feat(entrypoint): set cache valid time from env (#21)

* Add CACHE_DEFAULT_TIME env

* Fix comment string

* Use env CACHE_VALID_TIME

* Update comment

Author: bro2020

entrypoint.sh

@@ -104,6 +104,12 @@ CACHE_MAX_SIZE=${CACHE_MAX_SIZE:-32g}
 # Set to 32gb which should be enough
 echo "proxy_cache_path /docker_mirror_cache levels=1:2 max_size=$CACHE_MAX_SIZE min_free=${CACHE_MIN_FREE:-1g} inactive=${CACHE_INACTIVE_TIME:-60d} keys_zone=cache:15m use_temp_path=off manager_threshold=${CACHE_MANAGER_THRESHOLD:-1000ms} manager_sleep=${CACHE_MANAGER_SLEEP:-250ms} manager_files=${CACHE_MANAGER_FILES:-100} loader_files=${CACHE_LOADER_FILES:-100} loader_threshold=${CACHE_LOADER_THRESHOLD:-200ms} loader_sleep=${CACHE_MANAGER_SLEEP:-50ms};" > /etc/nginx/conf.d/cache_max_size.conf
 
+# Set Docker Registry cache valid time, by default, 60 day ('60d')
+CACHE_VALID_TIME=${CACHE_VALID_TIME:-60d}
+
+# Set default cache valid time for 200 and 205 response.
+sed -i "/# Cache all 200, 206 for 60 days default./a\        proxy_cache_valid 200 206 ${CACHE_VALID_TIME};" /etc/nginx/nginx.conf
+
 # Manifest caching configuration. We generate config based on the environment vars.
 echo -n "" >/etc/nginx/nginx.manifest.caching.config.conf
 

nginx.conf

@@ -242,8 +242,7 @@ echo "Docker configured with HTTPS_PROXY=$scheme://$http_host/"
         proxy_cache_lock on;
         proxy_cache_lock_timeout 880s;
 
-        # Cache all 200, 206 for 60 days.
-        proxy_cache_valid 200 206 60d;
+        # Cache all 200, 206 for 60 days default.
 
         # Some extra settings to maximize cache hits and efficiency
         proxy_force_ranges on;