created wrapper script for nats-server config

scripts/nats-server/README.md

@@ -0,0 +1,31 @@
+# nats-server configuration
+
+This folder contains several scripts to help out setting up the nats-server configuration.
+
+You can run each script individually, or you can use one of the wrapper scripts.
+
+## docker-compose
+
+ Create a directory where you want your docker compose files, and enter that directory
+ 
+ Clone the steward repository:
+
+```bash
+mkdir my_dir
+cd my_dir
+git clone https://github.com/RaaLabs/steward.git
+```
+
+Execute the wrapper script with the following arguments:
+
+`./steward/scripts/nats-server/wrapper.sh <LetsEncrypt Cert file> <LetsEncrypt Key file> <nats-server listen port>`
+
+```bash
+./steward/scripts/nats-server/wrapper.sh ../some/dir/le.crt ../some/dir/le.key 50222
+```
+
+This will create all files needed, but you need to add user configuration to the **nats.conf** file manually.
+
+A template for the central steward instance are added by default, but **you need** to edit the file and replace the **`FILL-IN...`** fields with your central user key, and **organization name** according to the naming you want to use as node names. **Read more about the naming in the main README.md.**
+
+**NB**: LetsEncrypt certificate can be generated by using <https://github.com/RaaLabs/certupdater>

scripts/nats-server/create-docker-compose-files/main.go

@@ -16,7 +16,7 @@ import (
 func generateEnv(templateFile string, eData envData) error {
 	tpl, err := template.ParseFiles(templateFile)
 	if err != nil {
-		return fmt.Errorf("error: parsing template file: %v, err: %v", templateFile, err)
+		return fmt.Errorf("error: parsing template file, check that the templateDir flag is set to the correct path: %v, err: %v", templateFile, err)
 	}
 
 	fh, err := os.OpenFile("env.env", os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0755)
@@ -37,7 +37,7 @@ func generateEnv(templateFile string, eData envData) error {
 func generateDockerCompose(templateFile string, cData composeData) error {
 	tpl, err := template.ParseFiles(templateFile)
 	if err != nil {
-		return fmt.Errorf("error: parsing template file: %v, err: %v", templateFile, err)
+		return fmt.Errorf("error: parsing template file, check that the templateDir flag is set to the correct path: %v, err: %v", templateFile, err)
 	}
 
 	fh, err := os.OpenFile("docker-compose.yml", os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0755)
@@ -76,7 +76,7 @@ func main() {
 
 	flags := flag.String("Flags", "-d", "flags to start nats-server with")
 
-	templateDir := flag.String("templateDir", "./", "the directory path to where the template files are located")
+	templateDir := flag.String("templateDir", "./steward/scripts/nats-server/create-docker-compose-files/", "the directory path to where the template files are located")
 
 	flag.Parse()
 

scripts/nats-server/generate-nats-conf/generate-nats-conf.sh

@@ -12,6 +12,18 @@ authorization: {
         {
     
         }
+        {
+            # central
+            nkey: FILL-IN-CENTRAL-USER-KEY-HERE
+            permissions: {
+                publish: {
+                        allow: ["FILL-IN-ORGANISATION-HERE.>","errorCentral.>","central.>"]
+                }
+            subscribe: {
+                        allow: ["FILL-IN-ORGANISATION-HERE.>","errorCentral.>","central.>"]
+                }
+            }
+        }
     ]
 }
 EOF

scripts/nats-server/wrapper-docker-compose.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# TO USE:
+# ./wrapper ./le.crt ./le.key 50222
+
+LE_CRT=$1
+LE_KEY=$2
+EXPOSED_NATS_PORT=$3
+
+if go run ./steward/scripts/nats-server/generate-nkeys/main.go; then
+    echo " * succesfully generated nkeys"
+else
+    echo " * failed to generate nkeys"
+    exit 1
+fi
+
+if go run ./steward/scripts/nats-server/create-docker-compose-files/main.go -imageAndVersion=nats-server:2.5.0 -natsConfPath=./nats.conf -leCertPath="$LE_CRT" -leKeyPath="$LE_KEY" -exposedNatsPort="$EXPOSED_NATS_PORT" -templateDir=./steward/scripts/nats-server/create-docker-compose-files/; then
+    echo " * succesfully generated docker-compose and env.env file"
+else
+    echo " * failed to generate docker-compse and env.env file"
+    exit 1
+fi
+
+if ./steward/scripts/nats-server/generate-nats-conf/generate-nats-conf.sh; then
+    echo " * succesfully generated nats.conf"
+else
+    echo " * failed to generate nats-conf"
+    exit 1
+fi