usage with docker-compose

[stefangweichinger]

Trying this:

# cat docker-compose.yml 
version: '3.7'

networks:
  back-tier:

services:

  postfix-exporter:
    image: chatwork/kumina-postfix-exporter:latest
    volumes:
      - /var/spool/postfix/public/showq:/var/spool/postfix/public/showq:ro
      - /var/log/mail.log:/var/log/mail.log:ro
    command:
      - '--web.listen-address=":9154"'
      - '--postfix.logfile_path="/var/log/mail.log"'
        #- '--systemd.enable'
    ports:
      - 9154:9154
    networks:
      - back-tier
        #restart: always

Getting:

# docker-compose up
[+] Running 2/2
 ⠿ Network postfix-exporter_back-tier             Created                                                                                                                                                                                 0.1s
 ⠿ Container postfix-exporter-postfix-exporter-1  Created                                                                                                                                                                                 0.1s
Attaching to postfix-exporter-postfix-exporter-1
postfix-exporter-postfix-exporter-1  | 2023/04/19 11:23:39 Reading log events from "/var/log/mail.log"
postfix-exporter-postfix-exporter-1  | 2023/04/19 11:23:39 Failed to create PostfixExporter: open "/var/log/mail.log": no such file or directory
postfix-exporter-postfix-exporter-1 exited with code 1

Tried to mount the directory /var/log also, same problem.

/var/log/mail.log exists on the host with read permissions. Help welcome ....

[maxkratz]

Not sure if this works nowadays, but on my old mail server, I've used this docker-compose.yml file to run the postfix exporter:

version: '3.2'

services:
  postfix-exporter:
    # use local Dockerfile to build image
    build: .
    # mount spool and logfiles as read only to container
    volumes:
      - /var/spool/postfix:/var/spool/postfix:ro
      - /var/log/mail.log:/var/log/mail.log:ro
    # map ports to host 
    ports:
      - 9154:9154
    restart: unless-stopped

Maybe this helps.

[stefangweichinger]

@maxkratz thanks for the speedy reply. I started from scratch and now it builds and starts up. Thanks! I now try to integrate this with the prometheus-container ... another issue.