Here, we are going to concentrate on ‘/dev/sdb’, partition has been already for this disk, and the partition name is ‘/dev/sdb1’. In the above snapshot, we can see that it has listed all available disks information now and its partitions. Step2 – Let’s run the ‘fdisk’ command to list available disks as shown below: – Step 1 – Run the below command to start a container in privileged mode, just we have to use one extra flag that is the ‘–privilege’ option as shown below: –ĭocker run -it -rm -privileged ubuntu sh Let’s run a new container in privileged mode. In the above snapshot, we can see that it is not showing any disks because the container is not running in the privileged mode so it is not displaying the disk attached to it. Step 2 – Now, try to list the available disks using the ‘fdisk’ utility as shown below: – We have also used the ‘–rm’ option that will remove the container once we exit. In the above snapshot, we can see that a container has been started using the ‘ubuntu’ Docker image and connected to the container. Step 1 – Run a container without the privileged option using the command shown below: – So, let’s assume we have two disks attached to our host and we want to mount the second disk to the container to store the data produce by the application running inside a container. Let’s run a non-privileged container and a privileged container and try to mount disk inside the container to store the data. Let’s understand the working process of the privileged mode with the below examples: It actually allows access to all connected devices as well as makes some configuration changes in AppArmor or SELinux that allows the container to have almost the same access to the host as a process running outside containers on the host. How Privileged Function Works in Docker?Īs we know that the privileged mode allows access to access to all devices connected to the host as similar to the host using those devices or resources. In the above snapshot, we are just checking that the privileged option is working fine or now, this is not a real scenario where we need to run the container in privileged mode. Note: we do have other OPTIONS available in the ‘docker run’ command but we can use these options in addition to the ‘–privileged’ option. –cap-drop: We can limit additional capabilities to the container –cap-add: We can add additional capabilities to the container using this option
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