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Will this sequence of steps completely delete an image from disk in the Docker Trusted Registry?
Solution: Manually delete all layers used by the image on the disk from the Docker Trusted Registry.
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution:Use either EXPOSE or --publish to access the containers on the bridge network
The answer depends on whether you want to access the container from the host's network or from other containers on the same network. EXPOSE and --publish have different effects on the container's port visibility.Reference:Docker run reference,Dockerfile reference,Docker networking overview
One of several containers in a pod is marked as unhealthy after failing its livenessProbe many times. Is this the action taken by the orchestrator to fix the unhealthy container?
Solution: The unhealthy container is restarted.
A liveness probe is a mechanism for indicating your application's internal health to the Kubernetes control plane. Kubernetes uses liveness probes to detect issues within your pods.When a liveness check fails, Kubernetes restarts the container in an attempt to restore your service to an operational state1. Therefore, the action taken by the orchestrator to fix the unhealthy container is to restart it.Reference:
Content trust in Docker | Docker Docs
Docker Content Trust: What It Is and How It Secures Container Images
A Practical Guide to Kubernetes Liveness Probes | Airplane
Will this command display a list of volumes for a specific container?
Solution. 'docker container inspect nginx'
This command will not display a list of volumes for a specific container, as it will show detailed information on the container itself, such as its configuration, network settings, state, and log path1.To display a list of volumes for a specific container, you need to use the--formatoption with a custom template that filters the output by theMountsfield2. For example, the following command will show the source and destination of the volumes mounted in the nginx container:
docker container inspect --format=' { {range .Mounts}} { {.Source}} -> { {.Destination}} { {end}}' nginxReference:
docker container inspect | Docker Docs
How to Use Docker Inspect Command - Linux Handbook
Will this command display a list of volumes for a specific container?
Solution: 'docker container inspect nginx'
= The commanddocker container inspect nginxwill display a list of volumes for the specific container named nginx.The output of the command will include a section called ''Mounts'' that shows the source, destination, mode, type, and propagation of each volume mounted in the container1.For example, the following output shows that the container nginx has two volumes: one is a bind mount from the host's /var/log/nginx directory to the container's /var/log/nginx directory, and the other is an anonymous volume created by Docker at /var/lib/docker/volumes/... and mounted to the container's /etc/nginx/conf.d directory2.
'Mounts': [
{
'Type': 'bind',
'Source': '/var/log/nginx',
'Destination': '/var/log/nginx',
'Mode': 'rw',
'RW': true,
'Propagation': 'rprivate'
},
{
'Type': 'volume',
'Name': 'f6eb3dfdd57b7e632f6329a6d9bce75a1e8ffdf94498e5309c6c81a87832c28d',
'Source': '/var/lib/docker/volumes/f6eb3dfdd57b7e632f6329a6d9bce75a1e8ffdf94498e5309c6c81a87832c28d/_data',
'Destination': '/etc/nginx/conf.d',
'Driver': 'local',
'Mode': '',
'RW': true,
'Propagation': ''
}
]
:
docker container inspect
List volumes of Docker container
