podman-container-runlabel.1.md

% PODMAN(1) Podman Man Pages % Brent Baude % September 2018

NAME

podman-container-runlabel - Execute Image Label Method

SYNOPSIS

podman container runlabel [-h|--help] [--display] [-n][--name[=NAME]] [--rootfs=ROOTFS] [--set=NAME=VALUE] [--storage] [--replace] LABEL IMAGE [ARG...]

DESCRIPTION

podman container runlabel reads the provided LABEL field in the container IMAGE and executes the provided value for the label as a command. If this field does not exist, podman container runlabel will just exit.

If the container image has a LABEL INSTALL instruction like the following:

LABEL INSTALL /usr/bin/podman run -t -i --rm \${OPT1} --privileged -v /:/host --net=host --ipc=host --pid=host -e HOST=/host -e NAME=\${NAME} -e IMAGE=\${IMAGE} -e CONFDIR=\/etc/${NAME} -e LOGDIR=/var/log/\${NAME} -e DATADIR=/var/lib/\${NAME} \${IMAGE} \${OPT2} /bin/install.sh \${OPT3}

podman container runlabel will set the following environment variables for use in the command:

If the container image does not have the desired label, an error message will be displayed along with a non-zero return code. If the image is not found in local storage, Podman will attempt to pull it first.

Note: Podman will always ensure that podman is the first argument of the command being executed.

LABEL The label name specified via the command.

IMAGE Image name specified via the command.

SUDO_UID The SUDO_UID environment variable. This is useful with the podman -u option for user space tools. If the environment variable is not available, the value of /proc/self/loginuid is used.

SUDO_GID The SUDO_GID environment variable. This is useful with the podman -u option for user space tools. If the environment variable is not available, the default GID of the value for SUDO_UID is used. If this value is not available, the value of /proc/self/loginuid is used.

Any additional arguments will be appended to the command.

OPTIONS:

--authfile

Path of the authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json, which is set using podman login. If the authorization state is not found there, $HOME/.docker/config.json is checked, which is set using docker login.

Note: You can also override the default path of the authentication file by setting the REGISTRY_AUTH_FILE environment variable. export REGISTRY_AUTH_FILE=path

--display

Display the label's value of the image having populated its environment variables. The runlabel command will not execute if --display is specified.

--cert-dir path

Use certificates at path (*.crt, *.cert, *.key) to connect to the registry. Default certificates directory is /etc/containers/certs.d.

--creds

The [username[:password]] to use to authenticate with the registry if required. If one or both values are not supplied, a command line prompt will appear and the value can be entered. The password is entered without echo.

--help -h Print usage statement

--name -n=""

Use this name for creating content for the container. NAME will default to the IMAGENAME if it is not specified.

--quiet, -q

Suppress output information when pulling images

--replace

If a container exists of the default or given name, as needed it will be stopped, deleted and a new container will be created from this image.

--signature-policy="PATHNAME"

Pathname of a signature policy file to use. It is not recommended that this option be used, as the default behavior of using the system-wide default policy (frequently /etc/containers/policy.json) is most often preferred

--tls-verify

Require HTTPS and verify certificates when contacting registries (default: true). If explicitly set to true, then TLS verification will be used. If set to false, then TLS verification will not be used. If not specified, TLS verification will be used unless the target registry is listed as an insecure registry in registries.conf

Examples

Execute the run label of an image called foobar.

$ sudo podman container runlabel run foobar

Execute the install label of an image called foobar with additional arguments.

$ sudo podman container runlabel install foobar apples oranges

Display the command that would be executed by runlabel.

$ sudo podman container runlabel --display run foobar

SEE ALSO

podman(1)

HISTORY

September 2018, Originally compiled by Brent Baude (bbaude at redhat dot com)