On 16/11/2020 21:12, Carlos Colaço wrote:
Prometheus is using port 80 instead of 8080 when using service
discovery to get Cadvisor containers.
Config:
```
# Create a job for Docker Swarm containers.
- job_name: 'dockerswarm'
dockerswarm_sd_configs:
- host: unix:///var/run/docker.sock
role: tasks
relabel_configs:
- source_labels: [__meta_dockerswarm_service_mode]
regex: global
action: keep
- source_labels: [__meta_dockerswarm_task_desired_state]
regex: running
action: keep
- source_labels: [__meta_dockerswarm_node_hostname]
target_label: job
```
As per the documentation at
https://prometheus.io/docs/prometheus/latest/configuration/configuration/#dockerswarm_sd_config
when you use the role: tasks it will return targets using the published
ports. If there are none it will use the job's "port" value, which
defaults to 80.
Therefore it suggests that you don't have a published port for that
container.
To make it work you could publish port 8080, or you could adjust your
relabling to change the port being used (by adjusting __address__)
possibly by having a label on the task.
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