Rotate nginx logs (#601)

* Rotate nginx logs

* Create logrotate.sh

* Update Dockerfile

* Update entrypoint.sh

* Update Dockerfile

* Update logrotate.sh

* No reason to disable logrotate

* Update logrotate.sh

* Update entrypoint.sh

* typo

* Avoid useless output

* Use gosu

util/Nginx/Dockerfile

@@ -13,12 +13,14 @@ COPY proxy.conf /etc/nginx
 COPY mime.types /etc/nginx
 COPY security-headers.conf /etc/nginx
 COPY security-headers-ssl.conf /etc/nginx
+COPY logrotate.sh /
 COPY entrypoint.sh /
 
 EXPOSE 8080
 EXPOSE 8443
 
-RUN chmod +x /entrypoint.sh
+RUN chmod +x /entrypoint.sh \
+    && chmod +x /logrotate.sh
 
 HEALTHCHECK CMD curl --insecure -Lfs https://localhost:8443/alive || curl -Lfs http://localhost:8080/alive || exit 1
 

util/Nginx/entrypoint.sh

@@ -41,4 +41,8 @@ chown -R $USERNAME:$GROUPNAME /var/run/nginx
 chown -R $USERNAME:$GROUPNAME /var/cache/nginx
 chown -R $USERNAME:$GROUPNAME /var/log/nginx
 
+# Launch a loop to rotate nginx logs on a daily basis
+
+gosu $USERNAME:$GROUPNAME /bin/sh -c "/logrotate.sh loop >/dev/null 2>&1 &"
+
 exec gosu $USERNAME:$GROUPNAME nginx -g 'daemon off;'

util/Nginx/logrotate.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+while true
+do
+  [ "$1" == "loop" ] && sleep $((24 * 3600 - (`date +%H` * 3600 + `date +%M` * 60 + `date +%S`)))
+  ts=$(date +%Y%m%d_%H%M%S)
+  mv /var/log/nginx/access.log /var/log/nginx/access.$ts.log
+  mv /var/log/nginx/error.log /var/log/nginx/error.$ts.log
+  kill -USR1 `cat /var/run/nginx/nginx.pid`
+  sleep 1
+  gzip /var/log/nginx/access.$ts.log
+  gzip /var/log/nginx/error.$ts.log
+  find /var/log/nginx/ -name "*.gz" -mtime +32 -delete
+  [ "$1" != "loop" ] && break
+done