consul

Commit Graph

Author	SHA1	Message	Date
Derek Menteer	f3776894bf	Fix agent cache incorrectly notifying unchanged protobufs. (#15866 ) Fix agent cache incorrectly notifying unchanged protobufs. This change fixes a situation where the protobuf private fields would be read by reflect.DeepEqual() and indicate data was modified. This resulted in change notifications being fired every time, which could cause performance problems in proxycfg.	2 years ago
R.B. Boyer	3c44116a8f	cache: refactor agent cache fetching to prevent unnecessary fetches on error (#14956 ) This continues the work done in #14908 where a crude solution to prevent a goroutine leak was implemented. The former code would launch a perpetual goroutine family every iteration (+1 +1) and the fixed code simply caused a new goroutine family to first cancel the prior one to prevent the leak (-1 +1 == 0). This PR refactors this code completely to: - make it more understandable - remove the recursion-via-goroutine strangeness - prevent unnecessary RPC fetches when the prior one has errored. The core issue arose from a conflation of the entry.Fetching field to mean: - there is an RPC (blocking query) in flight right now - there is a goroutine running to manage the RPC fetch retry loop The problem is that the goroutine-leak-avoidance check would treat Fetching like (2), but within the body of a goroutine it would flip that boolean back to false before the retry sleep. This would cause a new chain of goroutines to launch which #14908 would correct crudely. The refactored code uses a plain for-loop and changes the semantics to track state for "is there a goroutine associated with this cache entry" instead of the former. We use a uint64 unique identity per goroutine instead of a boolean so that any orphaned goroutines can tell when they've been replaced when the expiry loop deletes a cache entry while the goroutine is still running and is later replaced.	2 years ago
Dan Upton	d7f8a8e4ef	proxycfg: remove dependency on `cache.UpdateEvent` (#13144 ) OSS portion of enterprise PR 1857. This removes (most) references to the `cache.UpdateEvent` type in the `proxycfg` package. As we're going to be direct usage of the agent cache with interfaces that can be satisfied by alternative server-local datasources, it doesn't make sense to depend on this type everywhere anymore (particularly on the `state.ch` channel). We also plan to extract `proxycfg` out of Consul into a shared library in the future, which would require removing this dependency. Aside from a fairly rote find-and-replace, the main change is that the `cache.Cache` and `health.Client` types now accept a callback function parameter, rather than a `chan<- cache.UpdateEvents`. This allows us to do the type conversion without running another goroutine.	3 years ago
Daniel Nephin	d9b8d30cad	cache: log a warning when Cache.Notify handles an error Without these warnings, errors are silently ignored, which can make debugging problems more challenging.	4 years ago
Matt Keeler	8837907de4	Make the Agent Cache more Context aware (#8092 ) Blocking queries issues will still be uncancellable (that cannot be helped until we get rid of net/rpc). However this makes it so that if calling getWithIndex (like during a cache Notify go routine) we can cancell the outer routine. Previously it would keep issuing more blocking queries until the result state actually changed.	5 years ago
Daniel Nephin	4ef9fc9f27	agent/cache: reduce function arguments by removing duplicates A few of the unexported functions in agent/cache took a large number of arguments. These arguments were effectively overrides for values that were provided in RequestInfo. By using a struct we can not only reduce the number of arguments, but also simplify the logic by removing the need for overrides.	5 years ago
Daniel Nephin	5fe7043439	agent/cache: Make all cache options RegisterOptions Previously the SupportsBlocking option was specified by a method on the type, and all the other options were specified from RegisterOptions. This change moves RegisterOptions to a method on the type, and moves SupportsBlocking into the options struct. Currently there are only 2 cache-types. So all cache-types can implement this method by embedding a struct with those predefined values. In the future if a cache type needs to be registered more than once with different options it can remove the embedded type and implement the method in a way that allows for paramaterization.	5 years ago
Daniel Nephin	7246d8b6cb	agent/cache: Reduce differences between notify implementations These two notify functions are very similar. There appear to be just enough differences that trying to parameterize the differences may not improve things. For now, reduce some of the cosmetic differences so that the material differences are more obvious.	5 years ago
Daniel Nephin	c9a87be6ee	agent/cache: move typeEntry lookup to the edge This change moves all the typeEntry lookups to the first step in the exported methods, and makes unexporter internals accept the typeEntry struct. This change is primarily intended to make it easier to extract the container of caches from the Cache type. It may incidentally reduce locking in fetch, but that was not a goal.	5 years ago
R.B. Boyer	9566df524e	agent: cache notifications work after error if the underlying RPC returns index=1 (#6547 ) Fixes #6521 Ensure that initial failures to fetch an agent cache entry using the notify API where the underlying RPC returns a synthetic index of 1 correctly recovers when those RPCs resume working. The bug in the Cache.notifyBlockingQuery used to incorrectly "fix" the index for the next query from 0 to 1 for all queries, when it should have not done so for queries that errored. Also fixed some things that made debugging difficult: - config entry read/list endpoints send back QueryMeta headers - xds event loops don't swallow the cache notification errors	5 years ago
Kyle Havlovitz	c269369760	Make central service config opt-in and rework the initial registration	6 years ago
R.B. Boyer	f4a3b9d518	fix typos reported by golangci-lint:misspell (#5434 )	6 years ago
Matt Keeler	7e6b3e6a0c	Implement prepared query upstreams watching for envoy (#5224 ) Fixes #4969 This implements non-blocking request polling at the cache layer which is currently only used for prepared queries. Additionally this enables the proxycfg manager to poll prepared queries for use in envoy proxy upstreams.	6 years ago
Paul Banks	c9217c958e	merge feedback: fix typos; actually use deliverLatest added previously but not plumbed in	6 years ago
Paul Banks	96b9b95a19	Add cache.Notify to abstract watching for cache updates for types that support blocking semantics. (#4695 )	6 years ago

15 Commits (GH-migration-add-oss-ent-builder-logic)