docs: Proposal for blue-green deployment #34
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Signed-off-by: John Gomersall <[email protected]>
alexgarel
reviewed
Sep 2, 2024
| volumes: | ||
| - dbdata_v2:/var/data | ||
| ``` | ||
| Note that the dbdata_v2 volume name is retained. Running `docker compose up --remove-orphans` in this case would remove the `example_next` container and replace the old `example` container with the new version. |
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In production we use external volumes for volumes that contains data (this is important to be able to do docker compose down -v without loosing actual data, but also because loosing automatically created volumes is far too easy).
So you must add:
- modification of external volume name in Makefile
- creation of the new external volume
and after migration: - removal of old external volume.
alexgarel
reviewed
Sep 2, 2024
| - dbdata:/var/data | ||
| ``` | ||
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| The first step in deploying a new version would be to add a new service and volume and update the old service to use the last build image, e.g. |
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You don't explicitly tell how you intend those changes to be done.
Personally, for this kind of migration, it seems ok to me to do them directly editing files in production. This avoids a lot of latency and even eventual pitfalls due to CI.
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Signed-off-by: John Gomersall [email protected]
What