improve IPv6 Support (#377)

* improve IPv6 Support

- add values to change listenAddresses for railsserver and websocket
- make nginx also listen on IPv6 and add values to disable IPv4/IPv6

Signed-off-by: Andreas Palm <ap@ewsp.de>

* bump version to 15.3.0

Signed-off-by: Andreas Palm <ap@ewsp.de>

* Bump Zammad version to 15.4.0

---------

Signed-off-by: Andreas Palm <ap@ewsp.de>
Co-authored-by: Andreas Palm <ap@ewsp.de>
Co-authored-by: André Bauer <monotek@users.noreply.github.com>
Co-authored-by: Martin Gruner <mg@zammad.com>

Author: 4 people

zammad/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: zammad
-version: 15.3.0
+version: 15.4.0
 appVersion: 6.5.2-22
 description: Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and e-mails.
 home: https://zammad.org

zammad/templates/configmap-nginx.yaml

@@ -23,7 +23,12 @@ data:
     }
 
     server {
+        {{- if .Values.zammadConfig.nginx.listenIpv4 }}
         listen 8080;
+        {{- end }}
+        {{- if .Values.zammadConfig.nginx.listenIpv6 }}
+        listen [::]:8080;
+        {{- end }}
 
         server_name _;
 

zammad/templates/deployment-railsserver.yaml

@@ -55,7 +55,7 @@ spec:
             - "exec"
             - "puma"
             - "-b"
-            - "tcp://[::]:3000"
+            - "tcp://{{ .Values.zammadConfig.railsserver.listenAddress }}:3000"
             - "-w"
             - "{{ .Values.zammadConfig.railsserver.webConcurrency }}"
             - "-e"

zammad/templates/deployment-websocket.yaml

@@ -45,7 +45,7 @@ spec:
             - "exec"
             - "script/websocket-server.rb"
             - "-b"
-            - "0.0.0.0"
+            - "{{ .Values.zammadConfig.websocket.listenAddress }}"
             - "-p"
             - "6042"
             - "start"

zammad/values.yaml

@@ -105,6 +105,8 @@ zammadConfig:
     # Maximum upload size
     clientMaxBodySize: 50M
     knowledgeBaseUrl: ""
+    listenIpv4: true
+    listenIpv6: true
     startupProbe:
       tcpSocket:
         port: 8080
@@ -223,6 +225,7 @@ zammadConfig:
     # can be used to add additional containers / sidecars
     sidecars: []
     trustedProxies: "['127.0.0.1', '::1']"
+    listenAddress: "[::]"
     webConcurrency: 0
     # tmpdir will be used by all Zammad/Rails containers
     tmpdir: "/opt/zammad/tmp"
@@ -375,6 +378,7 @@ zammadConfig:
           - ALL
       readOnlyRootFilesystem: true
       privileged: false
+    listenAddress: "::"
     # can be used to add additional containers / sidecars
     sidecars: []
     podLabels: {}