Alertmanager fails to start with error : "couldn't deduce an advertise address: no private IP found"

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Tibo

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Jan 21, 2025, 12:18:07 PM1/21/25

to Prometheus Users

Hello the community,

I'm new to the Prometheus stack and I'm trying to configure Prometheus + Alertmanager using Docker compose for a customer project.

Environment :

Docker compose

Linux ubuntu

Symptoms :

Alertmanager stops while trying to start.

Logs :

time=2025-01-21T14:07:54.309Z level=INFO source=main.go:191 msg="Starting Alertmanager" version="(version=0.28.0, branch=HEAD, revision=4ce04fb010bd626fca35928dcfe82f6f2da52ced)"

time=2025-01-21T14:07:54.310Z level=INFO source=main.go:192 msg="Build context" build_context="(go=go1.23.4, platform=linux/amd64, user=root@40be7f318ba7, date=20250115-14:22:34, tags=netgo)"

time=2025-01-21T14:07:54.323Z level=WARN source=cluster.go:178 msg="couldn't deduce an advertise address: no private IP found, explicit advertise addr not provided" component=cluster

time=2025-01-21T14:07:54.325Z level=ERROR source=main.go:259 msg="unable to initialize gossip mesh" err="create memberlist: Failed to get final advertise address: No private IP address found, and explicit IP not provided"

docker-compose-project-network.yaml :

networks:
integration-int:
driver: bridge
ipam:
config:
- subnet: 192.172.0.0/16

docker-compose-alertmanager.yaml:

services :
alert-manager:
image: "prom/alertmanager:v0.28.0"
environment:
- VIRTUAL_HOST=${ALERTMGR_VIRTUAL_HOST}
- VIRTUAL_PORT=9093
- CERT_NAME=${CERT_NAME}
ports:
- "9093:9093"
labels:
NAME: "alertmanager"
ENVIRONMENT: ${ENVIRONMENT}
volumes:
- "/var/volumes/alertmanager-config/alertmanager.yml:/etc/alertmanager/alertmanager.yml"
restart: always
networks:
- ${NETWORK}

volumes:
portainer_data:

networks:
project-integration_integration-int:
external: true apiVersion: 1

Alertmanager.yml :

global:
smtp_smarthost: 'mysmtp.com:2525'
smtp_from: 'ma...@domain.com'
smtp_require_tls: false
route:
receiver: example-email
group_by: [alertname]
receivers:
- name: example-email
email_configs:
- to: 'em...@example.com'