Fix issue with streaming service health watches.
This commit fixes an issue where the health streams were unaware of service
export changes. Whenever an exported-services config entry is modified, it is
effectively an ACL change.
The bug would be triggered by the following situation:
- no services are exported
- an upstream watch to service X is spawned
- the streaming backend filters out data for service X (due to lack of exports)
- service X is finally exported
In the situation above, the streaming backend does not trigger a refresh of its
data. This means that any events that were supposed to have been received prior
to the export are NOT backfilled, and the watches never see service X spawning.
We currently have decided to not trigger a stream refresh in this situation due
to the potential for a thundering herd effect (touching exports would cause a
re-fetch of all watches for that partition, potentially). Therefore, a local
blocking-query approach was added by this commit for agentless.
It's also worth noting that the streaming subscription is currently bypassed
most of the time with agentful, because proxycfg has a `req.Source.Node != ""`
which prevents the `streamingEnabled` check from passing. This means that while
agents should technically have this same issue, they don't experience it with
mesh health watches.
Note that this is a temporary fix that solves the issue for proxycfg, but not
service-discovery use cases.
* add enterprise notes for IP-based rate limits
* Apply suggestions from code review
Co-authored-by: Tu Nguyen <im2nguyen@users.noreply.github.com>
Co-authored-by: David Yu <dyu@hashicorp.com>
* added bolded 'Enterprise' in list items.
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Co-authored-by: Tu Nguyen <im2nguyen@users.noreply.github.com>
Co-authored-by: David Yu <dyu@hashicorp.com>
* agent: remove agent cache dependency from service mesh leaf certificate management
This extracts the leaf cert management from within the agent cache.
This code was produced by the following process:
1. All tests in agent/cache, agent/cache-types, agent/auto-config,
agent/consul/servercert were run at each stage.
- The tests in agent matching .*Leaf were run at each stage.
- The tests in agent/leafcert were run at each stage after they
existed.
2. The former leaf cert Fetch implementation was extracted into a new
package behind a "fake RPC" endpoint to make it look almost like all
other cache type internals.
3. The old cache type was shimmed to use the fake RPC endpoint and
generally cleaned up.
4. I selectively duplicated all of Get/Notify/NotifyCallback/Prepopulate
from the agent/cache.Cache implementation over into the new package.
This was renamed as leafcert.Manager.
- Code that was irrelevant to the leaf cert type was deleted
(inlining blocking=true, refresh=false)
5. Everything that used the leaf cert cache type (including proxycfg
stuff) was shifted to use the leafcert.Manager instead.
6. agent/cache-types tests were moved and gently replumbed to execute
as-is against a leafcert.Manager.
7. Inspired by some of the locking changes from derek's branch I split
the fat lock into N+1 locks.
8. The waiter chan struct{} was eventually replaced with a
singleflight.Group around cache updates, which was likely the biggest
net structural change.
9. The awkward two layers or logic produced as a byproduct of marrying
the agent cache management code with the leaf cert type code was
slowly coalesced and flattened to remove confusion.
10. The .*Leaf tests from the agent package were copied and made to work
directly against a leafcert.Manager to increase direct coverage.
I have done a best effort attempt to port the previous leaf-cert cache
type's tests over in spirit, as well as to take the e2e-ish tests in the
agent package with Leaf in the test name and copy those into the
agent/leafcert package to get more direct coverage, rather than coverage
tangled up in the agent logic.
There is no net-new test coverage, just coverage that was pushed around
from elsewhere.
This includes prioritize by localities on disco chain targets rather than
resolvers, allowing different targets within the same partition to have
different policies.
* additional feedback
* Update website/content/docs/api-gateway/upgrades.mdx
Co-authored-by: Jeff Apple <79924108+Jeff-Apple@users.noreply.github.com>
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Co-authored-by: Jeff Apple <79924108+Jeff-Apple@users.noreply.github.com>
* trimmed CRD step and reqs from installation
* updated tech specs
* Apply suggestions from code review
Co-authored-by: Jeff Boruszak <104028618+boruszak@users.noreply.github.com>
Co-authored-by: Jeff Apple <79924108+Jeff-Apple@users.noreply.github.com>
* added upgrade instruction
* removed tcp port req
* described downtime and DT-less upgrades
* applied additional review feedback
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Co-authored-by: Jeff Boruszak <104028618+boruszak@users.noreply.github.com>
Co-authored-by: Jeff Apple <79924108+Jeff-Apple@users.noreply.github.com>
* Add header filter to api-gateway xDS golden test
* Stop adding all header filters to virtual host when generating xDS for api-gateway
* Regenerate xDS golden file for api-gateway w/ header filter
* porting over changes from enterprise repo to oss
* applied feedback on service mesh for k8s overview
* fixed typo
* removed ent-only build script file
* Apply suggestions from code review
Co-authored-by: Jeff Boruszak <104028618+boruszak@users.noreply.github.com>
* Apply suggestions from code review
Co-authored-by: David Yu <dyu@hashicorp.com>
Co-authored-by: Jeff Boruszak <104028618+boruszak@users.noreply.github.com>
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Co-authored-by: Jeff Boruszak <104028618+boruszak@users.noreply.github.com>
Co-authored-by: David Yu <dyu@hashicorp.com>
Derek Menteer
John Murret
trujillo-adam
Luke Kysow
Ashesh Vidyut
Eric Haberkorn
David Yu
Jeff Boruszak
chappie
dependabot[bot]
Chris Thain
Paul Glass
Tobias Birkefeld
Dan Stough
Curt Bushko
R.B. Boyer
Tu Nguyen
Joshua Timmons
Thomas Eckert
Hariram Sankaran
Michael Zalimeni
Poonam Jadhav
Nathan Coleman
Matt Keeler
Bryce Kalow