Initial working docker-templater+caddy version

docker-compose.yml

@@ -6,11 +6,11 @@ services:
     command: ["./hostman.sh", "&", "wait", "$!" ]
     volumes:
       - /var/run/docker.sock:/tmp/docker.sock:ro
-      - /etc/hosts:/config/hosts:rw
       - ./script/hostman.sh:/hostman.sh:ro
       - ./script/docker-templater.sh:/docker-templater.sh:ro
-      - ./templates:/templates
-      - ./config:/config
+      - ./templates:/templates:ro
+      - ./config:/config:rw
+      - /etc/hosts:/config/hosts:rw
     networks:
       - proxy
   proxy:
@@ -19,8 +19,8 @@ services:
       - "80:80"
       - "443:443"
     volumes:
-      - /var/run/docker.sock:/tmp/docker.sock:ro
-      - ./config/Caddyfile:/etc/caddy/Caddyfile
+      - ./config/Caddyfile:/etc/caddy/Caddyfile:ro
+      - ./caddy_data:/data/caddy
     networks:
       - proxy
 

script/docker-templater.sh

@@ -6,7 +6,9 @@ DOCKER_DATA=$2;
 
 NETWORK_NAME="${NETWORK_NAME:-proxy}"
 
-# "NetworkSettings"
+get_date() {
+    printf '%s' "$(date +'%Y.%m.%d_%H:%M:%S')"
+}
 
 # Import Template
 # Required Variables:
@@ -19,17 +21,18 @@ NETWORK_NAME="${NETWORK_NAME:-proxy}"
 # Optional Functions:
 # - label_hook :: modify/override label query results
 # - template_hook :: hook to verify/modify template rsults (0 => OK; 1 => SKIP)
+# - finally_hook :: gets executed after (and also only if) the final result has been written to disk
 
 if [ -f "${TEMPLATE_SRC}" ]
 then
     source "${TEMPLATE_SRC}"
     if [ -z "${TEMPLATE}" ]
     then
-        echo "[ERR]: Template \"${TEMPLATE_SRC}\" does define a template string."
+        printf '%s | [ERR]: Template "%s" does define a template string.\n' "$(get_date)" "${TEMPLATE_SRC}"
         exit 1
     fi
 else
-    echo "[ERR]: No such File \"${TEMPLATE_SRC}\".";
+    printf '%s | [ERR]: No such File "%s".\n' "$(get_date)" "${TEMPLATE_SRC}";
     exit 1
 fi
 
@@ -48,6 +51,14 @@ else
     RUN_TEMPLATE_HOOK=false
 fi
 
+if type finally_hook 2>/dev/null | grep -q "finally_hook is a function"
+then
+    RUN_FINALLY_HOOK=true
+else
+    RUN_FINALLY_HOOK=false
+fi
+
+
 if [ -z "${SEPARATOR+.}" ]
 then
     SEPARATOR='\n'
@@ -104,15 +115,19 @@ do
     done
 done
 
-RESULT="$(printf "%b" "${WRAP_START}" "${RESULT}" "${WRAP_END}")"
+RESULT="$(printf "%s" "${WRAP_START}" "${RESULT}" "${WRAP_END}")"
 
 if [ -z "${OUT}" ]
 then
     printf "%b" "${RESULT}";
 else
-    if [ "$(cat "${OUT}")" != "${RESULT}" ]
+    if [ "$(cat "${OUT}")" != "$(printf '%b'"${RESULT}")" ]
     then
-        printf "%s | Template Task: '%s' has been written to: '%s'\n" "$(date --iso-8601)" "${TEMPLATE_SRC}" "${OUT}"
+        printf "%s | Template Task: '%s' has been written to: '%s'\n" "$(get_date)" "${TEMPLATE_SRC}" "${OUT}"
         printf "%b" "${RESULT}" > "${OUT}";
+        if ${RUN_FINALLY_HOOK}
+        then
+            finally_hook
+        fi
     fi
 fi

script/hostman.sh

@@ -6,22 +6,31 @@ NETWORK_NAME="${NETWORK_NAME:-proxy}"
 TEMPLATER_PATH="${TEMPLATER_PATH:-/docker-templater.sh}"
 TEMPLATE_FOLDER_PATH="${TEMPLATE_FOLDER_PATH:-/templates}"
 
+get_date() {
+    printf '%s' "$(date +'%Y.%m.%d_%H:%M:%S')"
+}
+
 query_docker () {
     curl --unix-socket $DOCKER_SOCK_PATH --silent -g http://v1.41/$1$2
 }
 
 update_templates() {
     CONTAINER_LIST=$(query_docker "containers/json" "?filters={%22network%22:[%22${NETWORK_NAME}%22],%22status%22:[%22running%22]}")
-    if [ "${CONTAINER_LIST}" != "${OLD_CONTAINER_LIST}" ]
+    LABELS_NEW="$(echo "${CONTAINER_LIST}" | jq '.[].Labels | @base64' | sort)"
+    if [ "${LABELS_NEW}" != "${LABELS_OLD}" ]
     then
+        if [ -n "${LABELS_OLD}" ]
+        then
+            printf '%s | Container label list change detected.\n' "$(get_date)"
+        fi
+        LABELS_OLD="${LABELS_NEW}"
         for template in "${TEMPLATE_FOLDER_PATH}"/*
         do
             if ! "${TEMPLATER_PATH}" "${template}" "${CONTAINER_LIST}"
             then
-                echo "Error Processing Template: ${template}"
+                printf '%s | Error Processing Template: %s\n' "$(get_date)" "${template}"
             fi
         done
-        OLD_CONTAINER_LIST="${CONTAINER_LIST}"
     fi
 }
 
@@ -31,11 +40,14 @@ update_templates
 # cannot filter because reailine no longer recognized lines otherwise (check how IFS changes)
 query_docker "events" | while  true
 do
+    printf '%s | Listening for docker events\n' "$(get_date)"
     read -r;
     # wait for related events to finish
+    printf '%s | Waiting for event messages to settle.\n' "$(get_date)"
     while [ $? -eq 0 ]
     do
         read -t 8 -r
     done
+    printf '%s | Checking for changes in container label list.\n' "$(get_date)"
     update_templates
 done

templates/caddy.sh

@@ -4,9 +4,9 @@ DOCKER_SOCK_PATH="${DOCKER_SOCK_PATH:-/tmp/docker.sock}"
 DOCKER_CADDY_NAME="${DOCKER_CADDY_NAME:-proxy}"
 DOCKER_CADDY_PORT="${DOCKER_CADDY_PORT:-2020}"
 
-WRAP_START='{\n  admin :2020\n}\n'
+WRAP_START='{\n\tadmin :2020\n}\n'
 WRAP_END='\n'
-TEMPLATE='${LOCAL_WEB_HOST} {\n  reverse_proxy ${LOCAL_IP}:$LOCAL_WEB_PORT\n}'
+TEMPLATE='${LOCAL_WEB_HOST} {\n\treverse_proxy ${LOCAL_IP}:$LOCAL_WEB_PORT\n}'
 SEPARATOR='\n'
 OUT='/config/Caddyfile'
 
@@ -15,19 +15,18 @@ label_hook() {
 }
 
 template_hook() {
-    printf "%s" "${PARTIAL_RESULT}"
-    if grep '^[^ ]\+ {\\n  reverse_proxy \(?::\|[.0-9a-e]\)\+\:[0-9]\+\\n}$' <<< "${PARTIAL_RESULT}"
+    if grep -q '^[^ ]\+ {\\n\\treverse_proxy \(?::\|[.0-9a-e]\)\+\:[0-9]\+\\n}$' <<< "${PARTIAL_RESULT}"
     then
         return 0;
     fi
     return 1;
 }
 
-# finally_hook() {
-#     if curl --silent -g "${DOCKER_CADDY_NAME}:${DOCKER_CADDY_PORT}/load"
-#     then
-#         printf "Updated Caddy Config"
-#     else
-#         printf "Failed to update Caddy Config"
-#     fi
-# }
+finally_hook() {
+    if curl --silent "${DOCKER_CADDY_NAME}:${DOCKER_CADDY_PORT}/load" -H "Content-Type: text/caddyfile" --data-binary "@${OUT}"
+    then
+        printf '%s | Updated Caddy Config\n' "$(get_date)"
+    else
+        printf '%s | Failed to update Caddy Config\n' "$(get_date)"
+    fi
+}

templates/sqlproxy.sh

@@ -4,16 +4,16 @@ set -e
 WRAP_START='[\n'
 if ${EXCLUDE_USERPASS}
 then
-    TEMPLATE='  { type: "${LOCAL_DB_TYPE}", host: "${LOCAL_DB_HOST}", port: "${LOCAL_DB_PORT}" }'
+    TEMPLATE='  { "type": "${LOCAL_DB_TYPE}", "host": "${LOCAL_DB_HOST}", "port": "${LOCAL_DB_PORT}" }'
 else
-    TEMPLATE='  { type: "${LOCAL_DB_TYPE}", user: "${LOCAL_DB_USER}", password: "${LOCAL_DB_PASSWORD}", host: "${LOCAL_DB_HOST}", port: "${LOCAL_DB_PORT}" }'
+    TEMPLATE='  { "type": "${LOCAL_DB_TYPE}", "user": "${LOCAL_DB_USER}", "password": "${LOCAL_DB_PASSWORD}", "host": "${LOCAL_DB_HOST}", "port": "${LOCAL_DB_PORT}" }'
 fi
 SEPARATOR=',\n'
 WRAP_END='\n]'
 OUT="/config/sqlproxy.json"
 
 template_hook() {
-    if grep -q 'type: "(?mysql|psql)".*host: ".+", port: "\d+"'
+    if grep -q '"type": "(?mysql|psql)".*"host": ".+", port: "\d+"' <<< "${PARTIAL_RESULT}"
     then
         return 0
     fi