[filelogreceiver] container operator with custom filename

[blezoray]

Hello,

On a Rancher cluster, I have container logs in /var/log/containers, with the filename format: <pod_name><deployment/statefulset/daemonset>-.log
/var/log/containers/otelcol-collector-rkfc4_default_otc-container-e8f18d5c71b10319fefc7d897c922a0cdd19cd274ea18d936ab1b29558f3c458.log

So, I try to use this configuration:

    receivers:  
      filelog/containerd:
        exclude: []
        include:
        - /var/log/containers/*.log
        include_file_name: true
        include_file_path: false
        operators:
        - max_log_size: 102400
          type: container
          #format: containerd
        retry_on_failure:
          enabled: true
        start_at: end

But it generates this error:

2025-07-11T12:28:43.590Z	error	reader/reader.go:243	failed to emit token	{"resource": {"service.instance.id": "1c520899-50ce-4582-b5dc-4b60fa97bc58", "service.name": "orange-opentelemetry-collector", "service.version": "0.129.0"}, "otelcol.component.id": "filelog/containerd", "otelcol.component.kind": "receiver", "otelcol.signal": "logs", "component": "fileconsumer", "path": "/var/log/containers/otelcol-collector-rkfc4_default_otc-container-e8f18d5c71b10319fefc7d897c922a0cdd19cd274ea18d936ab1b29558f3c458.log", "error": "consume entries: failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field; failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field; failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field; failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field; failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field; failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field; failed to handle attribute mappings: type '<nil>' cannot be parsed as log path field"}
github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/internal/reader.(*Reader).readContents
	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza@v0.129.0/fileconsumer/internal/reader/reader.go:243
github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer/internal/reader.(*Reader).ReadToEnd
	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza@v0.129.0/fileconsumer/internal/reader/reader.go:120
github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/fileconsumer.(*Manager).consume.func1
	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza@v0.129.0/fileconsumer/file.go:169

Do you any suggestion to configure the filelog receiver in order to manage this filename ?

Rgds.

[blezoray]

Sorry, it's a wrong issue.
Log files in /var/log/containers are symbolic link to /var/log/pods/ log files.

# cd /var/log/containers
/var/log/containers # ls -al
total 64
drwxr-xr-x    2 root     root          4096 Jul 11 14:50 .
drwxrwxr-x   13 root     112           4096 Jul  4 09:12 ..
lrwxrwxrwx    1 root     root           100 Jul  4 09:13 calico-node-zs57v_calico-system_calico-node-d2c033d36eec3619e57f2e33fc220230a2f2f0f181f6bfdd76df06041abe14eb.log -> /var/log/pods/calico-system_calico-node-zs57v_88b02825-70d0-4488-9fc1-31ab5fa843e9/calico-node/0.log
lrwxrwxrwx    1 root     root           103 Jul  4 09:11 calico-node-zs57v_calico-system_flexvol-driver-11d9848602e76c4e2a8952f64d257715d7b431714d53aa22fd361d7ed9462282.log -> /var/log/pods/calico-system_calico-node-zs57v_88b02825-70d0-4488-9fc1-31ab5fa843e9/flexvol-driver/0.log
lrwxrwxrwx    1 root     root           100 Jul  4 09:12 calico-node-zs57v_calico-system_install-cni-535f2c77ac9015471ec56ec2054a2da9dd592ab10c9a4b9d28b73d6733d83a36.log -> /var/log/pods/calico-system_calico-node-zs57v_88b02825-70d0-4488-9fc1-31ab5fa843e9/install-cni/0.log
lrwxrwxrwx    1 root     root           125 Jul 11 08:42 cattle-cluster-agent-596899f765-gkct6_cattle-system_cluster-register-0861311da6cc50ff79150f8b5382fe75998d5eefd5041b4902f779c1b237aff6.log -> /var/log/pods/cattle-system_cattle-cluster-agent-596899f765-gkct6_05af47cb-ddd6-485a-9aa4-eb08c9b80f55/cluster-register/0.log