From 7608cc1112eeda9cb6b5f0d1a9c8dd11f9b2cb17 Mon Sep 17 00:00:00 2001
From: hangy <hangy@hangy.de>
Date: Wed, 26 Sep 2018 14:49:55 +0200
Subject: [PATCH] Log the Log4Perl output to a sidecar container to make it
 available to Kubernetes.ton

---
 docker/kubernetes/backend-conf.yaml       |  2 +-
 docker/kubernetes/backend-deployment.yaml | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/docker/kubernetes/backend-conf.yaml b/docker/kubernetes/backend-conf.yaml
index 8e3a363ab9b07..2d898d7847474 100644
--- a/docker/kubernetes/backend-conf.yaml
+++ b/docker/kubernetes/backend-conf.yaml
@@ -399,7 +399,7 @@ data:
     log4perl.rootLogger=TRACE, LOGFILE
 
     log4perl.appender.LOGFILE=Log::Log4perl::Appender::File
-    log4perl.appender.LOGFILE.filename=/mnt/podata/logs/log4perl.log
+    log4perl.appender.LOGFILE.filename=/var/log/log4perl.log
     log4perl.appender.LOGFILE.mode=append
 
     log4perl.appender.LOGFILE.layout=PatternLayout
diff --git a/docker/kubernetes/backend-deployment.yaml b/docker/kubernetes/backend-deployment.yaml
index 53a856a83de61..970082bcf2d2a 100644
--- a/docker/kubernetes/backend-deployment.yaml
+++ b/docker/kubernetes/backend-deployment.yaml
@@ -34,6 +34,8 @@ spec:
               mountPath: "/opt/product-opener/html/images/products/"
             - name: data
               mountPath: "/mnt/podata/"
+            - name: varlog
+              mountPath: "/var/log"
       containers:
         - name: po-backend
           image: openfoodfacts/productopener-backend
@@ -56,6 +58,14 @@ spec:
               mountPath: "/opt/product-opener/html/images/products/"
             - name: data
               mountPath: "/mnt/podata/"
+            - name: varlog
+              mountPath: "/var/log"
+        - name: po-backend-log4perl
+          image: busybox
+          volumeMounts:
+            - name: varlog
+              mountPath: "/var/log"
+          args: [/bin/sh, -c, 'tail -n+1 -f /var/log/log4perl.log']
       volumes:
         - name: backend-config
           configMap:
@@ -66,3 +76,5 @@ spec:
         - name: data
           persistentVolumeClaim:
             claimName: po-data
+        - name: varlog
+          emptyDir: {}