docs: add documentation for prebuild scheduling feature #18462
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dannykopping
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docs/admin/templates/extending-templates/prebuilt-workspaces.md
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Co-authored-by: Danny Kopping <danny@coder.com>
Co-authored-by: Danny Kopping <danny@coder.com>
Co-authored-by: Danny Kopping <danny@coder.com>
Co-authored-by: Atif Ali <atif@coder.com>
Co-authored-by: Atif Ali <atif@coder.com>
ssncferreira
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Jun 20, 2025
| instances = 0 # default to 0 instances | ||
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| scheduling { | ||
| timezone = "UTC" # only a single timezone may be used for simplicity |
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nit: add the list of supported timezones
| **How scheduling works:** | ||
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| 1. The reconciliation loop evaluates all active schedules every reconciliation interval (`CODER_WORKSPACE_PREBUILDS_RECONCILIATION_INTERVAL`). | ||
| 2. The schedule that matches the current time becomes active. Overlapping schedules are disallowed by validation rules. |
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small nit:
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| 2. The schedule that matches the current time becomes active. Overlapping schedules are disallowed by validation rules. | |
| 2. The schedule matching the current time is considered active. Overlapping schedules are prevented by validation rules. |
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| 1. The reconciliation loop evaluates all active schedules every reconciliation interval (`CODER_WORKSPACE_PREBUILDS_RECONCILIATION_INTERVAL`). | ||
| 2. The schedule that matches the current time becomes active. Overlapping schedules are disallowed by validation rules. | ||
| 3. If no schedules match the current time, the base `instances` count is used. |
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small nit:
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| 3. If no schedules match the current time, the base `instances` count is used. | |
| 3. If no schedule matches the current time, the system defaults to the base `instances` count. |
| Cron expressions follow the format: `* HOUR DOM MONTH DAY-OF-WEEK` | ||
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| - `*` (minute): Must always be `*` to ensure the schedule covers entire hours rather than specific minute intervals | ||
| - `HOUR`: 0-23, range (e.g., 8-18 for 8AM-6:59PM), or `*` |
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Maybe use the same time interval for consistency:
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| - `HOUR`: 0-23, range (e.g., 8-18 for 8AM-6:59PM), or `*` | |
| - `HOUR`: 8-18, range (e.g., 8-18 for 8AM-6:59PM), or `*` |
| instances = 10 | ||
| } | ||
| schedule { | ||
| cron = "* 19-23,0-7 * * 1,5" # Evenings and nights (7PM-11:59PM, 12AM-7:59AM, Mon-Fri) |
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Wow, it is possible to compose multiple hour intervals? Nice 🤩
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Follow-up to #18126
Changes: