3 Updating to an Errata Release
This section describes how to update Oracle Cloud Native Environment to an errata release. You can use this procedure to update Kubernetes to the latest errata release. This updates the environment within the same major.minor release. For example, Release 1.6 is updated to the latest available software.
Perform each step in this chapter in order to update your environment to an errata release.
Important:
Do not change the ULN channel or Oracle Linux yum server repository. They should remain as you set them during the installation.
Updating the Operator Node
Update the operator node with the new Oracle Cloud Native Environment software packages.
To update the operator node:
-
On the operator node, stop the
olcne-api-server
service:sudo systemctl stop olcne-api-server.service
-
Update the Platform CLI, Platform API Server, and utilities packages.
On Oracle Linux 8 enter:
sudo dnf upgrade olcnectl olcne-api-server olcne-utils
On Oracle Linux 7 enter:
sudo yum update olcnectl olcne-api-server olcne-utils
-
Start the
olcne-api-server
service:sudo systemctl start olcne-api-server.service
Updating the Kubernetes Nodes
Update the Kubernetes nodes with the new Oracle Cloud Native Environment packages.
On the operator node, use the olcnectl environment update
command to update
the Platform Agent on each Kubernetes node in the environment. This example updates the
Platform Agent on all nodes in the myenvironment
environment.
olcnectl environment update olcne \ --environment-name myenvironment
The Platform Agent is updated and the service is restarted on each node.
Updating the Kubernetes Cluster
Update the cluster to the latest Kubernetes errata release.
On the operator node, use the olcnectl module update
command to update
to the latest Kubernetes errata release. This example updates a Kubernetes module
named mycluster
in the myenvironment
environment to the
latest Kubernetes errata release.
olcnectl module update \ --environment-name myenvironment \ --name mycluster
If you are using the NGINX load balancer deployed by the Platform CLI, you should
also update NGINX on the control plane nodes. You specify the location from which to pull the
NGINX container image used to update NGINX using the --nginx-image
option.
For example, include this additional line in the olcnectl module update
command to update NGINX from the Oracle Container Registry:
--nginx-image container-registry.oracle.com/olcne/nginx:1.17.7
Important:
Make sure you update to the latest NGINX release for your Oracle Cloud Native Environment release. To get the version number of the latest NGINX container image, see Release Notes.
The nodes in the cluster are updated to the latest errata release and the cluster's health is validated.
Updating Istio
If you have the Istio module installed, you must also update it.
Note:
Make sure you update to the latest release of Istio. To get the version number of the latest Istio release for Oracle Cloud Native Environment Release 1.6 see Release Notes.
To update Istio:
On the operator node, use the olcnectl module update
command to update
to the latest Istio release available for Oracle Cloud Native Environment Release 1.6. This example updates an
Istio module named myistio
in the myenvironment
environment to Istio Release 1.16.7.
olcnectl module update \
--environment-name myenvironment \
--name myistio \
--istio-version 1.16.7
The --istio-version
option specifies the release to which you want
to update. This example uses release number 1.16.7.
When you update Istio, the update iterates through each Istio release up to Release 1.16.7. When each node in the cluster is updated to the next Istio release, the cluster's health is validated. If the cluster is healthy, the cycle of back up, update to the next release, and cluster validation starts again, until all nodes are updated to the latest Istio release.