terraform-http-backend-pass (empty) → 0.1.0.0
raw patch · 13 files changed
+1012/−0 lines, 13 filesdep +aesondep +basedep +bytestringsetup-changed
Dependencies added: aeson, base, bytestring, directory, mtl, optparse-applicative, optparse-generic, servant, servant-server, shelly, terraform-http-backend-pass, text, warp
Files
- CHANGELOG.md +5/−0
- LICENSE +661/−0
- README.md +69/−0
- Setup.hs +2/−0
- app/Main.hs +6/−0
- src/Terraform/HttpBackend/Pass/Api.hs +102/−0
- src/Terraform/HttpBackend/Pass/App.hs +57/−0
- src/Terraform/HttpBackend/Pass/Crypt.hs +9/−0
- src/Terraform/HttpBackend/Pass/Env.hs +8/−0
- src/Terraform/HttpBackend/Pass/Git.hs +10/−0
- src/Terraform/HttpBackend/Pass/Options.hs +12/−0
- src/Terraform/HttpBackend/Pass/Run.hs +21/−0
- terraform-http-backend-pass.cabal +50/−0
+ CHANGELOG.md view
@@ -0,0 +1,5 @@+# Revision history for terraform-http-backend-pass++## 0.1.0.0 -- 2021-02-28++* First version. Released on an unsuspecting world.
+ LICENSE view
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If not, see <https://www.gnu.org/licenses/>.++Also add information on how to contact you by electronic and paper mail.++ If your software can interact with users remotely through a computer+network, you should also make sure that it provides a way for users to+get its source. For example, if your program is a web application, its+interface could display a "Source" link that leads users to an archive+of the code. There are many ways you could offer source, and different+solutions will be better for different programs; see section 13 for the+specific requirements.++ You should also get your employer (if you work as a programmer) or school,+if any, to sign a "copyright disclaimer" for the program, if necessary.+For more information on this, and how to apply and follow the GNU AGPL, see+<https://www.gnu.org/licenses/>.
+ README.md view
@@ -0,0 +1,69 @@+# Terraform HTTP Backend Pass++**Catchy name! What does it do?**++According to [terraform+docs](https://www.terraform.io/docs/language/settings/backends/index.html):++> Each Terraform configuration can specify a backend, which defines where and+> how operations are performed, where state snapshots are stored, etc.++There are a few backends which terraform provides, none of which are very+customizable. The [http+backend](https://www.terraform.io/docs/language/settings/backends/http.html),+however, provides a way to define where (and how) state snapshots are stored. It+additionally allows for a locking the state while some operation is being+perfomed.++This project aims to provide a backend to store the terraform state in a git+repository. As the state can contain sensitive information, it should be+encrypted before storing, for which [`pass`](https://www.passwordstore.org/) is+used.++## How to use++1. Install the backend in one of these ways:+ - Using [Stack](https://docs.haskellstack.org/en/stable/README/):+ ```bash+ stack install terraform-http-backend-pass+ ```+ - Using [Cabal](https://www.haskell.org/cabal/):+ ```bash+ cabal install terraform-http-backend-pass+ ```+ - Using [nix](https://nixos.org/):+ ```bash+ nix-env -f https://git.coop/akshay/terraform-http-backend-pass/-/archive/main/terraform-http-backend-pass-main.tar.gz -i+ ```+2. Create a pass repository:+ ```bash+ export PASSWORD_STORE_DIR=/desired/path/to/store+ pass init <gpg-keys>+ pass git init+ ```+3. Push the repository somewhere, set push upstream:+ ```bash+ export PASSWORD_STORE_DIR=/desired/path/to/store+ pass git remote add origin <remote-url>+ pass git push -u origin master+ ```+4. Start the backend:+ ```bash+ terraform-http-backend-pass --repositoryPath /desired/path/to/store --port 8888 + ```+5. Setup terraform with backend information:+ ```tf+ terraform {+ backend "http" {+ # Or, something else if the server is not running on localhost+ address = "http://localhost:8888"+ }+ }+ ```+ The address can also be specified dynamically using the `-backend-config`+ option while running `terraform init`+6. Use terraform as usual:+ ```bash+ terraform init+ terraform apply+ ```
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ app/Main.hs view
@@ -0,0 +1,6 @@+module Main where++import Terraform.HttpBackend.Pass.Run (run)++main :: IO ()+main = run
+ src/Terraform/HttpBackend/Pass/Api.hs view
@@ -0,0 +1,102 @@+{-# LANGUAGE DataKinds #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE TypeApplications #-}+{-# LANGUAGE TypeFamilies #-}+{-# LANGUAGE TypeOperators #-}++module Terraform.HttpBackend.Pass.Api where++import Control.Monad (unless)+import Data.Aeson (ToJSON (..), Value, (.=))+import qualified Data.Aeson as Aeson+import qualified Data.Aeson.Text as Aeson+import qualified Data.ByteString.Lazy as LBS+import Data.Proxy (Proxy (..))+import Data.Text (Text)+import qualified Data.Text.Encoding as Text+import qualified Data.Text.Lazy as LText+import GHC.Generics (Generic)+import Servant+import Servant.API.Generic (ToServant, ToServantApi)+import qualified Servant.Server.Generic as Servant+import Terraform.HttpBackend.Pass.App (AppT)+import Terraform.HttpBackend.Pass.Crypt (MonadPass (..))+import Terraform.HttpBackend.Pass.Git (MonadGit (..))++data StateNotFound = StateNotFound++instance HasStatus StateNotFound where+ type StatusOf StateNotFound = 404++instance ToJSON StateNotFound where+ toJSON _ = Aeson.object ["error" .= ("state not found" :: Text)]++newtype StateCorrupt = StateCorrupt {err :: String}++instance HasStatus StateCorrupt where+ type StatusOf StateCorrupt = 500++instance ToJSON StateCorrupt where+ toJSON (StateCorrupt err) =+ Aeson.object+ [ "error" .= ("state corrupt" :: Text),+ "message" .= err+ ]++type GetResponse = '[WithStatus 200 Value, StateNotFound, StateCorrupt]++type GetState = "state" :> Capture "name" Text :> UVerb 'GET '[JSON] GetResponse++type UpdateState = "state" :> Capture "name" Text :> ReqBody '[JSON] Value :> PostNoContent++type DeleteState = "state" :> Capture "name" Text :> DeleteNoContent++type Api = GetState :<|> UpdateState :<|> DeleteState++api :: Proxy Api+api = Proxy++server :: (Monad m, MonadPass m, MonadGit m) => ServerT Api m+server =+ getStateImpl+ :<|> updateStateImpl+ :<|> purgeStateImpl++getStateImpl :: (Monad m, MonadGit m, MonadPass m) => Text -> m (Union GetResponse)+getStateImpl name = do+ gitPull+ let path = stateFilePath name+ stateExists <- exists path+ if stateExists+ then do+ eitherState <-+ Aeson.eitherDecode @Value . LBS.fromStrict . Text.encodeUtf8+ <$> decrypt path+ case eitherState of+ Left err -> respond $ StateCorrupt err+ Right state -> respond (WithStatus @200 state)+ else respond StateNotFound++updateStateImpl :: (Monad m, MonadPass m, MonadGit m) => Text -> Value -> m NoContent+updateStateImpl name tfstate = do+ gitPull+ let path = stateFilePath name+ -- Also commits+ encrypt path $ LText.toStrict $ Aeson.encodeToLazyText tfstate++ gitPush+ pure NoContent++purgeStateImpl :: (MonadGit m, MonadPass m, Monad m) => Text -> m NoContent+purgeStateImpl name = do+ gitPull+ let path = stateFilePath name+ stateExists <- exists path+ unless stateExists $ do+ purge (stateFilePath name)+ gitPush+ pure NoContent++stateFilePath :: Text -> Text+stateFilePath name = name <> "/terraform.tfstate"
+ src/Terraform/HttpBackend/Pass/App.hs view
@@ -0,0 +1,57 @@+{-# LANGUAGE DerivingStrategies #-}+{-# LANGUAGE FlexibleContexts #-}+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE RecordWildCards #-}++module Terraform.HttpBackend.Pass.App where++import Control.Monad.IO.Class (MonadIO, liftIO)+import Control.Monad.Reader (MonadReader (ask), ReaderT (runReaderT))+import Data.Text (Text)+import qualified Data.Text as Text+import Shelly (shelly)+import qualified Shelly+import System.Directory (doesFileExist)+import Terraform.HttpBackend.Pass.Crypt (MonadPass (..))+import Terraform.HttpBackend.Pass.Env (Env (..))+import Terraform.HttpBackend.Pass.Git (MonadGit (..))++newtype AppT m a = AppT {unAppT :: ReaderT Env m a}+ deriving newtype (Functor, Applicative, Monad, MonadReader Env, MonadIO)++instance MonadIO m => MonadGit (AppT m) where+ gitAdd path = runGit_ ["add", path]+ gitCommit message = runGit_ ["commit", "-m", message]+ gitPush = runGit_ ["push"]+ gitPull = runGit_ ["pull", "--rebase"]+ gitRm path = runGit_ ["rm", path]++runGit_ :: (MonadIO m, MonadReader Env m) => [Text] -> m ()+runGit_ args = do+ Env {..} <- ask+ shelly $ Shelly.run_ "git" (["-C", Text.pack directory] ++ args)++instance (Monad m, MonadIO m) => MonadPass (AppT m) where+ encrypt name secret = do+ Env {..} <- ask+ shelly $ do+ Shelly.setenv "PASSWORD_STORE_DIR" (Text.pack directory)+ Shelly.setStdin secret+ Shelly.run_ "pass" ["insert", "-m", name]+ decrypt name = do+ Env {..} <- ask+ shelly $ do+ Shelly.setenv "PASSWORD_STORE_DIR" (Text.pack directory)+ Shelly.run "pass" [name]+ purge name = do+ Env {..} <- ask+ shelly $ do+ Shelly.setenv "PASSWORD_STORE_DIR" (Text.pack directory)+ Shelly.run_ "pass" ["rm", name]+ exists name = do+ Env {..} <- ask+ liftIO $ doesFileExist (directory <> "/" <> Text.unpack name)++runAppT :: Env -> AppT m a -> m a+runAppT env (AppT r) = runReaderT r env
+ src/Terraform/HttpBackend/Pass/Crypt.hs view
@@ -0,0 +1,9 @@+module Terraform.HttpBackend.Pass.Crypt where++import Data.Text (Text)++class MonadPass m where+ encrypt :: Text -> Text -> m ()+ decrypt :: Text -> m Text+ purge :: Text -> m ()+ exists :: Text -> m Bool
+ src/Terraform/HttpBackend/Pass/Env.hs view
@@ -0,0 +1,8 @@+{-# LANGUAGE RecordWildCards #-}+module Terraform.HttpBackend.Pass.Env where++import Terraform.HttpBackend.Pass.Options (Options(..))+newtype Env = Env { directory :: FilePath}++mkEnv :: Options -> Env+mkEnv Options {..}= Env { directory = repositoryPath }
+ src/Terraform/HttpBackend/Pass/Git.hs view
@@ -0,0 +1,10 @@+module Terraform.HttpBackend.Pass.Git where++import Data.Text (Text)++class MonadGit m where+ gitAdd :: Text -> m ()+ gitCommit :: Text -> m ()+ gitPush :: m ()+ gitPull :: m ()+ gitRm :: Text -> m ()
+ src/Terraform/HttpBackend/Pass/Options.hs view
@@ -0,0 +1,12 @@+{-# LANGUAGE DeriveGeneric #-}++module Terraform.HttpBackend.Pass.Options where++import GHC.Generics (Generic)+import Options.Applicative+import Options.Generic (ParseRecord)++data Options = Options {repositoryPath :: FilePath, port :: Int}+ deriving (Generic)++instance ParseRecord Options
+ src/Terraform/HttpBackend/Pass/Run.hs view
@@ -0,0 +1,21 @@+{-# LANGUAGE OverloadedStrings #-}++module Terraform.HttpBackend.Pass.Run where++import Data.Function ((&))+import qualified Network.Wai.Handler.Warp as Warp+import Options.Generic+import qualified Servant.Server as Servant+import qualified Terraform.HttpBackend.Pass.Api as Api+import Terraform.HttpBackend.Pass.App (runAppT)+import Terraform.HttpBackend.Pass.Env (Env, mkEnv)+import qualified Terraform.HttpBackend.Pass.Options as Options++run :: IO ()+run = do+ opts <- getRecord "Terraform HTTP Backend using Pass and Git"+ let env = mkEnv opts+ Warp.run (Options.port opts) (Servant.serve Api.api (hoistServer env))++hoistServer :: Env -> Servant.ServerT Api.Api Servant.Handler+hoistServer env = Servant.hoistServer Api.api (runAppT env) Api.server
+ terraform-http-backend-pass.cabal view
@@ -0,0 +1,50 @@+cabal-version: >=1.10+name: terraform-http-backend-pass+version: 0.1.0.0+license-file: LICENSE+license: AGPL+author: Akshay Mankar+maintainer: itsakshaymankar@gmail.com+copyright: 2021 Akshay Mankar+homepage: https://github.com/akshaymankar/terraform-http-backend-pass#readme+bug-reports: https://github.com/akshaymankar/terraform-http-backend-pass/issues+build-type: Simple+category: Terraform+synopsis: HTTP backend to store terraform state using pass and git+description: Please see the README on GitHub at <https://github.com/akshaymankar/terraform-http-backend-pass#readme>+extra-source-files: CHANGELOG.md+ , README.md++source-repository head+ type: git+ location: https://github.com/akshaymankar/terraform-http-backend-pass++executable terraform-http-backend-pass+ main-is: Main.hs+ hs-source-dirs: app+ build-depends: base >=4.14 && <5+ , terraform-http-backend-pass+ default-language: Haskell2010++library+ hs-source-dirs: src+ default-language: Haskell2010+ build-depends: base >= 4.14 && <5+ , aeson+ , bytestring+ , directory+ , mtl+ , optparse-applicative+ , optparse-generic+ , servant+ , servant-server+ , shelly+ , text+ , warp+ exposed-modules: Terraform.HttpBackend.Pass.Api+ , Terraform.HttpBackend.Pass.App+ , Terraform.HttpBackend.Pass.Crypt+ , Terraform.HttpBackend.Pass.Env+ , Terraform.HttpBackend.Pass.Git+ , Terraform.HttpBackend.Pass.Options+ , Terraform.HttpBackend.Pass.Run