From abd76d847a6ef8784ef76db9609205239517f200 Mon Sep 17 00:00:00 2001
From: CarlosEDP <me@carlosedp.com>
Date: Mon, 4 Feb 2019 17:24:49 -0200
Subject: [PATCH] Add SMTP relay for Gmail

---
 create_gmail_auth.sh | 10 ++++++++
 smtp_server.jsonnet  | 57 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100755 create_gmail_auth.sh
 create mode 100644 smtp_server.jsonnet

diff --git a/create_gmail_auth.sh b/create_gmail_auth.sh
new file mode 100755
index 0000000..f29ae38
--- /dev/null
+++ b/create_gmail_auth.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+echo "Please enter your Gmail account";
+read username;
+
+echo "Please enter your Gmail password";
+read -s password;
+
+echo "Creating secret"
+kubectl create secret generic smtp-account -n monitoring --from-literal=username=${username} --from-literal=password=${password}
diff --git a/smtp_server.jsonnet b/smtp_server.jsonnet
new file mode 100644
index 0000000..f0ca3de
--- /dev/null
+++ b/smtp_server.jsonnet
@@ -0,0 +1,57 @@
+local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
+
+local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') +
+           (import 'image_sources_versions.jsonnet') +
+  {
+  _config+:: {
+    namespace: 'monitoring',
+  },
+
+  smtpServer+:: {
+    deployment:
+      local deployment = k.apps.v1beta2.deployment;
+      local container = k.apps.v1beta2.deployment.mixin.spec.template.spec.containersType;
+      local containerPort = container.portsType;
+
+      local podLabels = { run: 'smtp-server' };
+
+      local smtpServer =
+        container.new('smtp-server', $._config.imageRepos.smtpServer + ':' + $._config.versions.smtpServer) +
+        container.withPorts(containerPort.newNamed('smtp', 25)) +
+        container.withEnv([
+          {
+            name: 'GMAIL_USER',
+            valueFrom: {
+              secretKeyRef: { name: 'smtp-account', key: 'username' },
+            },
+          },
+          {
+            name: 'GMAIL_PASSWORD',
+            valueFrom: {
+              secretKeyRef: { name: 'smtp-account', key: 'password' },
+            },
+          },
+          {name: 'DISABLE_IPV6',
+          value: 'True'},
+          {name: 'RELAY_DOMAINS', value: ':192.168.0.0/24:10.0.0.0/16'},
+        ]);
+
+        local c = [smtpServer];
+
+        deployment.new('smtp-server', 1, c, podLabels) +
+        deployment.mixin.metadata.withNamespace($._config.namespace) +
+        deployment.mixin.metadata.withLabels(podLabels) +
+        deployment.mixin.spec.selector.withMatchLabels(podLabels),
+
+    service:
+        local service = k.core.v1.service;
+        local servicePort = k.core.v1.service.mixin.spec.portsType;
+        local smtpServerPorts = servicePort.newNamed('smtp', 25, 'smtp');
+
+        service.new('smtp-server', $.smtpServer.deployment.spec.selector.matchLabels, smtpServerPorts) +
+        service.mixin.metadata.withNamespace($._config.namespace) +
+        service.mixin.metadata.withLabels({ 'run': 'smtp-server' })
+  },
+};
+
+{ ['smtp-server-' + name]: kp.smtpServer[name] for name in std.objectFields(kp.smtpServer) }
\ No newline at end of file