this patch adds support for tenants. This touches mostly pageserver.
Directory layout on disk is changed to contain new layer of indirection.
Now path to particular repository has the following structure: <pageserver workdir>/tenants/<tenant
id>. Tenant id has the same format as timeline id. Tenant id is included in
pageserver commands when needed. Also new commands are available in
pageserver: tenant_list, tenant_create. This is also reflected CLI.
During init default tenant is created and it's id is saved in CLI config,
so following commands can use it without extra options. Tenant id is also included in
compute postgres configuration, so it can be passed via ServerInfo to
safekeeper and in connection string to pageserver.
For more info see docs/multitenancy.md.
- The 'pageserver' fixture now sets up the repository and starts up
the Page Server automatically. In other words, the 'pageserver'
fixture provides a Page Server that's up and running and ready to
use in tests.
- The 'pageserver' fixture now also creates a branch called 'empty',
right after initializing the repository. By convention, all the
tests start by createing a new branch off 'empty' for the test. This
allows running all the tests against the same Page Server
concurrently. (I haven't tested that though. pytest doensn't
provide an option to run tests in parallel but there are extensions
for that.)
- Remove the 'zen_simple' fixture. Now that 'pageserver' provides
server that's up and running, it's pretty simple to use the
'pageserver' and 'postgres' fixtures directly.
- Don't assume host name or ports in the tests. They now use the
fields in the fixtures for that. That allows assigning the ports
dynamically, making it possible to run multiple page servers in
parallel, or running the tests in parallel with another page
server. This commit still hard codes the Page Server's port in the
fixture, though, so more work is needed to actually make it
possible.
- I made some changes to the 'postgres' fixture in commit 532918e13d,
which broke the other tests. Fix them.
- Divide the tests into two "batches" of roughly equal runtime, which
can be run in parallel
- Merge the 'test_file' and 'test_filter' options in CircleCI config
into one 'test_selection' option, for simplicity.
