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other versions
- jessie-backports 0.1.1+dfsg1-1~bpo8+1
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- testing 1.0.0~rc6+dfsg1-2
- unstable 1.0.0~rc6+dfsg1-3
| NAME() | NAME() |
runc spec - create a new specification file
To run docker's hello-world container one needs to set the args parameter in the spec to call hello. This can be done using the sed command or a text editor. The following commands create a bundle for hello-world, change the default args parameter in the spec from "sh" to "/hello", then run the hello command in a new hello-world container named container1:
In the start command above, "container1" is the name for the instance
of the container that you are starting. The name you provide for the container
instance must be unique on your host.
When starting a container through runc, runc needs root privilege. If not
already running as root, you can use sudo to give runc root privilege. For
example: "sudo runc start container1" will give runc root privilege
to start the container on your host.
SYNOPSIS¶
runc spec [command options] [arguments...]DESCRIPTION¶
The spec command creates the new specification file named "config.json" for the bundle. The spec generated is just a starter file. Editing of the spec is required to achieve desired results. For example, the newly generated spec includes an args parameter that is initially set to call the "sh" command when the container is started. Calling "sh" may work for an ubuntu container or busybox, but will not work for containers that do not include the "sh" program. EXAMPLE:To run docker's hello-world container one needs to set the args parameter in the spec to call hello. This can be done using the sed command or a text editor. The following commands create a bundle for hello-world, change the default args parameter in the spec from "sh" to "/hello", then run the hello command in a new hello-world container named container1:
mkdir hello cd hello docker pull hello-world docker export $(docker create hello-world) > hello-world.tar mkdir rootfs tar -C rootfs -xf hello-world.tar runc spec sed -i 's;"sh";"/hello";' config.json runc start container1