What does build mean in docker?

In docker, build means "create"; this command is used to build a Docker image based on the given Dockerfile and context. The syntax is "docker build [OPTIONS] PATH | URL | -", Dockerfile It is a text file used to build an image. The text content contains the instructions and instructions required to build the image.

The operating environment of this tutorial: linux7.3 system, docker version 19.03, Dell G3 computer.

What does build mean in docker

The docker build command is used to create an image using a Dockerfile.

Syntax

docker build [OPTIONS] PATH | URL | -

OPTIONS Description:

• --build-arg=[]: Set variables when creating the image;

• --cpu-shares: Set cpu usage weight;

• --cpu-period: Limit CPU CFS cycle;

• --cpu-quota: Limit the CPU CFS quota;

• --cpuset-cpus: Specify the CPU id used;

• --cpuset-mems: Specify the memory id used;

• --disable-content-trust: Ignore verification, enabled by default ;

• -f: Specify the Dockerfile path to be used;

• --force-rm: Delete the intermediate container during the mirroring process;

• --isolation: Use container isolation technology;

• --label=[]: Set the metadata used by the image;

• -m: Set the maximum memory value;

• --memory-swap: Set the maximum value of Swap to memory swap, "-1" means no limit swap;

• --no-cache: The process of creating the image does not use cache;

• --pull: Try to update the new image of the image Version;

• --quiet, -q: Quiet mode, only the image ID will be output after success;

• --rm: The image is set successfully Then delete the intermediate container;

• --shm-size: Set the size of /dev/shm, the default value is 64M;

• -- ulimit: Ulimit configuration.

• --squash: Compress all operations in the Dockerfile into one layer.

• --tag, -t: The name and tag of the image, usually in the format of name:tag or name; multiple tags can be set for one image in one build.

• --network: default default. Set the network mode of the RUN command during build

##The example is as follows:

Use the Dockerfile in the current directory to create an image with the label runoob /ubuntu:v1.

docker build -t runoob/ubuntu:v1 .

Use the Dockerfile of URL github.com/creack/docker-firefox to create the image.

docker build github.com/creack/docker-firefox

You can also pass -f the location of the Dockerfile file:

$ docker build -f /path/to/a/Dockerfile .

Before the Docker daemon executes the instructions in the Dockerfile, it will first perform a syntax check on the Dockerfile. If there is a syntax error, it will return:

$ docker build -t test/myapp .
Sending build context to Docker daemon 2.048 kB
Error response from daemon: Unknown instruction: RUNCMD

Recommended learning: "

docker video tutorial"

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