text editor, and format it for editing:

Add a new 33060 port mapping as follows:

After the modification, compress the modified json into one line, and modify the hostconfig.json file through vi:

Vi / var/lib/docker/containers/5f29020b36c0971da5d50825f4132d0eaf40f1e5efaac02eadab23239ca77d7d/hostconfig.json

The contents are as follows:

{"Binds": ["/ Users/zhangyalin/Documents/databases/mysql/data:/var/lib/mysql"], "ContainerIDFile": "", "LogConfig": {"Type": "json-file", "Config": {}}, "NetworkMode": "default", "PortBindings": {"3306/tcp": [{"HostIp": "," HostPort ":" 3306 "}]," 33060/tcp ": [{" HostIp ":"," HostPort ":" 33060 "}]} "RestartPolicy": {"Name": "no", "MaximumRetryCount": 0}, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": null, "CapAdd": null, "CapDrop": null, "Dns": [], "DnsOptions": [], "DnsSearch": [], "ExtraHosts": null, "GroupAdd": null, "IpcMode": "shareable", "Cgroup": ", Links": null, "OomScoreAdj": 0, "PidMode": "," Privileged ": false," PublishAllPorts ": false "ReadonlyRootfs": false, "SecurityOpt": null, "UTSMode": "," UsernsMode ":", "ShmSize": 67108864, "Runtime": "runc", "ConsoleSize": [0d0], "Isolation": "," CpuShares ": 0," Memory ": 0," NanoCpus ": 0," CgroupParent ":"," BlkioWeight ": 0," BlkioWeightDevice ": []," BlkioDeviceReadBps ": null," BlkioDeviceWriteBps ": null," BlkioDeviceReadIOps ": null," BlkioDeviceWriteIOps ": null," CpuPeriod ": 0," CpuQuota ": 0 "CpuRealtimePeriod": 0, "CpuRealtimeRuntime": 0, "CpusetCpus": "," CpusetMems ":", "Devices": [], "DeviceCgroupRules": null, "DiskQuota": 0, "KernelMemory": 0, "MemoryReservation": 0, "MemorySwap": 0, "MemorySwappiness": null, "OomKillDisable": false, "PidsLimit": 0, "Ulimits": null, "CpuCount": 0, "CpuPercent": 0, "IOMaximumIOps": 0, "IOMaximumBandwidth": 0, "MaskedPaths": ["/ proc/asound", "/ proc/acpi" "/ proc/kcore", "/ proc/keys", "/ proc/latency_stats", "/ proc/timer_list", "/ proc/timer_stats", "/ proc/sched_debug", "/ proc/scsi", "/ sys/firmware"], "ReadonlyPaths": ["/ proc/bus", "/ proc/fs", "/ proc/irq", "/ proc/sys", "/ proc/sysrq-trigger"]} exit linux

Press Ctrl+A, then quickly press D to exit the screen command. Then, use the screen-ls command to view the current session:

$screen-lsThere is a screen on: 31169.ttys003.zylMBP (Detached) 1 Socket in / var/folders/lb/yvhs6lhx3wz8d5mdgw4w81xr0000gn/T/.screen.

Then use the kill command to kill the session:

Kill-9 31169

Exit the session completely:

Screen-wipeThere is a screen on: 31169.ttys003.zylMBP (Removed) 1 socket wiped out.No Sockets found in / var/folders/lb/yvhs6lhx3wz8d5mdgw4w81xr0000gn/T/.screen. Restart docker desktop

It is necessary to restart the docker engine, and if you skip this step, there will be a problem that the content modified by hostconfig.json will be restored.

Restart mysql container $docker start mysqlmysql check container $docker container port mysql33060/tcp-> 0.0.0.0:330603306/tcp-> 0.0.0.00.0.0.0:330603306/tcp 3306 Thank you for reading, the above is the content of "how to modify the port mapping of docker container". After the study of this article, I believe you have a deeper understanding of how to modify the port mapping of docker container, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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