From 98d0d61958bb84917212f133f769ed3cdaa88c70 Mon Sep 17 00:00:00 2001
From: Deni Bertovic <deni@denibertovic.com>
Date: Tue, 18 Jun 2019 10:09:47 +0200
Subject: [PATCH] Adds /healthz endpoint

And points k8s readiness and liveness probes on it
---
 config/routes                             | 1 +
 etc/helm/templates/deployment.yaml        | 4 ++--
 etc/helm/templates/hoogle_deployment.yaml | 4 ++--
 src/Handler/Home.hs                       | 4 ++++
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/config/routes b/config/routes
index 61d1506..604f234 100644
--- a/config/routes
+++ b/config/routes
@@ -8,6 +8,7 @@
 /sitemap.xml SitemapR GET
 
 / HomeR GET
+/healthz HealthzR GET
 /snapshots AllSnapshotsR GET
 
 /snapshot/#Text/*Texts OldSnapshotR GET
diff --git a/etc/helm/templates/deployment.yaml b/etc/helm/templates/deployment.yaml
index 132efdb..6bf9003 100644
--- a/etc/helm/templates/deployment.yaml
+++ b/etc/helm/templates/deployment.yaml
@@ -32,7 +32,7 @@ spec:
                   key: PGCONN
           readinessProbe:
             httpGet:
-              path: /
+              path: /healthz
               port: 3000
               httpHeaders:
                 # Works around stackage-server's `forceSSL` redirect
@@ -44,7 +44,7 @@ spec:
             successThreshold: 1
           livenessProbe:
             httpGet:
-              path: /
+              path: /healthz
               port: 3000
               httpHeaders:
                 # Works around stackage-server's `forceSSL` redirect
diff --git a/etc/helm/templates/hoogle_deployment.yaml b/etc/helm/templates/hoogle_deployment.yaml
index 48290e1..a68d79a 100644
--- a/etc/helm/templates/hoogle_deployment.yaml
+++ b/etc/helm/templates/hoogle_deployment.yaml
@@ -32,7 +32,7 @@ spec:
                   key: PGCONN
           readinessProbe:
             httpGet:
-              path: /
+              path: /healthz
               port: 3000
               httpHeaders:
                 # Works around stackage-server's `forceSSL` redirect
@@ -44,7 +44,7 @@ spec:
             successThreshold: 1
           livenessProbe:
             httpGet:
-              path: /
+              path: /healthz
               port: 3000
               httpHeaders:
                 # Works around stackage-server's `forceSSL` redirect
diff --git a/src/Handler/Home.hs b/src/Handler/Home.hs
index 66243b6..a4aa4ca 100644
--- a/src/Handler/Home.hs
+++ b/src/Handler/Home.hs
@@ -5,6 +5,7 @@
 {-# LANGUAGE ViewPatterns #-}
 module Handler.Home
     ( getHomeR
+    , getHealthzR
     , getAuthorsR
     , getInstallR
     , getOlderReleasesR
@@ -15,6 +16,9 @@ import Import
 import Stackage.Database
 import Yesod.GitRepo (grContent)
 
+getHealthzR :: Handler String
+getHealthzR = return "OK"
+
 -- This is a handler function for the G request method on the HomeR
 -- resource pattern. All of your resource patterns are defined in
 -- config/routes