From 7115d1ec162b4059b3e8e8f84bd8d5898c1db025 Mon Sep 17 00:00:00 2001 From: Joey Hess Date: Wed, 14 May 2014 19:41:05 -0400 Subject: moved source code to src This is to work around OSX's brain-damange regarding filename case insensitivity. Avoided moving config.hs, because it's a config file. Put in a symlink to make build work. --- src/Propellor/Property/Obnam.hs | 155 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 src/Propellor/Property/Obnam.hs (limited to 'src/Propellor/Property/Obnam.hs') diff --git a/src/Propellor/Property/Obnam.hs b/src/Propellor/Property/Obnam.hs new file mode 100644 index 00000000..32374b57 --- /dev/null +++ b/src/Propellor/Property/Obnam.hs @@ -0,0 +1,155 @@ +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 + +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 + ) + +installed :: Property +installed = Apt.installed ["obnam"] + +-- | Ensures that a recent version of obnam gets installed. +-- +-- Only does anything for Debian Stable. +latestVersion :: Property +latestVersion = withOS "obnam latest version" $ \o -> case o of + (Just (System (Debian suite) _)) | isStable suite -> ensureProperty $ + Apt.setSourcesListD (sources suite) "obnam" + `requires` toProp (Apt.trustsKey key) + _ -> noChange + where + sources suite = + [ "deb http://code.liw.fi/debian " ++ Apt.showSuite suite ++ " main" + ] + -- gpg key used by the code.liw.fi repository. + key = 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-----" + ] -- cgit v1.2.3