ClusterManager: Implements support of remote clusters.

After this change users will be able to:
* Create cluster and add/remove servers to it
* Install apps on remote cluster
* Move already installed apps between clusters
* Apps running on server being removed will auto-migrate
  to another server from that same cluster

This is achieved by:
* Installing and running minimal version of dodo on remote cluster
* Ingress-nginx is installed automatically on new clusters
* Next to nginx we run VPN client in the same pod, so that
  default cluster can establish secure communication with it
* Multiple reverse proxies are configured to get to the
  remote cluster service from ingress installed on default cluster.

Next steps:
* Support remote clusters in dodo apps (prototype ready)
* Clean up old cluster when moving app to the new one. Currently
  old cluster keeps running app pods even though no ingress can
  reach it anymore.

Change-Id: Iffc908c93416d4126a8e1c2832eae7b659cb8044
diff --git a/charts/secret/.helmignore b/charts/secret/.helmignore
new file mode 100644
index 0000000..0e8a0eb
--- /dev/null
+++ b/charts/secret/.helmignore
@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
diff --git a/charts/secret/Chart.yaml b/charts/secret/Chart.yaml
new file mode 100644
index 0000000..eee9abd
--- /dev/null
+++ b/charts/secret/Chart.yaml
@@ -0,0 +1,6 @@
+apiVersion: v2
+name: secret
+description: A Helm chart for secret
+type: application
+version: 0.0.1
+appVersion: "0.0.1"
diff --git a/charts/secret/templates/install.yaml b/charts/secret/templates/install.yaml
new file mode 100644
index 0000000..62eb096
--- /dev/null
+++ b/charts/secret/templates/install.yaml
@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: Secret
+metadata:
+    name: {{ .Values.name }}
+    {{- if .Values.keep }}
+    helm.sh/resource-policy: keep
+    {{- end }}
+data:
+  {{ .Values.key }}: {{ .Values.value }}
diff --git a/charts/secret/values.yaml b/charts/secret/values.yaml
new file mode 100644
index 0000000..fce03b2
--- /dev/null
+++ b/charts/secret/values.yaml
@@ -0,0 +1,4 @@
+name: secret
+key: key
+value: value
+keep: false