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36 lines
1.5 KiB
Markdown
36 lines
1.5 KiB
Markdown
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# Upgrade you cluster
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Constellation provides an easy way to upgrade from one release to the next.
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This involves choosing a new VM image to use for all nodes in the cluster and updating the cluster's expected measurements.
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## Plan the upgrade
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If you don't already know the image you want to upgrade to, use the `upgrade plan` command to pull in a list of available updates.
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```bash
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constellation upgrade plan
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```
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The command will let you interactively choose from a list of available updates and prepare your Constellation config file for the next step.
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If you plan to use the command in scripts, use the `--file` flag to compile the available options into a YAML file.
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You can then manually set the chosen upgrade option in your Constellation config file.
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:::caution
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The `constellation upgrade plan` will only work for official Edgeless release images.
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If your cluster is using a custom image or a debug image, the Constellation CLI will fail to find compatible images.
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However, you may still use the `upgrade execute` command by manually selecting a compatible image and setting it in your config file.
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:::
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## Execute the upgrade
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Once your config file has been prepared with the new image and measurements, use the `upgrade execute` command to initiate the upgrade.
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```bash
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constellation upgrade execute
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```
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After the command has finished, the cluster will automatically replace old nodes using a rolling update strategy to ensure no downtime of the control or data plane.
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