Starting a QNX Container and checking its logs

Starting the container can be done via the qcmctl container start command:

qcmctl container start container1

And the state of the container can be confirmed with qcmctl container list as follows:

# qcmctl container list
NAME         CONTAINER ID   STATE     CREATED
container1   95c4d5955418   Running   2025-06-05 18:00:08

More details of the container (e.g., PID of the container process) can be found via the status command:

# qcmctl container status container1 
FIELD       VALUE
Name        container1
Id          95c4d59554183251af5eb21242c5e38c6493fff3013387a9f4e5f4c6fe9fd8f1
State       Running
Created     2025-06-05 18:00:08
Started     2025-06-05 19:01:47
PID         10911765

By default, if neither the log_directory on the Pod nor the log_path on the container is configured, then the STDOUT or STDERR logs may be under root_directory/containers/logs/<container-id>.

In your container example, to view the output of your container application which prints a periodic message to STDOUT, run:

# tail -f /var/lib/containers/logs/95c4d59554183251af5eb21242c5e38c6493fff3013387a9f4e5f4c6fe9fd8f1 
Hello from a QNX container!
Hello from a QNX container!
Hello from a QNX container!

Alternatively, you can use qcmctl to view the messages:

# qcmctl container logs 95c4d59554183251af5eb21242c5e38c6493fff3013387a9f4e5f4c6fe9fd8f1