overleaf/services/history-v1
Eric Mc Sween ddf14b0cdd Merge pull request #11355 from overleaf/em-delete-project-no-chunks
Fix crash when there are no chunks to delete

GitOrigin-RevId: 3cdb77da16fe2922888e40e469740579bc4a9b8b
2023-01-20 14:13:56 +00:00
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api Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
benchmarks Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
config Merge pull request #11346 from overleaf/msm-config-history-v1-sp 2023-01-20 14:13:46 +00:00
migrations Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
storage Merge pull request #11355 from overleaf/em-delete-project-no-chunks 2023-01-20 14:13:56 +00:00
test Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
.gitignore Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
.mocharc.json Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
.nvmrc Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
app.js Merge pull request #11300 from overleaf/msm-ce-fph 2023-01-18 15:09:44 +00:00
buildscript.txt Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
cloud-formation.json Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
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Dockerfile Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
knexfile.js Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
Makefile Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
nodemon.json Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00
package.json Merge pull request #11170 from overleaf/em-upgrade-mocha 2023-01-17 09:06:28 +00:00
README.md Avoid duplicating a math-closing dollar sign (#11227) 2023-01-16 08:41:42 +00:00

Database migrations

The history service uses knex to manage PostgreSQL migrations.

To create a new migrations, run:

npx knex migrate:make migration_name

To apply migrations, run:

npx knex migrate:latest

For more information, consult the knex migrations guide.

Global blobs

Global blobs are blobs that are shared between projects. The list of global blobs is stored in the projectHistoryGlobalBlobs Mongo collection and is read when the service starts. Changing the list of global blobs needs to be done carefully.

Adding a blob to the global blobs list

If we identify a blob that appears in many projects, we might want to move that blob to the global blobs list.

  1. Add a record for the blob to the projectHistoryGlobalBlobs collection.
  2. Restart the history service.
  3. Delete any corresponding project blobs.

Removing a blob from the global blobs list

Removing a blob from the global blobs list is trickier. As soon as the global blob is made unavailable, every project that needs the blob will have to get its own copy. To avoid disruptions, follow these steps:

  1. In the projectHistoryGlobalBlobs collection, set the demoted property to false on the global blob to remove. This will make the history system write new instances of this blob to project blobs, but still read from the global blob.

  2. Restart the history service.

  3. Copy the blob to all projects that need it.

  4. Remove the blob from the projectHistoryGlobalBlobs collection.

  5. Restart the history service.