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This commit is contained in:
Joey Hess 2014-04-03 14:07:32 -04:00
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README.md
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@ -35,7 +35,7 @@ and so it's easy to factor out things like classes of hosts as desired.
`apt-get install propellor`
2. Run propellor for the first time. It will set up a `~/.propellor/` git
repository for you.
3. In `~/.propellor/`, use git to push the repository to a central
3. `cd ~/.propellor/`; use git to push the repository to a central
server (github, or your own git server). Configure that central
server as the origin remote of the repository.
4. If you don't have a gpg private key, generate one: `gpg --gen-key`
@ -49,19 +49,19 @@ and so it's easy to factor out things like classes of hosts as desired.
So, edit `~/.propellor/config.hs` to configure the host (maybe
start with a few simple properties), and re-run step 7.
Repeat until happy and move on to the next host. :)
9. To move beyond manually running propellor --spin against hosts
when you change configuration, add a property to your hosts
9. To move beyond manually running `propellor --spin` against hosts
when you change their properties, add a property to your hosts
like: `Cron.runPropellor "30 * * * *"`
Now they'll automatically update every 30 minutes, and you can
`git commit -S` and `git push` changes that affect any number of
hosts.
8. Write some neat new properties and send patches to <propellor@joeyh.name>!
10. Write some neat new properties and send patches to <propellor@joeyh.name>!
## security
Propellor's security model is that the hosts it's used to deploy are
untrusted, and that the central git repository server is untrusted.
untrusted, and that the central git repository server is untrusted too.
The only trusted machine is the laptop where you run `propellor --spin`
to connect to a remote host. And that one only because you have a ssh key
@ -71,13 +71,13 @@ Since the hosts propellor deploys are not trusted by the central git
repository, they have to use git:// or http:// to pull from the central
git repository, rather than ssh://.
So, to avoid a MITM attack, propellor checks that any commit it fetched
So, to avoid a MITM attack, propellor checks that any commit it fetches
from origin is gpg signed by a trusted gpg key, and refuses to deploy it
otherwise.
That is only done when privdata/keyring.gpg exists. To set it up:
gpg --gen-key # only if you don't already have a gpg key
gpg --gen-key # only if you don't already have a gpg key
propellor --add-key $MYKEYID
In order to be secure from the beginning, when `propellor --spin` is used
@ -88,9 +88,10 @@ gpg key, and will use it to verify git fetches.
Since the propoellor git repository is public, you can't store
in cleartext private data such as passwords, ssh private keys, etc.
Instead, `propellor --spin $host` looks for a `~/.propellor/privdata/$host.gpg` file and
if found decrypts it and sends it to the remote host using ssh. This lets
a remote host know its own private data, without seeing all the rest.
Instead, `propellor --spin $host` looks for a
`~/.propellor/privdata/$host.gpg` file and if found decrypts it and sends
it to the remote host using ssh. This lets a remote host know its own
private data, without seeing all the rest.
To securely store private data, use: `propellor --set $host $field`
The field name will be something like 'Password "root"'; see PrivData.hs