Allow registering replica-first-boot scripts#448
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We've recently extended the Coriolis API to allow specifying *when* a given user script should be executed. We currently support the following phases: * osmorphing_pre_os_mount * osmorphing_post_os_mount For convenience, we'll also add the following phase: * replica_first_boot These scripts will be executed when the replica VM boots for the first time. We'll inject them during os-morphing. As you may have noticed, the user can already do this but it's quite inconvenient to pass a script that injects another first-boot script. We'll rely on systemd on Linux and cloudbase-init on Windows. All the Linux distributions that we support have switched to Systemd about 10 years ago. Also, as per this commit [1], we rely on the fact that cloudbase-init will be available all the time and that we can use it to run first-boot scripts. Note that we did consider using scheduled tasks on Windows (as opposed to Cloudbase-init). We'd need to use an xml task definition and register it using registry keys, however it seems like we lack the privileges to create entries such as the following: ``` $HIVE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\$TaskGUID" ``` [1] cloudbase@b5f93fd
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Client PR: cloudbase/python-coriolisclient#101 |
claudiubelu
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Jun 2, 2026
| index: int = 0, | ||
| user_provided=True, | ||
| ): | ||
| if len(script) == 0: |
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In what scenario is this true?
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The user may provide an empty script. I thought that a sanity check wouldn't hurt.
* propagate errors and avoid creating /var/lib/coriolis/firstboot-complete if any of the scripts fails * log a warning if a script isn't executable * use journal+console logging
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We've recently extended the Coriolis API to allow specifying when a given user script should be executed. We currently support the following phases:
For convenience, we'll also add the following phase:
Sample:
These scripts will be executed when the replica VM boots for the first time. We'll inject them during os-morphing. As you may have noticed, the user can already do this but it's quite inconvenient to pass a script that injects another first-boot script.
We'll rely on systemd on Linux and cloudbase-init on Windows. All the Linux distributions that we support have switched to Systemd about 10 years ago. Also, as per this commit [1], we rely on the fact that cloudbase-init will be available all the time and that we can use it to run first-boot scripts.
Note that we did consider using scheduled tasks on Windows (as opposed to Cloudbase-init). We'd need to use an xml task definition and register it using registry keys, however it seems like we lack the privileges to create entries such as the following:
[1] b5f93fd