Summary:
Ref T11044. I'm going to hold this until after the release cut, but I think it's good to go.
This allows installs to configure multiple masters in `cluster.databases` and partition applications across them (for example, put Maniphest on a dedicated database).
When we make a Maniphest connection we go look up which master we should be hitting first, then connect to it.
This has at least approximately been planned for many years, so the actual change is largely just making sure that your config makes sense.
Test Plan:
- Configured `db001.epriestley.com` and `db002.epriestley.com` as master/master.
- Partitioned applications between them.
- Interacted with various applications, saw writes go to the correct host.
- Viewed "Database Servers" and saw partitioning information.
- Ran schema upgrades.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11044
Differential Revision: https://secure.phabricator.com/D16876
Summary: Creates a background that renders inside the Quicksand frame, through sorcery.
Test Plan: Turn on Quicksand, visit lots of pages. See correct background colors. This probably blows something up I'm not testing.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D16642
Summary: Ref T11132, significantly cleans up the Config app, new layout, icons, spacing, etc. Some minor todos around re-designing "issues", mobile support, and maybe another pass at actual Group pages.
Test Plan: Visit and test every page in the config app, set new items, resolve setup issues, etc.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam, Korvin
Maniphest Tasks: T11132
Differential Revision: https://secure.phabricator.com/D16468
Summary: Switches over to new property UI boxes, splits core and apps into separate pages. Move Versions into "All Settings". I think there is some docs I likely need to update here as well.
Test Plan: Click on each item in the sidebar, see new headers.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D16429
Summary:
Fixes T10697. This finishes bringing the rest of the config up to cluster power levels.
Phabricator is now given an arbitrarily long list of notification servers.
Each Aphlict server is given an arbitrarily long list of ports to run services on.
Users are free to make them meet in the middle by proxying whatever they want to whatever else they want.
This should also accommodate clustering fairly easily in the future.
Also rewrote the status UI and changed a million other things. 🐗
Test Plan:
{F1217864}
{F1217865}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10697
Differential Revision: https://secure.phabricator.com/D15703
Summary:
Ref T4292. This adds some very basic cluster/device data to the new management view. Nothing interesting yet.
Also deal with disabled bindings a little more cleanly.
Test Plan: {F1214619}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4292
Differential Revision: https://secure.phabricator.com/D15685
Summary:
Ref T4571. Write more of the missing documentation sections and clarify a few things.
Since the "replicating master" check needs a special permission, imposes a performance penalty, is probably very difficult to misconfigure, and likely not a big deal anyway, just drop the idea of trying to automatically detect + prevent it. We still show if it's an issue on the status page, provided we have permission to check.
When you don't have any cluster databases configured, never stop trying to connect to the default master database. We might want to do this eventually as load reduction, but just don't muddy the waters too much for now while things stabilize.
Test Plan:
- Tested functionality in cluster, non-cluster, and degraded-cluster modes.
- Used status console to monitor a health check cycle.
- Read docs.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4571
Differential Revision: https://secure.phabricator.com/D15679
Summary:
Ref T4571. When a database goes down briefly, we fall back to replicas.
However, this fallback is slow (not good for users) and keeps sending a lot of traffic to the master (might be bad if the root cause is load-related).
Keep track of recent connections and fully degrade into "severed" mode if we see a sequence of failures over a reasonable period of time. In this mode, we send much less traffic to the master (faster for users; less load for the database).
We do send a little bit of traffic still, and if the master recovers we'll recover back into normal mode seeing several connections in a row succeed.
This is similar to what most load balancers do when pulling web servers in and out of pools.
For now, the specific numbers are:
- We do at most one health check every 3 seconds.
- If 5 checks in a row fail or succeed, we sever or un-sever the database (so it takes about 15 seconds to switch modes).
- If the database is currently marked unhealthy, we reduce timeouts and retries when connecting to it.
Test Plan:
- Configured a bad `master`.
- Browsed around for a bit, initially saw "unrechable master" errors.
- After about 15 seconds, saw "major interruption" errors instead.
- Fixed the config for `master`.
- Browsed around for a while longer.
- After about 15 seconds, things recovered.
- Used "Cluster Databases" console to keep an eye on health checks: it now shows how many recent health checks were good:
{F1213397}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4571
Differential Revision: https://secure.phabricator.com/D15677
Summary: Ref T4571. The configuration option still doesn't do anything, but add a status panel for basic setup monitoring.
Test Plan:
Here's what a good version looks like:
{F1212291}
Also faked most of the errors it can detect and got helpful diagnostic messages like this:
{F1212292}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4571
Differential Revision: https://secure.phabricator.com/D15667
