module Propellor.Property.Obnam where import Propellor import qualified Propellor.Property.Apt as Apt import qualified Propellor.Property.Cron as Cron import Utility.SafeCommand import Data.List installed :: Property installed = Apt.installed ["obnam"] type ObnamParam = String -- | An obnam repository can be used by multiple clients. Obnam uses -- locking to allow only one client to write at a time. Since stale lock -- files can prevent backups from happening, it's more robust, if you know -- a repository has only one client, to force the lock before starting a -- backup. Using OnlyClient allows propellor to do so when running obnam. data NumClients = OnlyClient | MultipleClients deriving (Eq) -- | Installs a cron job that causes a given directory to be backed -- up, by running obnam with some parameters. -- -- If the directory does not exist, or exists but is completely empty, -- this Property will immediately restore it from an existing backup. -- -- So, this property can be used to deploy a directory of content -- to a host, while also ensuring any changes made to it get backed up. -- And since Obnam encrypts, just make this property depend on a gpg -- key, and tell obnam to use the key, and your data will be backed -- up securely. For example: -- -- > & Obnam.backup "/srv/git" "33 3 * * *" -- > [ "--repository=sftp://2318@usw-s002.rsync.net/~/mygitrepos.obnam" -- > , "--encrypt-with=1B169BE1" -- > ] Obnam.OnlyClient -- > `requires` Gpg.keyImported "1B169BE1" "root" -- > `requires` Ssh.keyImported SshRsa "root" -- -- How awesome is that? backup :: FilePath -> Cron.CronTimes -> [ObnamParam] -> NumClients -> Property backup dir crontimes params numclients = cronjob `describe` desc `requires` restored dir params where desc = dir ++ " backed up by obnam" cronjob = Cron.niceJob ("obnam_backup" ++ dir) crontimes "root" "/" $ intercalate ";" $ catMaybes [ if numclients == OnlyClient then Just $ unwords $ [ "obnam" , "force-lock" ] ++ map shellEscape params else Nothing , Just $ unwords $ [ "obnam" , "backup" , shellEscape dir ] ++ map shellEscape params ] -- | Restores a directory from an obnam backup. -- -- Only does anything if the directory does not exist, or exists, -- but is completely empty. -- -- The restore is performed atomically; restoring to a temp directory -- and then moving it to the directory. restored :: FilePath -> [ObnamParam] -> Property restored dir params = Property (dir ++ " restored by obnam") go `requires` installed where go = ifM (liftIO needsRestore) ( do warningMessage $ dir ++ " is empty/missing; restoring from backup ..." liftIO restore , noChange ) needsRestore = null <$> catchDefaultIO [] (dirContents dir) restore = withTmpDirIn (takeDirectory dir) "obnam-restore" $ \tmpdir -> do ok <- boolSystem "obnam" $ [ Param "restore" , Param "--to" , Param tmpdir ] ++ map Param params let restoreddir = tmpdir ++ "/" ++ dir ifM (pure ok <&&> doesDirectoryExist restoreddir) ( do void $ tryIO $ removeDirectory dir renameDirectory restoreddir dir return MadeChange , return FailedChange ) -- | apt sources.list lines for obnam. -- -- Only adds anything for Stable; use in order to get a newer version of -- obnam than is is Stable. aptSources :: Apt.SourcesGenerator aptSources Stable = ["deb http://code.liw.fi/debian wheezy main"] aptSources _ = [] -- | Key used by the code.liw.fi repository. aptKey :: Apt.AptKey aptKey = Apt.AptKey "obnam" $ unlines [ "-----BEGIN PGP PUBLIC KEY BLOCK-----" , "Version: GnuPG v1.4.9 (GNU/Linux)" , "" , "mQGiBEfzuTgRBACcVNG/H6QJqLx5qiQs2zmPe6D6BWOWHfgNgG4IWzNstm21YDxb" , "KqwFG0gxcnZJGHkXAhkSfqTokYd0lc5eBemcA1pkceNjzMEX8wwiZ810HzJD4eEH" , "sjoWR8+qKrZeixzZqReAfqztcXoBGKQ0u1R1vpg1txUa75OM4BUqaUbsmwCgmS4x" , "DjMxSaUSPuu6vQ7ZGZBXSP0D/RQw8DBHMfsv3DiaqFqk8tkuUkpMFPIekHidSHlO" , "EACbncqbbyHksyCpFNVNcQIDHrOLjOZK9BAXkSd8I3ww7U+nLdDcCblrW8CZnJtm" , "ZYrxfaXaHZ/It9/RCAsQ+c8xtmyUPjsf//4Vf8olxNQHzgBSe5/LJRi4Vd53he+K" , "YP4LA/9IZbjvVmm8+8Y0pQrTHlI6nTImtzdBXHc4+T3lLBj9XODHLozC2kSBOQky" , "q/EisTITHTXL8vYg4NsKm5RTbPAuBwdtxcny8CXfOqKtGOdrebmKotGllTozzdPv" , "9p53cuce6oJ2oMUodc074JOGTWwDSgLiJX4nViGcU1wy/vtQnrQkY29kZS5saXcu" , "ZmkgYXJjaGl2ZSBrZXkgPGxpd0BsaXcuZmk+iGAEExECACAFAkfzuTgCGwMGCwkI" , "BwMCBBUCCAMEFgIDAQIeAQIXgAAKCRBG53tJR95LscKrAJ0ZtKqa2x6Kplwa2mzx" , "ItImbIGMJACdETqofDYzUN91yLAFlOnxAyrE+UyIRgQQEQIABgUCSFd5GgAKCRAf" , "u5W/LZrMjqr8AJ4xPVHpW8ZNlgMwDSVb075RnA2DiACgg2SR69jAHFQOWV6xfLRr" , "vh0bLKGJAhwEEAEIAAYFAktEyIwACgkQ61zh116FEfm7Lg//Wiy3TjWAk8YHUddv" , "zOioYzCxQ985GsVhJGAVPqSGOc9vfTWBJZ8J3l0NnYTRpEGucmbF9G+mAt9iGXu6" , "7yZkxyFdvbo7EDsqMU1wLOM6PiU+Un63MKlbTNmFn7OKE8aXPRAFgcyUO/qjdqoD" , "sa9FgU5Z0f60m9qah6BPXH6IzMLHYoiP7t8rCBIwLgyl3w2w+Fjt1DFpbW9Kb7jz" , "i8jFvC8jPmxV8xh2OSgVZyNk4qg6hIV8GVQY7AJt8OurZSckgQd7ifHK9JTGohtF" , "tXCiqeDEvnMF4A9HI/TcXJBzonZ8ds1JCq42nSSKmL+8TyjtUSD/xHygazuc0CK0" , "hFnQWBub60IfyV6F0oTagJ8cmARv2sezHAeHDkzPHE8RdjgktazH1eJrA4LheEd6" , "KeSnVtYWpw8dgMv5PleFyQiAj/t3C/N50fd15tUyfnH15G7nFjMQV2Yx35uwSxOj" , "376OWnDN/YGTNk283XXULbyVJYR8Q2unso20XQ94yQ2A5EpHHPrHoLxrL/ydM08d" , "nvKstLZIZtal1seiMkymtlSiGz25A5oqsclwS6VZCKdWA8HO/wlElOMcaHyl6Y1y" , "gYP7y9O5yFYKFOrCH0nFjJbwmkRiBLsxuuWsYgJigVGq/atSrtawkHdshpCw0HCY" , "N/RFcWkJ864BdsO0C0sDzueNkQO5Ag0ER/O5RBAIAJiwPH9tyJTgXcC2Y4XWboOq" , "rx5CkOnr5b45oS9cK2eIJ8TKxE3XgKLxUr3mIH0QR2kZgDOwNl0WY+7/CXjn+Spn" , "BokPg54rafEUePodGpGdUXdgrHhAMHYjh8fXFJ1SlQcg46/zc1wDI7jBCkGrK3V8" , "5cXDqwTFTN5LcjoSRWeM4Voa6pEfDdL3rMlnOw9R9gDHRBBb6CDSjWXqM86pR889" , "5QrR0SDwiJNrMoyxSjMXFKGBQAsYHJ82myZrlbuZbroZjVp5Uh7eB1ZiPljNVtcr" , "sksACIWBCo1rvLzrPXsLYOeV3cDDtYAkSwGfuzC1Etbe+qgfIroFTOqdefMw4s8A" , "AwUH/0KLXm4MS54QQspg3evu4Q4U/E8Hem5/FqB0GhBCitQ4rUsucKyY8/ItpUn5" , "ismLE60bQqka+Mzd/Zw18TCTzImv0ozAaZ2sNtBado7f6jcC8EDfY5zzK1ukcsAr" , "Qc5hdLHYuTQW5KpA6fKaW969OUzIwPbdVaCOLOBpxKC6N6iBspQYd6uiQtLw6EUO" , "50oQqUiJABf0eOocvdw5e2KQQpuC3205+VMYtyl4w3pdJihK8NK0AikGXzDVsbQt" , "l8kmB5ZrN4WIKhMke1FxbqQC5Q3XATvYRzpzzisZb/HYGNti8W6du5EUwJ0D2NRh" , "cu+twocOzW0VKfmrDApfifJ9OsSISQQYEQIACQUCR/O5RAIbDAAKCRBG53tJR95L" , "seQOAJ95KUyzjRjdYgZkDC69Mgu25L86UACdGduINUaRly43ag4kwUXxpqswBBM=" , "=i2c3" , "-----END PGP PUBLIC KEY BLOCK-----" ]