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45 lines
1.9 KiB
Markdown
45 lines
1.9 KiB
Markdown
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# Upgrade your cluster
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Constellation provides an easy way to upgrade to the next release.
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This involves updating the CLI, choosing a new VM image to use for all nodes in the cluster, and updating the cluster's expected measurements.
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## Update the CLI
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New features and bug fixes are added to the CLI with every release. To use them, update the CLI to the latest version by following the instructions in the [installation guide](../getting-started/install.md).
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## Migrate the configuration
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The Constellation configuration file is located in the file `constellation-conf.yaml` in your workspace.
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Refer to the [migration reference](../reference/config-migration.md) to check if you need to update fields in your configuration file.
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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 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 lets you interactively choose from a list of available updates and prepares your Constellation config file for the next step.
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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 set the chosen upgrade option in your Constellation config file.
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:::caution
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`constellation upgrade plan` only works for official Edgeless release images.
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If your cluster is using a custom 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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