The 'zenith' CLI utility can now be used to launch safekeepers. By
default, one safekeeper is configured. There are new 'safekeeper
start/stop' subcommands to manage the safekeepers. Each safekeeper is
given a name that can be used to identify the safekeeper to start/stop
with the 'zenith start/stop' commands. The safekeeper data is stored
in '.zenith/safekeepers/<name>'.
The 'zenith start' command now starts the pageserver and also all
safekeepers. 'zenith stop' stops pageserver, all safekeepers, and all
postgres nodes.
Introduce new 'zenith pageserver start/stop' subcommands for
starting/stopping just the page server.
The biggest change here is to the 'zenith init' command. This adds a
new 'zenith init --config=<path to toml file>' option. It takes a toml
config file that describes the environment. In the config file, you
can specify options for the pageserver, like the pg and http ports,
and authentication. For each safekeeper, you can define a name and the
pg and http ports. If you don't use the --config option, you get a
default configuration with a pageserver and one safekeeper. Note that
that's different from the previous default of no safekeepers. Any
fields that are omitted in the configuration file are filled with
defaults. You can also specify the initial tenant ID in the config
file. A couple of sample config files are added in the control_plane/
directory.
The --pageserver-pg-port, --pageserver-http-port, and
--pageserver-auth options to 'zenith init' are removed. Use a config
file instead.
Finally, change the python test fixtures to use the new 'zenith'
commands and the config file to describe the environment.
* We actually need Python 3.7 because of dataclasses
* Rerun 'pipenv lock' under Python 3.7 and add 'pipenv' to dev deps
* Update docs on developing for Python 3.7
* CircleCI: use Python 3.7 via Docker image instead of Orb
Once upon a time, 'page_cache.rs' contained an actual page cache, but
it hasn't for a very long time. Rename to reflect what it actually does
these days.
- Move source tree overview into separate docs/sourcetree.md and update it.
- Add glossary: docs/glossary.md
- Add a draft of Architecture overview to main Readme.md
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.
Add build dependencies and other local packages needed (Ubuntu only).
Fix some weird formatting of psql commands due to `sh` syntax
highlighting.
Improve test directions, so pytest doesn't scan the whole tree.
Drop description of the integration_tests directory since it's on its
way out.
* Add ancestor_id to pg_list->branch_list output of pageserver.
* Display branching point (LSN) for each non-root branch.
* Add tests for `zenith branch`.
Currently, the tests don't work in parallel. The tests try to create a
data directory in the same path and clash with each other. That should be
fixed, but for now, let's at least fix the instructions on how it works
now.
