Upgrading to Release 1.6

4 Upgrading to Release 1.6

This section describes how to upgrade Oracle Cloud Native Environment from Release 1.5 to Release 1.6.

When the Oracle Cloud Native Environment packages and the Kubernetes cluster are upgraded to Release 1.6, you can use the new features in this release.

Perform each step in this chapter in order to upgrade your environment from Release 1.5 to Release 1.6.

Important:

Before you upgrade to Release 1.6, update to the latest errata release of Oracle Cloud Native Environment Release 1.5. For information on updating the environment, see Updates and Upgrades for Release 1.5.

Changing the Software Packages Source

This section contains information on setting the location for the software packages for the operating system on which you want to upgrade the Oracle Cloud Native Environment software.

Oracle Linux 8

If the operating system on the nodes is Oracle Linux 8, update the package source using the information in this section.

If the systems are registered to use ULN, use the ULN web interface to subscribe each system to the ol8_x86_64_olcne16 channel. Make sure you unsubscribe each system from the following channels:

ol8_x86_64_olcne15
ol8_x86_64_olcne14
ol8_x86_64_olcne13
ol8_x86_64_olcne12

If you are using the Oracle Linux yum server for system updates, on each node update the oracle-olcne-release-el8 release package. Enable the ol8_olcne16 repository and disable the repositories for the previous releases. They are:

ol8_olcne15
ol8_olcne14
ol8_olcne13
ol8_olcne12

On each node, run:

sudo dnf update oracle-olcne-release-el8
sudo dnf config-manager --enable ol8_olcne16
sudo dnf config-manager --disable ol8_olcne15 ol8_olcne14 ol8_olcne13 ol8_olcne12

Oracle Linux 7

If the operating system on the nodes is Oracle Linux 7, update the package source using the information in this section.

Disable any ULN channels or Oracle Linux yum server repositories for previous releases and enable the one for Release 1.6.

If the systems are registered to use ULN, use the ULN web interface to subscribe the systems to the ol7_x86_64_olcne16 channel. Make sure you unsubscribe each system from the following channels.

ol7_x86_64_olcne15
ol7_x86_64_olcne14
ol7_x86_64_olcne13
ol7_x86_64_olcne12
ol7_x86_64_olcne11
ol7_x86_64_olcne
ol7_x86_64_developer

If you are using the Oracle Linux yum server for system updates, on each node update the oracle-olcne-release-el7 release package. Enable the ol7_olcne16 repository and disable the following repositories:

ol7_olcne15
ol7_olcne14
ol7_olcne13
ol7_olcne12
ol7_olcne11
ol7_olcne
ol7_developer

On each node, run:

sudo yum update oracle-olcne-release-el7
sudo yum-config-manager --enable ol7_olcne16
sudo yum-config-manager --disable ol7_olcne15 ol7_olcne14 ol7_olcne13 ol7_olcne12 ol7_olcne11 ol7_olcne ol7_developer

Upgrading the Operator Node

Upgrade the operator node with the new Oracle Cloud Native Environment software packages.

To upgrade the operator node on Oracle Linux 8:

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:
```
sudo dnf update olcnectl olcne-api-server olcne-utils
```

Start the olcne-api-server service:

sudo systemctl start olcne-api-server.service

To upgrade the operator node on Oracle Linux 7:

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:
```
sudo yum update olcnectl olcne-api-server olcne-utils
```

Start the olcne-api-server service:

sudo systemctl start olcne-api-server.service

Upgrading the Kubernetes Nodes

Upgrade the Kubernetes nodes with the new Oracle Cloud Native Environment software packages.

On the operator node, use the olcnectl environment update command to upgrade the Platform Agent on each node in the environment. This example upgrades the Platform Agent on all nodes in the myenvironment environment.

olcnectl environment update olcne \
--environment-name myenvironment

The Platform Agent is upgraded and the service is restarted on each node.

Upgrading the Kubernetes Cluster

Upgrade the cluster to Kubernetes Release 1.25.15.

On the operator node, use the olcnectl module update command to upgrade to the latest Kubernetes release available for Oracle Cloud Native Environment Release 1.6. This example upgrades a Kubernetes module named mycluster in the myenvironment environment to Kubernetes Release 1.25.15.

olcnectl module update \
--environment-name myenvironment \
--name mycluster \
--kube-version 1.25.15

The --kube-version option specifies the release to which you want to upgrade. This example uses release number 1.25.15.

Important:

Make sure you upgrade to the latest Kubernetes release. To get the version number of the latest Kubernetes release for Oracle Cloud Native Environment Release 1.6, see Release Notes.

When each node in the cluster is upgraded to the latest Kubernetes release, the cluster's health is validated and the upgrade completes.

Upgrading Istio

If you have the Istio module installed, you must also upgrade it.

Important:

Make sure you upgrade to the latest releases for each component in this section. To get the version numbers of the latest releases for Oracle Cloud Native Environment Release 1.6, see Release Notes.

To upgrade Istio, on the operator node, use the olcnectl module update command to upgrade to the latest Istio release available for Oracle Cloud Native Environment Release 1.6. This example upgrades 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 upgrade. This example uses release number 1.16.7.

When you upgrade to Istio Release 1.16.7, the update iterates through each Istio release up to Release 1.16.7. When each node in the cluster is upgraded to the next Istio release, the cluster's health is validated. If the cluster is healthy, the cycle of back up, upgrade to the next release, and cluster validation starts again, until all nodes are upgraded to the latest Istio release.

Upgrading the Oracle Cloud Infrastructure Cloud Controller Manager Module

If you have the Oracle Cloud Infrastructure Cloud Controller Manager module installed, you must also upgrade it.

To upgrade the Oracle Cloud Infrastructure Cloud Controller Manager module, on the operator node, use the olcnectl module update command. This example upgrades the module named myoci in the myenvironment environment to the Oracle Cloud Infrastructure Cloud Controller Manager module Release 1.25.0

olcnectl module update \
--environment-name myenvironment \
--name myoci \
--oci-ccm-version 1.25.0 \
--oci-container-registry "" \
--ccm-container-registry ""

The --oci-ccm-version option specifies the release to which you want to upgrade. This example uses release number 1.25.0.

Important:

Make sure you upgrade to the latest release of the Oracle Cloud Infrastructure Cloud Controller Manager module. To get the version numbers of the latest releases for Oracle Cloud Native Environment Release 1.6, see Release Notes.

For registry options --oci-container-registry and --ccm-container-registry, the example assumes public registries are being used, and both options are therefore set to an empty string ("") to allow the Platform API Server to automatically configure the correct public container registry from which to pull the Oracle Cloud Infrastructure Cloud Controller Manager container images. If, however, you are using private registries, and have already set values for --oci-container-registry and --ccm-container-registry during the installation process, then you do not have to specify these options.