Chapter 1. Installing Red Hat build of MicroShift from an RPM package

Procedure

1. In the graphical installer under Storage Configuration, select Custom Done to open the dialog for configuring partitions and volumes.
2. Under New Red Hat Enterprise Linux 8.x Installation, select Click here to create them automatically.
3. Select the root partition, /, reduce Desired Capacity so that the VG has sufficient capacity for your PVs, and then click Update Settings.

4. Complete your installation.

   Note

   For more options on partition configuration, see the guide linked in the Additional information section for Configuring Manual Partitioning.

5. As a root user, verify the VG capacity available on your system by running the following command:

   $ sudo vgs

   Example output:

   VG   #PV #LV #SN Attr   VSize    VFree
   rhel   1   2   0 wz--n- <127.00g 54.94g

Procedure

1. As a root user, enable the Red Hat build of MicroShift repositories by running the following command:

   $ sudo subscription-manager repos \
       --enable rhocp-4.12-for-rhel-8-$(uname -i)-rpms \
       --enable fast-datapath-for-rhel-8-$(uname -i)-rpms

2. Install Red Hat build of MicroShift by running the following command:

   $ sudo dnf install -y microshift

3. Download your installation pull secret from the Red Hat Hybrid Cloud Console to a temporary folder, for example, $HOME/openshift-pull-secret. This pull secret allows you to authenticate with the container registries that serve the container images used by Red Hat build of MicroShift.

4. To copy the pull secret to the /etc/crio folder of your RHEL machine, run the following command:

   $ sudo cp $HOME/openshift-pull-secret /etc/crio/openshift-pull-secret

5. Make the root user the owner of the /etc/crio/openshift-pull-secret file by running the following command:

   $ sudo chown root:root /etc/crio/openshift-pull-secret

6. Make the /etc/crio/openshift-pull-secret file readable and writeable by the root user only by running the following command:

   $ sudo chmod 600 /etc/crio/openshift-pull-secret

7. If your RHEL machine has a firewall enabled, you must configure a few mandatory firewall rules. For firewalld, run the following commands:

   $ sudo firewall-cmd --permanent --zone=trusted --add-source=10.42.0.0/16

   $ sudo firewall-cmd --permanent --zone=trusted --add-source=169.254.169.1

   $ sudo firewall-cmd --reload

Procedure

1. As a root user, start the Red Hat build of MicroShift service by entering the following command:

   $ sudo systemctl start microshift

2. Optional: To configure your RHEL machine to start Red Hat build of MicroShift when your machine starts, enter the following command:

   $ sudo systemctl enable microshift

3. Optional: To disable Red Hat build of MicroShift from automatically starting when your machine starts, enter the following command:

   $ sudo systemctl disable microshift

   Note

   The first time that the Red Hat build of MicroShift service starts, it downloads and initializes Red Hat build of MicroShift’s container images. As a result, it can take several minutes for Red Hat build of MicroShift to start the first time that the service is deployed. Boot time is reduced for subsequent starts of the Red Hat build of MicroShift service.

Procedure

1. Enter the following command to stop the Red Hat build of MicroShift service:

   $ sudo systemctl stop microshift

2. Workloads deployed on Red Hat build of MicroShift will continue running even after the Red Hat build of MicroShift service has been stopped. Enter the following command to display running workloads:

   $ sudo crictl ps -a

3. Enter the following commands to stop the deployed workloads:

   $ sudo systemctl stop kubepods.slice