Merge maxscale custom config with default config (#20)

Signed-off-by: Rabbani Islam Refat <[email protected]>

Author: refat75

scripts/maxscale.sh

@@ -1,14 +1,32 @@
 #!/bin/sh
 
 args="$@"
-echo "INFO" "Storing default config into /etc/maxscale/maxscale.cnf"
+echo "INFO:" "Storing default config into /etc/maxscale/maxscale.cnf"
 
-mkdir -p /etc/maxscale/maxscale.cnf.d
-cat >/etc/maxscale/maxscale.cnf <<EOL
+#mkdir -p /etc/maxscale/maxscale.cnf.d
+
+#=====================[maxscale] section started ===============================
+cat > /etc/maxscale/maxscale.cnf <<EOL
 [maxscale]
 threads=1
 log_debug=1
+persist_runtime_changes=false
+load_persisted_configs=false
+EOL
+
+if [[ "${UI:-}" == "true" ]]; then
+  cat >>/etc/maxscale/maxscale.cnf <<EOL
+
+admin_secure_gui=false
+# this enables external access to the REST API outside of localhost
+# review / modify for any public / non development environments
+admin_host=0.0.0.0
 EOL
+else
+  echo "UI is not set to true or does not exist."
+fi
+#=====================[maxscale] section end ====================================
+
 #TODO: configuration sync: among maxscale nodes, when something done in a specific maxscale
 #https://mariadb.com/kb/en/mariadb-maxscale-2402-maxscale-2402-mariadb-maxscale-configuration-guide/#runtime-configuration-changes
 #if [ "${MAXSCALE_CLUSTER:-}" == "true"  ];then
@@ -19,14 +37,14 @@ EOL
 #EOL
 #fi
 
-cat >/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+cat >> /etc/maxscale/maxscale.cnf <<EOL
 # Auto-generated server list from environment
 EOL
 
 serverList=""
 # Split HOST_LIST into an array
 for ((i=1; i<=REPLICAS; i++)); do
-  cat >> /etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+  cat >> /etc/maxscale/maxscale.cnf <<EOL
 
 [server$i]
 type=server
@@ -35,7 +53,7 @@ port=3306
 protocol=MariaDBBackend
 EOL
   if [[ "${REQUIRE_SSL:-}" == "TRUE" ]]; then
-    cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+    cat >>/etc/maxscale/maxscale.cnf <<EOL
 ssl=true
 ssl_ca=/etc/ssl/maxscale/ca.crt
 ssl_cert=/etc/ssl/maxscale/tls.crt
@@ -49,19 +67,7 @@ EOL
   serverList+="server$i"
 done
 
-if [[ "${UI:-}" == "true" ]]; then
-  cat >>/etc/maxscale/maxscale.cnf <<EOL
-
-admin_secure_gui=false
-# this enables external access to the REST API outside of localhost
-# review / modify for any public / non development environments
-admin_host=0.0.0.0
-EOL
-else
-  echo "UI is not set to true or does not exist."
-fi
-
-cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+cat >>/etc/maxscale/maxscale.cnf <<EOL
 
 [ReplicationMonitor]
 type=monitor
@@ -78,11 +84,11 @@ replication_password='$MYSQL_ROOT_PASSWORD'
 EOL
 
 if [ "${MAXSCALE_CLUSTER:-}" == "true"  ];then
-  cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+  cat >>/etc/maxscale/maxscale.cnf <<EOL
 cooperative_monitoring_locks=majority_of_running
 EOL
 fi
-cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+cat >>/etc/maxscale/maxscale.cnf <<EOL
 
 [RW-Split-Router]
 type=service
@@ -98,7 +104,7 @@ master_accept_reads=true
 enable_root_user=true
 EOL
 
-cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+cat >>/etc/maxscale/maxscale.cnf <<EOL
 
 [RW-Split-Listener]
 type=listener
@@ -107,7 +113,7 @@ protocol=MariaDBClient
 port=3306
 EOL
 if [[ "${REQUIRE_SSL:-}" == "TRUE" ]]; then
-  cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+  cat >>/etc/maxscale/maxscale.cnf <<EOL
 ssl=true
 ssl_ca=/etc/ssl/maxscale/ca.crt
 ssl_cert=/etc/ssl/maxscale/tls.crt
@@ -116,6 +122,66 @@ EOL
 fi
 
 echo "INFO: MaxScale configuration files have been successfully created."
+
+
+# Merge File1 with File2 and store it in File1
+function  merge() {
+    local tempFile=etc/maxscale/temp.cnf
+    touch "$tempFile"
+    # Match [section] headers in the first block
+    # Match key=value pairs in the second block
+    # Ignore all other lines
+    # Finally print merged configuration in the third block
+    awk '/^\[.*\]$/ {
+       section = $0
+       if (seen[section] == 0) {
+        seq[++n] = section
+        seen[section] = 1
+       }
+       next
+    }
+    /^[^=]+=[^=]+$/ {
+        split($0,kv,"=")
+        key = kv[1]
+        val = kv[2]
+        a[section, key] = val
+    }
+    END {
+       for (i = 1; i <= n; i++){
+            section = seq[i]
+            print section
+            for (k in a){
+                split(k, parts, SUBSEP)
+                if (parts[1] == section){
+                    print parts[2] "=" a[k]
+                }
+            }
+            if (i < n) print ""
+       }
+    }' $1 $2 > $tempFile
+
+    mv "$tempFile" "$1"
+
+    echo "INFO: $1 merged with $2"
+}
+
+function mergeCustomConfig() {
+    defaultConfig=/etc/maxscale/maxscale.cnf
+    customConfig=(/etc/maxscale/maxscale.custom.d/*.cnf)
+
+   #  Check if any files are found
+    if [ -e "${customConfig[0]}" ]; then
+      echo "INFO: Found custom config files"
+      for file in "${customConfig[@]}"; do
+         merge $defaultConfig  $file
+      done
+    else
+      echo "INFO: No custom config found"
+    fi
+}
+
+mergeCustomConfig
+
 IFS=' '
 set -- $args
 docker-entrypoint.sh maxscale "$@"