propellor - property-based host configuration management in haskell
`propellor` is a property-based host configuration management program written
and configured in haskell.
# MODES OF OPERATION
* propellor --init
Get started by initializing a `~/.propellor/` repository.
After this, you'll edit `~/.propellor/config.hs` to configure propellor.
Once propellor is configured, running it without any options will take
action as needed to satisfy the configured properties of the local host.
If there's a central git repository, it will first fetch from it,
check the gpg signature and merge, and rebuild propellor,
so that any configuration changes will immediately take effect.
If propellor is run by a non-root user without any options, this is
the same as running propellor --spin with the hostname of the local
* propellor --spin targethost [targethost ...] [--via relayhost]
Causes propellor to automatically install itself on the specified target
host, or if it's already installed there, push any updates. Propellor is
then run on the target host, to satisfy its configured properties.
A signed git commit is made by --spin, so that any changes you have made
get propagated to the target host.
Multiple target hosts can be specified; propellor will run on each of
them in sequence.
When run with --via, propellor sshes to the relay host and runs
`propellor --spin hostname` from there. This can be useful when
propellor is installing itself, since most of the data transfer
is done between relay host and target host. Note that propellor
uses ssh agent forwarding to make this work, and the relay host
sees any privdata belonging to the target host.
Propellor configuration typically uses the FQDN of hosts.
The hostname given to --spin can be a short name, which is
then looked up in the DNS to find the FQDN.
* propellor --build
Causes propellor to build itself, checking that your config.hs, etc are
You do not need to run this as a separate step; propellor automatically
builds itself when using things like --spin.
* propellor --add-key keyid
Adds a gpg key, which is used to encrypt the privdata.
Multiple gpg keys can be added; the privdata will be encrypted so that
all of them can decrypt it.
If the gpg secret key is present, git is configured to sign commits
using this key. Propellor requires signed commits when pulling from
a central git repository.
* propellor --rm-key keyid
Stops encrypting the privdata to a gpg key.
* propellor --list-fields
Lists all privdata fields that are used by your propellor configuration.
The first 2 columns are the field name and context, and are followed by
a list of the hosts that use that privdata value.
* propellor --set field context
Sets a field of privdata. The content is read in from stdin.
* propellor --unset field context
Removes a value from the privdata store.
* propellor --unset-unused
Removes all values from the privdata store that are not currently in use.
* propellor --dump field context
Outputs the privdata value to stdout.
* propellor --edit field context
Opens $EDITOR on the privdata value.
* propellor --merge
Combine multiple --spin commits into a single, more useful commit.
When using propellor, you may find yourself repeatedly running
`propellor --spin` until you get things working the way you like.
This results in a lot of git commits being made, with incremental
To clean that up to a single commit, use `propellor --merge`. A normal
interactive git commit will then be made, consisting of all changes
that have been previously committed by --spin, since the last time a
normal git commit was made.
(This will result in a trapezoid pattern in gitk.)
* propellor --check
If propellor is able to run, this simply exits successfully.
* propellor hostname
When run with a hostname and no other options, propellor will
provision the local host with the configuration of that hostname.
This is useful when the local host doesn't yet have its hostname set
This is the default config file used by propellor.
If propellor is run in a directory containing a config.hs, it
assumes that the current directory is a propellor repository, and
uses the configuration from the current directory, rather tnan
Set `PROPELLOR_DEBUG=1` to make propellor output each command it runs and
other debugging information.
# GIT CONFIGURATION
`git config propellor.debug 1` will configure propellor to output debugging
`git config propellor.spin-branch foo` will configure propellor to refuse to
spin when the foo branch is not checked out.
`git config propellor.forbid-dirty-spin true` will configure propellor to refuse
to spin when there are uncommitted changes in the `~/.propellor` repository.
`git config propellor.buildsystem stack` makes propellor use stack for
building itself, rather than the default cabal. This only controls the
local build of propellor; Hosts can have properties set to control how
propellor is built on them.
The usual git configuration controls which centralized repository (if any)
propellor pushes and pulls from.
Additionally, the url of a remote named "deploy", if it exists
in your ~/.propellor/ repository, is used as the origin url for
the other repositories.
Joey Hess <email@example.com>
Warning: Automatically converted into a man page by mdwn2man. Edit with care.