create entrypoint for checking an/or generating domain files both public and smarthost proxies

entrypoint.sh

@@ -0,0 +1,152 @@
+#!/bin/sh
+
+# Debugging function
+debug() {
+        if [ $DEBUG -eq 1 ]; then
+                echo "DEBUG: "$1 $2 $3
+        fi; 
+}
+
+SOURCE=$SMARTHOST_PROXY_IP
+TARGET=$TARGET
+DOMAIN=$DOMAIN
+PORT=$PORT
+PUBLIC_PROXY_PATH=$PUBLIC_PROXY_PATH
+
+# ADDITIONAL VARIABLES
+ROLES=$ROLES
+
+# turn on debug mode by extra option "debug"
+      if [[ "$(echo "$EXTRA_OPTIONS" | grep debug)" != "" ]] ; then
+              DEBUG=1
+      fi;
+
+
+# finding IPv4 addresses from application names.
+name_resolver() {
+
+	local DNS_IP
+	local DNS=$1
+	APP_IP=""
+
+	echo "DNS: "$DNS;
+		
+	for D in $(echo $DNS);
+	do
+		
+		UP=$(docker ps --format '{{.Names}}\t{{.Status}}' | grep Up | awk '{print $1}' | grep $D"-") ;
+		# filtering for ROLES variables if exists.
+		
+		if [[ "$ROLES" != "null" && ! -z "$ROLES" ]]; then                                                
+                                                                                                                  
+                        UPS=""                                                                                    
+                        for ROLE in $(echo $ROLES); do
+				FILTERED_BY_ROLE=$(docker inspect $UP -f '{{.Config.Labels.roles}}' | uniq | grep $ROLE)
+				if [[ "$(echo $FILTERED_BY_ROLE)" != "" ]]; then                                             
+					UPS="$UPS $UP";
+                                fi
+                        done 
+                                                                                                
+                        UP=$UPS                                                                                              
+                fi              
+
+		if [ ! -z "$UP" ] ; then
+			for D_IP in `echo $UP` ; 
+			do
+				DNS_IP=$(docker inspect $D_IP -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}');	
+				APP_IP="$APP_IP $DNS_IP";
+				echo "APP_IP: "$APP_IP;
+			done
+		else
+			debug "no matching running process found for indentiying application IP addresses, exiting."
+			exit;
+		fi
+
+	done;
+}
+
+# GETTING APPLICATIONS IP ADDRESSES
+
+if [ ! -z "$SOURCE" ]; then 
+	IDX=0
+	for i in $(echo $SOURCE) ; do
+	
+		name_resolver $i;
+		debug "source ip is $APP_IP";
+		for IP in $(echo $APP_IP); do
+			IDX=$(expr 1 + $IDX)
+			eval SOURCE_IP_$IDX=$IP;
+		done;
+		
+	done
+
+fi
+
+IDX=0
+for i in $(echo $TARGET) ; do
+	
+       name_resolver $i;
+       debug "target ip is $APP_IP";
+       for IP in $(echo $APP_IP); do
+		IDX=$(expr 1 + $IDX)
+		eval TARGET_IP_$IDX=$IP;
+	done;
+	
+done
+
+# CHECKING WHETHER IS IT NEEDED TO USE PUBLIC PROXY SERVICE
+if [ "$PUBLIC_PROXY_PATH" != "" ]; then
+	# check domain config file exits
+
+	if [[ -f "$PUBLIC_PROXY_PATH/$DOMAIN" ]] || \
+	[[ "$(jq -r .DOMAIN $PUBLIC_PROXY_PATH/$DOMAIN)" == "$DOMAIN"  &&  "$(jq -r .LOCAL_IP $PUBLIC_PROXY_PATH/$DOMAIN)" == "$SOURCE" ]]; then
+	
+		echo "Nothing to do."
+	else
+		#Create public proxy domain file
+
+		echo '
+		{
+		"DOMAIN": "'$DOMAIN'",
+		"ALIASES_HTTP": [ ],
+		"ALIASES_HTTPS": [ ],
+		"LOCAL_IP": "'$SOURCE'",
+		"HTTP_PORT": "80",
+		"HTTPS_PORT": "443",
+		"ERROR_PAGE": "",
+		"REDIRECT_HTTP": "",
+		"REDIRECT_HTTPS": ""
+		}
+		 ' | jq -r . > $PUBLIC_PROXY_PATH/$DOMAIN
+	fi
+fi
+
+# CHECKING WHETHER IS IT NEEDED TO USE SMARTHOST PROXY SERVICE
+if [ "$SMARTHOST_PROXY_PATH" != "" ]; then
+	# check domain config file exits
+
+	if [[ -f "$SMARTHOST_PROXY_PATH/$DOMAIN" ]] || \
+	[[ "$(jq -r .DOMAIN $SMARTHOST_PROXY_PATH/$DOMAIN)" == "$DOMAIN"  &&  "$(jq -r .LOCAL_IP $SMARTHOST_PROXY_PATH/$DOMAIN)" == "$TARGET" \
+	&& "$(jq -r .HTTP_PORT $SMARTHOST_PROXY_PATH/$DOMAIN)" == "$PORT"]]; then
+	
+		echo "Nothing to do."
+	else
+		#Create public proxy domain file
+
+		echo '
+		{
+		"DOMAIN": "'$DOMAIN'",
+		"ALIASES_HTTP": [ ],
+		"ALIASES_HTTPS": [ ],
+		"LOCAL_IP": "'$TARGET'",
+		"HTTP_PORT": "'$PORT'",
+		"HTTPS_PORT": "443",
+		"ERROR_PAGE": "",
+		"REDIRECT_HTTP": "https://'$DOMAIN'",
+		"REDIRECT_HTTPS": "",
+		"MAX_BODY_SIZE": "512M"
+		}
+		 ' | jq -r . > $SMARTHOST_PROXY_PATH/$DOMAIN
+	fi
+fi
+