feat(nginx): retain at least 1g free in cache directory

Author: ChandonPierre

entrypoint.sh

@@ -102,7 +102,7 @@ CACHE_MAX_SIZE=${CACHE_MAX_SIZE:-32g}
 
 # The cache directory. This can get huge. Better to use a Docker volume pointing here!
 # 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:-0} inactive=${CACHE_INACTIVE_TIME:-60d} keys_zone=cache:10m use_temp_path=off manager_threshold=${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=${CACHE_MANAGER_SLEEP:-50ms};" > /etc/nginx/conf.d/cache_max_size.conf
+echo "proxy_cache_path /docker_mirror_cache levels=1:2 max_size=$CACHE_MAX_SIZE min_free=${CACHE_MIN_FREE:-1g} inactive=${CACHE_INACTIVE_TIME:-60d} keys_zone=cache:10m 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
 
 # Manifest caching configuration. We generate config based on the environment vars.
 echo -n "" >/etc/nginx/nginx.manifest.caching.config.conf