From 03bb1b9770457ccb66f95102095be6b9520bdede Mon Sep 17 00:00:00 2001
From: Erik Sundell <erik.i.sundell@gmail.com>
Date: Wed, 6 May 2020 09:53:29 +0200
Subject: [PATCH] coredns: readiness- and livenessProbe tweaks

The readinessProbe was delaying the startup of coredns greatly. This
change brings startup times from ~15s to ~2-3s when testing locally. A
reduction of ~80%.

The livenessProbe would also take potentially more than a minute to
be declared unhealthy and restarted which is now tweaked down to about
30 seconds

For more information about the probes, see: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#configure-probes
---
 manifests/coredns.yaml | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/manifests/coredns.yaml b/manifests/coredns.yaml
index f53b65807c..66305ea049 100644
--- a/manifests/coredns.yaml
+++ b/manifests/coredns.yaml
@@ -143,18 +143,20 @@ spec:
             port: 8080
             scheme: HTTP
           initialDelaySeconds: 60
-          timeoutSeconds: 5
+          periodSeconds: 10
+          timeoutSeconds: 1
           successThreshold: 1
-          failureThreshold: 5
+          failureThreshold: 3
         readinessProbe:
           httpGet:
             path: /ready
             port: 8181
             scheme: HTTP
-          initialDelaySeconds: 10
-          timeoutSeconds: 5
+          initialDelaySeconds: 0
+          periodSeconds: 2
+          timeoutSeconds: 1
           successThreshold: 1
-          failureThreshold: 5
+          failureThreshold: 3
       dnsPolicy: Default
       volumes:
         - name: config-volume