first pass. lacking documentation.

Author: cdornsife

.gitignore

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+.idea
+

README.md

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 # kubernetes-postfix-relay-host
-A SMTP relay host for transactional based emails from within a cluster. 
+A SMTP relay host for transactional based emails.
+ 
+ Alpine/docker/postfix

image/.dockerignore

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+README.md

image/Dockerfile

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+FROM alpine:3.4
+MAINTAINER Chris Dornsife <chris@applariat.com>
+
+RUN apk add --no-cache postfix rsyslog supervisor \
+    && /usr/bin/newaliases \
+    && postconf 'mynetworks = 10.0.0.0/8,127.0.0.0/8,172.17.0.0/16' \
+    && postconf 'smtp_sasl_auth_enable = yes' \
+    && postconf 'smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd' \
+    && postconf 'smtp_sasl_security_options =' \
+    && postconf 'smtputf8_enable = no' \
+    && postconf 'always_add_missing_headers = yes'
+
+COPY . /
+
+EXPOSE 25
+
+ENTRYPOINT [ "/tx-smtp.sh" ]
+

image/README.md

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+# kubernetes-postfix-relay-host Docker image
+A SMTP relay host for transactional based emails from within a cluster. 

image/etc/rsyslog.conf

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+# http://www.rsyslog.com/doc/
+
+$ModLoad immark.so         # provide --MARK-- message capability
+
+$IncludeConfig /etc/rsyslog.d/*.conf
+

image/etc/rsyslog.d/imux.conf

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+# Input modules
+module(load="imuxsock")
+input(type="imuxsock" Socket="/var/run/rsyslog/dev/log" CreatePath="on")

image/etc/rsyslog.d/maillog.conf

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+mail.*     -/var/log/maillog

image/etc/rsyslog.d/stdout.conf

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+$ModLoad omstdout.so       # provide messages to stdout
+
+*.* :omstdout:             # send everything to stdout

image/etc/supervisor.d/postfix.ini

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+[program:postfix]
+process_name	= master
+directory	= /etc/postfix
+command		= /usr/sbin/postfix -c /etc/postfix start
+startsecs	= 0
+autorestart = false

image/etc/supervisor.d/rsyslog.ini

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+[program:rsyslog]
+command=/usr/sbin/rsyslogd -n
+numprocs=1
+autostart=true
+autorestart=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0

image/tx-smtp.sh

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+#!/bin/sh
+
+RELAY=${TX_SMTP_RELAY?Missing env var TX_SMTP_RELAY}
+USERNAME=${TX_SMTP_RELAY_USERNAME?Missing env var TX_SMTP_RELAY_USERNAME}
+PASSWORD=${TX_SMTP_RELAY_PASSWORD?Missing env var TX_SMTP_RELAY_PASSWORD}
+
+
+# create sasl_passwd.db
+echo "${RELAY} ${USERNAME}:${PASSWORD}" > /etc/postfix/sasl_passwd || exit 1
+postmap /etc/postfix/sasl_passwd || exit 1
+rm /etc/postfix/sasl_passwd || exit 1
+
+# Override what you want here.
+postconf "relayhost = ${RELAY}" || exit 1
+postconf 'myhostname = tx-smtp.applariat.com' || exit 1
+
+/usr/bin/supervisord -n

kubernetes/.gitignore

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+tx-smtp-relay-password

kubernetes/README.md

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+# kubernetes-postfix-relay-host
+A SMTP relay host for transactional based emails from within a cluster. 

kubernetes/global-env-cm.yaml

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+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: global-env
+data:
+  tx-smtp-relay-host: "[smtp.sendgrid.net]:587"
+  tx-smtp-relay-username: your-sendgrid-user

kubernetes/global-env-secret.sh

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+#!/usr/bin/env bash
+
+# Put your password in a file called tx-smtp-relay-password
+echo "---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: global-env
+data:
+  tx-smtp-relay-password: `base64 tx-smtp-relay-password`
+" | kubectl create -f -

kubernetes/tx-smtp-deploy.yaml

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+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: tx-smtp
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: tx-smtp
+    spec:
+      containers:
+        - name: tx-smtp
+          image: applariat/tx-smtp
+          env:
+            - name: TX_SMTP_RELAY
+              valueFrom:
+                configMapKeyRef:
+                  name: global-env
+                  key: tx-smtp-relay-host
+            - name: TX_SMTP_RELAY_USERNAME
+              valueFrom:
+                configMapKeyRef:
+                  name: global-env
+                  key: tx-smtp-relay-username
+            - name: TX_SMTP_RELAY_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: global-env
+                  key: tx-smtp-relay-password
+          ports:
+            - containerPort: 25

kubernetes/tx-smtp-svc.yaml

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+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: tx-smtp
+spec:
+  ports:
+  - port: 25
+    targetPort: 25
+    protocol: TCP
+  selector:
+    app: tx-smtp