salt.modules.nspawn

Manage nspawn containers

New in version 2015.8.0.

systemd-nspawn(1) is a tool used to manage lightweight namespace containers. This execution module provides several functions to help manage these containers.

Minions running systemd >= 219 will place new containers in /var/lib/machines, while those running systemd < 219 will place them in /var/lib/container.

salt.modules.nspawn.bootstrap_container(name, dist=None, version=None)

Bootstrap a container from package servers, if dist is None the os the minion is running as will be created, otherwise the needed bootstrapping tools will need to be available on the host.

CLI Example:

salt myminion nspawn.bootstrap_container <name>
salt.modules.nspawn.bootstrap_salt(name, config=None, approve_key=True, install=True, pub_key=None, priv_key=None, bootstrap_url=None, force_install=False, unconditional_install=False, bootstrap_delay=None, bootstrap_args=None, bootstrap_shell=None)

Bootstrap a container from package servers, if dist is None the os the minion is running as will be created, otherwise the needed bootstrapping tools will need to be available on the host.

CLI Example:

salt '*' nspawn.bootstrap_salt arch1
salt.modules.nspawn.copy_to(name, *args, **kwargs)

Copy a file from the host into a container

name
Container name
source
File to be copied to the container
dest
Destination on the container. Must be an absolute path.
overwrite
: False
Unless this option is set to True, then if a file exists at the location specified by the dest argument, an error will be raised.

makedirs : False

Create the parent directory on the container if it does not already exist.

CLI Example:

salt 'minion' nspawn.copy_to /tmp/foo /root/foo
salt.modules.nspawn.disable(name, *args, **kwargs)

Set the named container to not be launched at boot

CLI Example:

salt myminion nspawn.enable <name>
salt.modules.nspawn.enable(name, *args, **kwargs)

Set the named container to be launched at boot

CLI Example:

salt myminion nspawn.enable <name>
salt.modules.nspawn.exists(name)

Returns true if the named container exists

CLI Example:

salt myminion nspawn.exists <name>
salt.modules.nspawn.info(name, **kwargs)

Return info about a container

Note

The container must be running for machinectl to gather information about it. If the container is stopped, then this function will start it.

start
: False
If True, then the container will be started to retrieve the info. A Started key will be in the return data if the container was started.

CLI Example:

salt myminion nspawn.info arch1
salt myminion nspawn.info arch1 force_start=False
salt.modules.nspawn.list_all()

Lists all nspawn containers

CLI Example:

salt myminion nspawn.list_all
salt.modules.nspawn.list_running()

Lists running nspawn containers

Note

nspawn.list also works to list running containers

CLI Example:

salt myminion nspawn.list_running
salt myminion nspawn.list
salt.modules.nspawn.list_stopped()

Lists stopped nspawn containers

CLI Example:

salt myminion nspawn.list_stopped
salt.modules.nspawn.pid(name, *args, **kwargs)

Returns the PID of a container

name
Container name

CLI Example:

salt myminion nspawn.pid arch1
salt.modules.nspawn.poweroff(name)

Issue a clean shutdown to the container. Equivalent to running machinectl poweroff on the named container.

For convenience, running nspawn.stop``(as shown in the CLI examples below) is equivalent to running ``nspawn.poweroff.

Note

machinectl poweroff is only supported in systemd >= 219. On earlier systemd versions, running this function will simply issue a clean shutdown via systemctl.

CLI Examples:

salt myminion nspawn.poweroff arch1
salt myminion nspawn.stop arch1
salt.modules.nspawn.pull_dkr(url, name, index)

Execute a machinectl pull-dkr to download a docker image and add it to /var/lib/machines as a new container.

Note

Requires systemd >= 219

url
URL from which to download the container
name
Name for the new container
index
URL of the Docker index server from which to pull (must be an http:// or https:// URL).

CLI Examples:

salt myminion nspawn.pull_dkr centos/centos6 cent6 index=https://get.docker.com
salt myminion nspawn.pull_docker centos/centos6 cent6 index=https://get.docker.com
salt.modules.nspawn.pull_raw(url, name, verify=False)

Execute a machinectl pull-raw to download a .qcow2 or raw disk image, and add it to /var/lib/machines as a new container.

Note

Requires systemd >= 219

url
URL from which to download the container
name
Name for the new container
verify
: False
Perform signature or checksum verification on the container. See the machinectl(1) man page (section titled "Image Transfer Commands") for more information on requirements for image verification. To perform signature verification, use verify=signature. For checksum verification, use verify=checksum. By default, no verification will be performed.

CLI Examples:

salt myminion nspawn.pull_raw http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/21/Cloud/Images/x86_64/Fedora-Cloud-Base-20141203-21.x86_64.raw.xz fedora21
salt.modules.nspawn.pull_tar(url, name, verify=False)

Execute a machinectl pull-raw to download a .tar container image, and add it to /var/lib/machines as a new container.

Note

Requires systemd >= 219

url
URL from which to download the container
name
Name for the new container
verify
: False
Perform signature or checksum verification on the container. See the machinectl(1) man page (section titled "Image Transfer Commands") for more information on requirements for image verification. To perform signature verification, use verify=signature. For checksum verification, use verify=checksum. By default, no verification will be performed.

CLI Examples:

salt myminion nspawn.pull_tar http://foo.domain.tld/containers/archlinux-2015.02.01.tar.gz arch2
salt.modules.nspawn.reboot(name, *args, **kwargs)

Reboot the container by sending a SIGINT to its init process. Equivalent to running machinectl reboot on the named container.

For convenience, running nspawn.restart (as shown in the CLI examples below) is equivalent to running nspawn.reboot.

Note

machinectl reboot is only supported in systemd >= 219. On earlier systemd versions, running this function will instead restart the container via systemctl.

CLI Examples:

salt myminion nspawn.reboot arch1
salt myminion nspawn.restart arch1
salt.modules.nspawn.remove(name, *args, **kwargs)

Remove the named container

Warning

This function will remove all data associated with the container. It will not, however, remove the btrfs subvolumes created by pulling container images (nspawn.pull_raw, nspawn.pull_tar, nspawn.pull_dkr).

stop
: False
If True, the container will be destroyed even if it is running/frozen.

CLI Examples:

salt '*' nspawn.remove foo
salt '*' nspawn.remove foo stop=True
salt.modules.nspawn.retcode(name, cmd, no_start=False, preserve_state=True, stdin=None, python_shell=True, output_loglevel=u'debug', use_vt=False, ignore_retcode=False, keep_env=None)

Run cmd.retcode within a container

name
Name of the container in which to run the command
cmd
Command to run
no_start
: False
If the container is not running, don't start it
preserve_state
: True
After running the command, return the container to its previous state
stdin
: None
Standard input to be used for the command
output_loglevel
: debug
Level at which to log the output from the command. Set to quiet to suppress logging.
use_vt
: False
Use SaltStack's utils.vt to stream output to console. Assumes output=all.
keep_env
: None
If not passed, only a sane default PATH environment variable will be set. If True, all environment variables from the container's host will be kept. Otherwise, a comma-separated list (or Python list) of environment variable names can be passed, and those environment variables will be kept.

CLI Example:

salt myminion nspawn.retcode mycontainer 'ip addr show'
salt.modules.nspawn.run(name, cmd, no_start=False, preserve_state=True, stdin=None, python_shell=True, output_loglevel=u'debug', use_vt=False, ignore_retcode=False, keep_env=None)

Run cmd.run within a container

name
Name of the container in which to run the command
cmd
Command to run
no_start
: False
If the container is not running, don't start it
preserve_state
: True
After running the command, return the container to its previous state
stdin
: None
Standard input to be used for the command
output_loglevel
: debug
Level at which to log the output from the command. Set to quiet to suppress logging.
use_vt
: False
Use SaltStack's utils.vt to stream output to console.
keep_env
: None
If not passed, only a sane default PATH environment variable will be set. If True, all environment variables from the container's host will be kept. Otherwise, a comma-separated list (or Python list) of environment variable names can be passed, and those environment variables will be kept.

CLI Example:

salt myminion nspawn.run mycontainer 'ifconfig -a'
salt.modules.nspawn.run_all(name, cmd, no_start=False, preserve_state=True, stdin=None, python_shell=True, output_loglevel=u'debug', use_vt=False, ignore_retcode=False, keep_env=None)

Run cmd.run_all within a container

Note

While the command is run within the container, it is initiated from the host. Therefore, the PID in the return dict is from the host, not from the container.

name
Name of the container in which to run the command
cmd
Command to run
no_start
: False
If the container is not running, don't start it
preserve_state
: True
After running the command, return the container to its previous state
stdin
: None
Standard input to be used for the command
output_loglevel
: debug
Level at which to log the output from the command. Set to quiet to suppress logging.
use_vt
: False
Use SaltStack's utils.vt to stream output to console. Assumes output=all.
keep_env
: None
If not passed, only a sane default PATH environment variable will be set. If True, all environment variables from the container's host will be kept. Otherwise, a comma-separated list (or Python list) of environment variable names can be passed, and those environment variables will be kept.

CLI Example:

salt myminion nspawn.run_all mycontainer 'ip addr show'
salt.modules.nspawn.run_stderr(name, cmd, no_start=False, preserve_state=True, stdin=None, python_shell=True, output_loglevel=u'debug', use_vt=False, ignore_retcode=False, keep_env=None)

Run cmd.run_stderr within a container

name
Name of the container in which to run the command
cmd
Command to run
no_start
: False
If the container is not running, don't start it
preserve_state
: True
After running the command, return the container to its previous state
stdin
: None
Standard input to be used for the command
output_loglevel
: debug
Level at which to log the output from the command. Set to quiet to suppress logging.
use_vt
: False
Use SaltStack's utils.vt to stream output to console. Assumes output=all.
keep_env
: None
If not passed, only a sane default PATH environment variable will be set. If True, all environment variables from the container's host will be kept. Otherwise, a comma-separated list (or Python list) of environment variable names can be passed, and those environment variables will be kept.

CLI Example:

salt myminion nspawn.run_stderr mycontainer 'ip addr show'
salt.modules.nspawn.run_stdout(name, cmd, no_start=False, preserve_state=True, stdin=None, python_shell=True, output_loglevel=u'debug', use_vt=False, ignore_retcode=False, keep_env=None)

Run cmd.run_stdout within a container

name
Name of the container in which to run the command
cmd
Command to run
no_start
: False
If the container is not running, don't start it
preserve_state
: True
After running the command, return the container to its previous state
stdin
: None
Standard input to be used for the command
output_loglevel
: debug
Level at which to log the output from the command. Set to quiet to suppress logging.
use_vt
: False
Use SaltStack's utils.vt to stream output to console. Assumes output=all.
keep_env
: None
If not passed, only a sane default PATH environment variable will be set. If True, all environment variables from the container's host will be kept. Otherwise, a comma-separated list (or Python list) of environment variable names can be passed, and those environment variables will be kept.

CLI Example:

salt myminion nspawn.run_stdout mycontainer 'ifconfig -a'
salt.modules.nspawn.start(name, *args, **kwargs)

Start the named container

CLI Example:

salt myminion nspawn.start <name>
salt.modules.nspawn.state(name, *args, **kwargs)

Return state of container (running or stopped)

CLI Example:

salt myminion nspawn.state <name>
salt.modules.nspawn.terminate(name)

Kill all processes in the container without issuing a clean shutdown. Equivalent to running machinectl terminate on the named container.

For convenience, running nspawn.stop and passing kill=True (as shown in the CLI examples below) is equivalent to running nspawn.terminate.

Note

machinectl terminate is only supported in systemd >= 219. On earlier systemd versions, running this function will simply issue a clean shutdown via systemctl.

CLI Examples:

salt myminion nspawn.terminate arch1
salt myminion nspawn.stop arch1 kill=True