Rotate nginx log files.

Author: jlesage

Dockerfile

@@ -31,7 +31,10 @@ RUN \
         certbot \
         openssl \
         apache2-utils \
+        logrotate \
         && \
+    # Adjust the logrotate config file.
+    sed-patch 's|^/var/log/messages|#/var/log/messages|' /etc/logrotate.conf && \
     # Clean some uneeded stuff from mariadb.
     rm -r \
         /var/lib/mysql \

rootfs/etc/logrotate.d/nginx

@@ -0,0 +1,14 @@
+/config/log/nginx/*.log {
+	daily
+	compress
+	rotate 14
+	missingok
+	notifempty
+	nocreate
+	nodateext
+	size 1024k
+	sharedscripts
+	postrotate
+		test ! -f /run/nginx/nginx.pid || kill -USR1 `cat /run/nginx/nginx.pid`
+	endscript
+}

rootfs/etc/services.d/logrotate/run

@@ -0,0 +1,26 @@
+#!/usr/bin/with-contenv sh
+
+set -e # Exit immediately if a command exits with a non-zero status.
+
+# Make sure we appear with a proper name under `ps`.
+if [ ! -L "$0" ]; then
+    SV_NAME="$(basename "$(pwd)")"
+    ln -sf run "$SV_NAME"
+    exec ./"$SV_NAME" "$@"
+fi
+
+log() {
+    echo "[$(basename "$0")] $*"
+}
+
+log "starting..."
+while true; do
+    s6-applyuidgid -u $USER_ID -g $GROUP_ID -G ${SUP_GROUP_IDS:-$GROUP_ID} /usr/sbin/logrotate -s /config/logrotate.status /etc/logrotate.conf
+    EXITVALUE=$?
+    if [ $EXITVALUE != 0 ]; then
+        log "exited abnormally with [$EXITVALUE]"
+    fi
+    sleep 3600
+done
+
+# vim:ft=sh:ts=4:sw=4:et:sts=4