add basic redis

.gitattributes

@@ -0,0 +1 @@
+*.sh text eol=lf

Dockerfile

@@ -7,6 +7,10 @@ ENV DIFFIE_HELLMAN='' \
     FORCE_HTTPS='true' \
     SITES='' \
     LETSENCRYPT_URL='https://acme-v02.api.letsencrypt.org/directory' \
+    STORAGE_ADAPTER='file' \
+    REDIS_HOST='' \
+    REDIS_DB='' \
+    REDIS_KEY_PREFIX='' \
     RESOLVER_ADDRESS='8.8.8.8'
 
 # Here we install open resty and generate dhparam.pem file.

entrypoint.sh

@@ -59,7 +59,7 @@ fi
 
 
 # let's substitute $ALLOWED_DOMAINS, $LETSENCRYPT_URL and $RESOLVER_ADDRESS into OpenResty configuration
-envsubst '$ALLOWED_DOMAINS,$LETSENCRYPT_URL,$RESOLVER_ADDRESS' \
+envsubst '$ALLOWED_DOMAINS,$LETSENCRYPT_URL,$RESOLVER_ADDRESS,$STORAGE_ADAPTER,$REDIS_HOST,$REDIS_DB,$REDIS_KEY_PREFIX' \
   < ${RESTY_CONF_DIR}/resty-http.conf \
   > ${RESTY_CONF_DIR}/resty-http.conf.copy \
   && mv ${RESTY_CONF_DIR}/resty-http.conf.copy ${RESTY_CONF_DIR}/resty-http.conf

snippets/resty-http.conf

@@ -1,7 +1,7 @@
 # The "auto_ssl" shared dict should be defined with enough storage space to
 # hold your certificate data. 1MB of storage holds certificates for
 # approximately 100 separate domains.
-lua_shared_dict auto_ssl 1m;
+lua_shared_dict auto_ssl 10m;
 
 # The "auto_ssl" shared dict is used to temporarily store various settings
 # like the secret used by the hook server on port 8999. Do not change or
@@ -27,6 +27,15 @@ init_by_lua_block {
       return ngx.re.match(domain, '$ALLOWED_DOMAINS', 'ijo')
     end)
 
+    if "$STORAGE_ADAPTER" == "redis" then
+        auto_ssl:set("storage_adapter", "resty.auto-ssl.storage_adapters.redis")
+        auto_ssl:set("redis", {
+          host = "$REDIS_HOST",
+          db = "$REDIS_DB",
+          prefix = "$REDIS_KEY_PREFIX"
+        })
+    end
+
     auto_ssl:init()
 }