Summary: Fixes T9790. This uses a simple renderer, like the inline context renderer, that emphasizes getting a quick glance at small changes and working reasonably on mobile devices.
Test Plan:
- Set `inline` setting to `9999`.
- Created a diff.
- Saw it render reasonably in HTML mail.
- Also tested text mail to make sure I didn't break that.
{F1310137, size=full}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T9790
Differential Revision: https://secure.phabricator.com/D15901
Summary:
Ref T10923. This makes the "Clone URI" UI a little nicer:
- Show whether each URI is read-only, read-write, or external.
- Clicking the button selects the URI.
- Add a link to manage the appropriate credentials.
Test Plan: {F1308302, size=full}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10923
Differential Revision: https://secure.phabricator.com/D15891
Summary: These parameters wrongly extend List.
Test Plan:
Used createdStart field for a search - didn't get error about "should be a list".
`git grep 'extends ConduitListParameterType'`.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D15881
Summary: Ref T10923. Although I'd ideally like to get rid of this eventually, keep it around for now.
Test Plan:
- Edited value for an SVN repository.
- Observed no panel present for a Git repository.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10923
Differential Revision: https://secure.phabricator.com/D15883
Summary: Ref T10923. This cleans up the remaining "pro" mess left by the cutover.
Test Plan: Viewed, managed, edited a repository.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10923
Differential Revision: https://secure.phabricator.com/D15871
Summary: Ref T10923. This isn't complete yet, but reduces lies and increases truths.
Test Plan: Read documentation, clicked new "Documentation" nav item.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10923
Differential Revision: https://secure.phabricator.com/D15868
Summary:
Ref T10923. Some of the dialogs ("Deactivate Repository", "Test Automation", etc.) had cancel or redirect URIs which I missed originally.
Go through them and make sure they all point to the right places.
Also removed one unused controller which I missed the first time around.
Test Plan:
- Opened all these dialogs in a new tab with Command-Click.
- Clicked every "cancel" and "submit" button on all of these dialogs.
- Got consistently sent to the place I came from.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10923
Differential Revision: https://secure.phabricator.com/D15867
Summary:
Ref T10694. Ref T9790. When generating inline diff context, highlight it and then mangle the highlighted output into `style="..."` so it works in HTML.
Also try to tighten up some spacing/formatting stuff.
Test Plan:
Got some output in this vein:
{F1259937}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T9790, T10694
Differential Revision: https://secure.phabricator.com/D15852
Summary:
Ref T10694. This is still missing some pieces, but seems to get most of the data into the mail in a plausible format:
- When an inline remarks on code, show the patch inline in the mail body.
- When an inline replies to another inline, show that other inline in the mail body.
- Apply remarkup rendering to inline content.
- Apply basic styling to mail body blocks.
Not covered yet:
- Syntax highlighting.
- Diff highlighting.
- Maybe clearer style/layout hints to connect comments to what they reply to? Current approach might get messy with inlines that have blockquotes and code blocks inside them, for example.
- I probably want to cap the amount of diff context we ever show to ~7 lines, even if you drag over 200 lines of code.
- CSS is a generally a bit rough still.
- The `unified-comment-context` option is effectively always on now, and should be removed.
- Text section is getting indented right now but probably shouldn't be.
- Spacing, etc., might be a bit off.
Test Plan:
Rigged Home to render these things, got a plausible-looking render (top is text, bottom is HTML):
{F1259052}
Sent myself some inline comment mail, got a plausible result.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10694
Differential Revision: https://secure.phabricator.com/D15850
Summary:
Ref T9790. This prepares the syntax color rules to be reused in mail.
This goes about halfway toward T5701 by sort-of supporting different styles but not really.
Test Plan:
- Ran `bin/celerity syntax` to regenerate syntax map.
- Viewed some highlighted code, didn't see any differences.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T9790
Differential Revision: https://secure.phabricator.com/D15846
Summary:
Ref T10748. This needs more extensive testing and is sure to have some rough edges, but seems to basically work so far.
Throwing this up so I can work through it more deliberately and make notes.
Test Plan:
- Ran migration.
- Used `bin/repository list` to list existing repositories.
- Used `bin/repository update <repository>` to update various repositories.
- Updated a migrated, hosted Git repository.
- Updated a migrated, observed Git repository.
- Converted an observed repository into a hosted repository by toggling the I/O mode of the URI.
- Conveted a hosted repository into an observed repository by toggling it back.
- Created and activated a new empty hosted Git repository.
- Created and activated an observed Git repository.
- Updated a mirrored repository.
- Cloned and pushed over HTTP.
- Tried to HTTP push a read-only repository.
- Cloned and pushed over SSH.
- Tried to SSH push a read-only repository.
- Updated several Mercurial repositories.
- Updated several Subversion repositories.
- Created and edited repositories via the API.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15842
Summary:
Ref T10748. This migrates and swaps mirroring to `PhabricatorRepositoryURI`, obsoleting `PhabricatorRepositoryMirror`.
This prevents you from editing, adding or disabling mirrors unless you know a secret URI (until the UI cuts over fully), but existing mirroring is not affected.
Test Plan:
- Added a mirroring URI to an old repository.
- Verified it worked with `bin/repository mirror`.
- Migrated forward.
- Verified it still worked with `bin/repository mirror`.
- Wow, mirroring: https://github.com/epriestley/locktopia-mirror
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15841
Summary:
Ref T10748. In D14250#158181, I accepted this conditional on removing it once Conduit could handle it.
Conduit can now handle it, or at least will be able to as soon as T10748 cuts over.
Test Plan: Grepped for `repository edit`.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15839
Summary:
Ref T10748. This has had many problems for a long time, can't create hosted repositories, can't create cluster repositories, etc. It is obsoleted by `diffusion.repository.edit`. Remove it.
(Right now `diffusion.repository.edit` isn't a strict replacement, but it will be as soon as the URI stuff cuts over.)
Test Plan: Grepped for `repository.create`.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15838
Summary:
Ref T10748. This allows an EditEngine form to be broken up into pages.
This is less powerful than `PHUIPagedFormView`, because the pages are not sequential / stateful. Each form saves immediately once it's submitted, and can not take you to a new form or back/forward in a series of forms.
For example, you can't create a workflow where the user fills out 5 pages of information before we create an object, like the current repository workflow does.
However, the only place we've ever wanted to do this is repositories and it's fairly bad there, so I feel reasonably confident we aren't going to miss this in the future.
(We do "choose a type of service/repository/rule -> fill out one page of info" fairly often, but can do this without the full-power paging stuff.)
Test Plan:
- Created a repository usin the new Manage UI, filling out only a handful of fields.
- Edited a repository using the new Manage UI.
- All forms are now EditEngine forms offering paged views of the big huge underlying form:
{F1254371}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15832
Summary:
Ref T10748. Ref T10366. Allows users to set credential for new URIs.
- Ref T7221. Our handling of the "git://" protocol is currently incorrect. This protocol is not authenticated, but is considered an SSH protocol. In the new UI, it is considered an anonymous/unauthenticated protocol instead.
- Ref T10241. This fixes the `PassphraseCredentialControl` so it doesn't silently edit the value if the current value is not visible to you and/or not valid.
Test Plan:
Performed a whole lot of credential edits, removals, and adjustments. I'll give this additional vetting before cutting over to it.
{F1253207}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T7221, T10241, T10366, T10748
Differential Revision: https://secure.phabricator.com/D15829
Summary:
Ref T10748.
- Allow users to add new URIs by clicking a button instead of knowing a secret URI.
- Validate that URIs are actually valid URIs.
- Add enable/disable action and strings.
Test Plan:
- Created a new URI.
- Tried to create a nonsense URI, created a good URI.
- Enabled/disabled a URI.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15825
Summary: Ref T10748. Adds a "uris" attachment with URI information.
Test Plan: Queried URI information via Conduit, saw reasonable looking information.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15822
Summary: Ref T10748. Brings the rest of the transactions to EditEngine, supports creating via API.
Test Plan:
- Created a URI via API.
- Created a URI via web.
- Tried to apply sneaky transactions, got rejected with good error messages. <_< >_>
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15821
Summary:
Ref T10748.
- New View page for repository URIs.
- Make display and I/O behavior (observe, mirror, read, read/write) editable.
- Add a bunch of checks to prevent you from completely screwing up a repository by making it writable from a bunch of differnet sources.
Test Plan:
{F1249866}
{F1249867}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15816
Summary:
Ref T10748. Ref T10366. This adds a new EditEngine, EditController, Editor, Query, and Transaction for RepositoryURIs.
None of these really do anything helpful yet, and these URIs are still unused in the actual application.
Test Plan: {F1249794}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10366, T10748
Differential Revision: https://secure.phabricator.com/D15815
Summary: Ref T10748. This brings the "Actions" items (publish/notify + autoclose enabled) into the new UI.
Test Plan:
- Edited this stuff via EditEngine and Conduit.
- Viewed via new Manage UI.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15811
Summary: Ref T10748. Makes a "Branches" panel, enables these transactions in the EditEngine.
Test Plan:
- Edited via EditEngine + Conduit.
- Viewed via manage UI.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15809
Summary: Ref T10748. Port this, add EditEngine support, add some type validation to the transaction.
Test Plan:
- Edited via EditEngine.
- Edited via Conduit.
- Viewed via Management UI.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15808
Summary: Ref T10748. Brings this forward in the UI and EditEngine.
Test Plan:
- Edited via Conduit.
- Viewed via Manage UI.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15805
Summary: Ref T10748. Ports this UI and exposes it on the EditEngine.
Test Plan:
- Edited via EditEngine.
- Viewed new manage UI.
Reviewers: chad
Reviewed By: chad
Subscribers: hach-que
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15804
Summary:
Fixes T10778. This is a result of T10262: when we save a form configuration and adjust the policy, we try to scramble attached file secrets.
There aren't going to be any attached files, but there's also no edge table, so we fail.
We could skip this code, but we'll likely need an edge table here sooner or later so it's probably simpler in the long run to just add an empty one.
Test Plan:
- Ran `bin/storage upgrade`, got a clean bill of health.
- Saved a form configuration after making a policy edit, no more `edge` exception.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10778
Differential Revision: https://secure.phabricator.com/D15803
Summary: Ref T4292. This provides at least some sort of hint about how to set up cluster repositories.
Test Plan:
- Read documentation.
- Ran `bin/repository clusterize` to add + remove clusters.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4292
Differential Revision: https://secure.phabricator.com/D15798
Summary: Ref T10748. Brings this over and adds EditEngine support for it.
Test Plan: Viewed and edited staging area information.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15801
Summary: Ref T10748. This merges "Storage" and "Cluster" into a single UI which combines the information of both.
Test Plan: {F1246882}
Reviewers: chad
Reviewed By: chad
Subscribers: hach-que
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15800
Summary:
Ref T10860. At least in Git over SSH, we can freely echo a bunch of stuff to stderr and Git will print it to the console, so we can tell users what's going on.
This should make debugging, etc., easier. We could tone this down a little bit once things are more stable if it's a little too chatty.
Test Plan:
```
$ echo D >> record && git commit -am D && git push
[master ca5efff] D
1 file changed, 1 insertion(+)
# Push received by "local001.phacility.net", forwarding to cluster host.
# Waiting up to 120 second(s) for a cluster write lock...
# Acquired write lock immediately.
# Waiting up to 120 second(s) for a cluster read lock on "local001.phacility.net"...
# Acquired read lock immediately.
# Device "local001.phacility.net" is already a cluster leader and does not need to be synchronized.
# Ready to receive on cluster host "local001.phacility.net".
Counting objects: 3, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 256 bytes | 0 bytes/s, done.
Total 3 (delta 1), reused 0 (delta 0)
To ssh://local@localvault.phacility.com/diffusion/26/locktopia.git
8616189..ca5efff master -> master
```
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10860
Differential Revision: https://secure.phabricator.com/D15791
Summary: Ref T10860. This doesn't change anything, it just separates all this stuff out of `PhabricatorRepository` since I'm planning to add a bit more state to it and it's already pretty big and fairly separable.
Test Plan: Pulled, pushed, browsed Diffusion.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10860
Differential Revision: https://secure.phabricator.com/D15790
Summary: Ref T4292. This adds a new high-level overview panel.
Test Plan: {F1238854}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4292
Differential Revision: https://secure.phabricator.com/D15772
Summary:
Ref T10751. Add support tooling for manually prying your way out of trouble if disaster strikes.
Refine documentation, try to refer to devices as "devices" more consistently instead of sometimes calling them "nodes".
Test Plan: Promoted and demoted repository devices with `bin/repository thaw`.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10751
Differential Revision: https://secure.phabricator.com/D15768
Summary:
Ref T4292. Ref T10366. Depends on D15751. Today, generating repository commands is purely a function of the repository, so they use protocols and credentials based on the repository configuration.
For example, a repository with an SSH "remote URI" always generate SSH "remote commands".
This needs to change in the future:
- After T10366, repositories won't necessarily just have one type of remote URI. They can only have one at a time still, but the repository itself won't change based on which one is currently active.
- For T4292, I need to generate intracluster commands, regardless of repository configuration. These will have different protocols and credentials.
Prepare for these cases by separating out command construction, so they'll be able to generate commands in a more flexible way.
Test Plan:
- Added unit tests.
- Browsed diffusion.
- Ran `bin/phd debug pull` to pull a bunch of repos.
- Ran daemons.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4292, T10366
Differential Revision: https://secure.phabricator.com/D15752
Summary: Ref T10748. Ref T10366. No support for editing and no impact on the UI, but get some of the basics in place.
Test Plan: {F1223279}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10366, T10748
Differential Revision: https://secure.phabricator.com/D15742
Summary: Ref T10748. Pretty straightforward. I'd like to put a little "!" icon in the menu if there's a warning/error eventually, but can deal with that latre.
Test Plan: {F1223096}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15741
Summary:
Ref T10748. This is roughly where I'm headed, if it makes some kind of sense? The "Edit" links in sub-sections don't work yet since I haven't built the thing.
Probably depends on D15736.
Test Plan: Manually navigated to `/manage/`, clicked around.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15737
Summary: Ref T10748. Ref T10337. This technically implements this stuff, but it does not do anything useful yet. This skips all the hard stuff.
Test Plan:
- Technically used `diffusion.repository.search` to get repository information.
- Technically used `diffusion.repository.edit` to change a repository name.
- Used `editpro/` to edit a repository name.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10337, T10748
Differential Revision: https://secure.phabricator.com/D15736
Summary:
Resolves T7691. This turned out more complex than I really wanted, mainly because I needed to feed the slug information through to both the document renderer and the preview window that appears in the edit controller.
After this change, you can now create relative links in Phriction by doing `[[ ./../some/relative/path ]]`. Relative paths aren't handled anywhere else (they'll still render, but the dots are turned into a literal 'dot' as per existing behaviour).
Test Plan: Created some Phriction documents with relative links, saw them all link correctly.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin
Maniphest Tasks: T7691
Differential Revision: https://secure.phabricator.com/D15732
Summary:
Ref T10756. This:
- Fixes T7307. This UI is now admin-only.
- Makes the main "running daemons" table more useful for multi-host setups (show where daemons are running).
- Removes logs from the web UI: these are sometimes vaguely sensitive and shouldn't be visible. The UI tells you how to get them with `bin/phd log`.
- Minor modernization.
Test Plan:
- As a non-admin, viewed daemons (access error) and bulk jobs (worked great).
- Browsed bulk job pages.
- Ran a bulk job.
- Viewed daemon console.
- Viewed task detail / daemon detail / daemon list pages.
{F1220516}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T7307, T10756
Differential Revision: https://secure.phabricator.com/D15724
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 T2783. This allows this worker to run on a machine different to the one that stores the repository, by routing the execution of Git over Conduit calls.
This API method is super gross, but fixing it isn't straightforward and it runs into other complicated considerations. We can fix it later; for now, just define it as "internal" to limit how much mess this creates.
"Internal" methods do not appear on the console.
Test Plan: Ran `bin/repository reparse --change <commit> --trace` on several commits, saw daemons make a Conduit call instead of running a `git` command.
Reviewers: hach-que, chad
Reviewed By: chad
Subscribers: joshuaspence, Korvin, epriestley
Maniphest Tasks: T2783
Differential Revision: https://secure.phabricator.com/D11874
Summary:
Ref T4292. This mostly implements the locking/versioning logic for multi-master repositories. It is only active on Git SSH pathways, and doesn't actually do anything useful yet: it just does bookkeeping so far.
When we read (e.g., `git fetch`) the logic goes like this:
- Get the read lock (unique to device + repository).
- Read all the versions of the repository on every other device.
- If any node has a newer version:
- Fetch the newer version.
- Increment our version to be the same as the version we fetched.
- Release the read lock.
- Actually do the fetch.
This makes sure that any time you do a read, you always read the most recently acknowledged write. You may have to wait for an internal fetch to happen (this isn't actually implemented yet) but the operation will always work like you expect it to.
When we write (e.g., `git push`) the logic goes like this:
- Get the write lock (unique to the repository).
- Do all the read steps so we're up to date.
- Mark a write pending.
- Do the actual write.
- Bump our version and mark our write finished.
- Release the write lock.
This allows you to write to any replica. Again, you might have to wait for a fetch first, but everything will work like you expect.
There's one notable failure mode here: if the network connection between the repository node and the database fails during the write, the write lock might be released even though a write is ongoing.
The "isWriting" column protects against that, by staying locked if we lose our connection to the database. This will currently "freeze" the repository (prevent any new writes) until an administrator can sort things out, since it'd dangerous to continue doing writes (we may lose data).
(Since we won't actually acknowledge the write, I think, we could probably smooth this out a bit and make it self-healing //most// of the time: basically, have the broken node rewind itself by updating from another good node. But that's a little more complex.)
Test Plan:
- Pushed changes to a cluster-mode repository.
- Viewed web interface, saw "writing" flag and version changes.
- Pulled changes.
- Faked various failures, got sensible states.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4292
Differential Revision: https://secure.phabricator.com/D15688
Summary:
Ref T4292. This puts a very rough skeleton in place for the new "Manage Repository" UI, somewhat similar to the "Settings" UI.
Right now, it has one panel with no content, and is not reachable from the UI.
Test Plan: {F1214525}
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4292
Differential Revision: https://secure.phabricator.com/D15683
Summary: Ref T10702
Test Plan: Open a user profile, attempt to award an archived or previously awarded badge, badges dialog should provide a typeahead, and the suggestions should offer details about whether a badge is archived or already awarded.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T10702
Differential Revision: https://secure.phabricator.com/D15665
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. If we fail to connect to the master, automatically try to degrade into a temporary read-only mode ("UNREACHABLE") for the remainder of the request, if possible.
If the request was something like "load the homepage", that'll work fine. If it was something like "submit a comment", there's nothing we can do and we just have to fail.
Detecting this condition imposes a performance penalty: every request checks the connection and gives the database a long time to respond, since we don't want to drop writes unless we have to. So the degraded mode works, but it's really slow, and may perpetuate the problem if the root issue is load-related.
This lays the groundwork for improving this case by degrading futher into a "SEVERED" mode which will persist across requests. In the future, if several requests in a short period of time fail, we'll sever the database host and refuse to try to connect to it for a little while, connecting directly to replicas instead (basically, we're "health checking" the master, like a load balancer would health check a web application server). This will give us a better (much faster) degraded mode in a major service disruption, and reduce load on the master if the root cause is load-related, giving it a better chance of recovering on its own.
Test Plan:
- Disabled master in config by changing the host/username, got degraded automatically to UNREACAHBLE mode immediately.
- Faked full SEVERED mode, requests hit replicas and put me in the mode properly.
- Made stuff work, hit some good pages.
- Hit some non-cluster pages.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4571
Differential Revision: https://secure.phabricator.com/D15674
Summary: Ref T4571. If `cluster.databases` is configured but only has replicas, implicitly drop to read-only mode and send writes to a replica.
Test Plan:
- Disabled the `master`, saw Phabricator automatically degrade into read-only mode against replicas.
- (Also tested: explicit read-only mode, non-cluster mode, properly configured cluster mode).
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4571
Differential Revision: https://secure.phabricator.com/D15672
