Add HA

Add relative path for local kube config

Add default cluster yaml config name

package/nginx-proxy/Dockerfile

@@ -0,0 +1,12 @@
+FROM nginx:1.13.6-alpine
+
+RUN apk add --update curl ca-certificates \
+    && curl -L -o /usr/bin/confd https://github.com/kelseyhightower/confd/releases/download/v0.12.0-alpha3/confd-0.12.0-alpha3-linux-amd64 \
+    && chmod +x /usr/bin/confd \
+    && mkdir -p /etc/confd
+
+ADD templates /etc/confd/templates/
+ADD conf.d /etc/confd/conf.d/
+ADD entrypoint.sh /
+
+ENTRYPOINT ["/entrypoint.sh"]

package/nginx-proxy/conf.d/nginx.toml

@@ -0,0 +1,6 @@
+[template]
+src = "nginx.tmpl"
+dest = "/etc/nginx/nginx.conf"
+keys = [
+    "CP_HOSTS",
+]

package/nginx-proxy/entrypoint.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Run confd
+confd -onetime -backend env
+
+# Start nginx
+nginx -g 'daemon off;'

package/nginx-proxy/templates/nginx.tmpl

@@ -0,0 +1,26 @@
+error_log stderr notice;
+
+worker_processes auto;
+events {
+  multi_accept on;
+  use epoll;
+  worker_connections 1024;
+}
+
+stream {
+        upstream kube_apiserver {
+            least_conn;
+            {{ $servers := split (getenv "CP_HOSTS") "," }}{{range $servers}}
+            server {{.}}:6443;
+            {{end}}
+        }
+
+        server {
+            listen        127.0.0.1:6443;
+            proxy_pass    kube_apiserver;
+            proxy_timeout 10m;
+            proxy_connect_timeout 1s;
+
+        }
+
+}