update kubernetes manifest

README.md

@@ -3,3 +3,37 @@
 ## Description
 Fetches IMAP inboxes via fetchmail and forwards recieved mails to a list of
 recipients.
+
+# Usage
+First you will need to write configuration files for pmml and fetchmail. Feel
+free to use the supplied examples as starting point:
+- example_configs/pmmlrc
+- example_configs/fetchmailrc
+
+## Docker
+
+```
+$ docker run -v $(pwd)/example_configs/fetchmailrc:/.fetchmailrc -v $(pwd)/example_configs/pmmlrc:/.pmmlrc -it pmml:0.1.4
+```
+
+## Kubernetes
+If using kubernetes the configuration files should be injected as secret into
+the pod executing pmml.
+
+First create the secrets:
+```
+$ kubectl create secret generic pmml-pmmlrc --from-file example_configs/pmmlrc -n pmml
+$ kubectl create secret generic pmml-fetchmailrc --from-file example_configs/fetchmailrc -n pmml
+```
+
+Afterwards create the deployment:
+```
+$ kubectl -n pmml apply -f example_configs/pmml_deployment.yml
+```
+
+## Updating secrets
+After updating either of the supplied secrets you will need to restart the
+pmml pod:
+```
+$ kubectl -n pmml delete pod $(kubectl -n pmml get pods | tail -1 | awk '{print $1}')
+```

example_configs/pmml_deployment.yml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
       - name: pmml
-        image: torarg/pmml:0.1.3
+        image: torarg/pmml:0.1.5
         volumeMounts:
         - mountPath: "/.pmmlrc"
           subPath: ".pmmlrc"

pmml.py

@@ -1,15 +1,13 @@
 #!/usr/bin/env python3
 import click
 import sys
-import os
-import email
 import email.parser
 import smtplib
 import json
 from pathlib import Path
 
 
-DEFAULT_CONFIG_FILE_PATH=Path.home() / ".pmmlrc"
+DEFAULT_CONFIG_FILE_PATH = Path.home() / ".pmmlrc"
 
 
 def read_config_file(config_file_path):
@@ -17,6 +15,7 @@ def read_config_file(config_file_path):
         config = json.load(f)
     return config
 
+
 def setup_smtp_session(smtp_server, smtp_port, smtp_user, smtp_pass):
     smtp_client = smtplib.SMTP(host=smtp_server, port=smtp_port)
     smtp_client.ehlo()
@@ -24,17 +23,30 @@ def setup_smtp_session(smtp_server, smtp_port, smtp_user, smtp_pass):
     smtp_client.login(smtp_user, smtp_pass)
     return smtp_client
 
+
 @click.command()
 @click.option("-f", "--config-file", default=DEFAULT_CONFIG_FILE_PATH)
 @click.argument("mailing-list-address")
 def cli(config_file, mailing_list_address):
+    ignore_subjects = ("Undelivered Mail Returned to Sender",)
     input = sys.stdin
     config = read_config_file(config_file)[mailing_list_address]
     msg = email.parser.Parser().parse(input)
-    smtp_client = setup_smtp_session(config['smtp_server'], config['smtp_port'],
-                                     config['smtp_user'], config['smtp_pass'])
-    smtp_client.sendmail(mailing_list_address, config['recipients'], msg.as_string())
-    smtp_client.quit()
 
-if __name__ == '__main__':
+    if msg["Subject"] in ignore_subjects:
+        print(f"Skipping processing because auf subject: {msg['Subject']}")
+    else:
+        smtp_client = setup_smtp_session(
+            config["smtp_server"],
+            config["smtp_port"],
+            config["smtp_user"],
+            config["smtp_pass"],
+        )
+        smtp_client.sendmail(
+            mailing_list_address, config["recipients"], msg.as_string()
+        )
+        smtp_client.quit()
+
+
+if __name__ == "__main__":
     cli()