* Fix xDS deadlock due to syncLoop termination.
This fixes an issue where agentless xDS streams can deadlock permanently until
a server is restarted. When this issue occurs, no new proxies are able to
successfully connect to the server.
Effectively, the trigger for this deadlock stems from the following return
statement:
https://github.com/hashicorp/consul/blob/v1.18.0/agent/proxycfg-sources/catalog/config_source.go#L199-L202
When this happens, the entire `syncLoop()` terminates and stops consuming from
the following channel:
https://github.com/hashicorp/consul/blob/v1.18.0/agent/proxycfg-sources/catalog/config_source.go#L182-L192
Which results in the `ConfigSource.cleanup()` function never receiving a
response and holding a mutex indefinitely:
https://github.com/hashicorp/consul/blob/v1.18.0/agent/proxycfg-sources/catalog/config_source.go#L241-L247
Because this mutex is shared, it effectively deadlocks the server's ability to
process new xDS streams.
----
The fix to this issue involves removing the `chan chan struct{}` used like an
RPC-over-channels pattern and replacing it with two distinct channels:
+ `stopSyncLoopCh` - indicates that the `syncLoop()` should terminate soon. +
`syncLoopDoneCh` - indicates that the `syncLoop()` has terminated.
Splitting these two concepts out and deferring a `close(syncLoopDoneCh)` in the
`syncLoop()` function ensures that the deadlock above should no longer occur.
We also now evict xDS connections of all proxies for the corresponding
`syncLoop()` whenever it encounters an irrecoverable error. This is done by
hoisting the new `syncLoopDoneCh` upwards so that it's visible to the xDS delta
processing. Prior to this fix, the behavior was to simply orphan them so they
would never receive catalog-registration or service-defaults updates.
* Add changelog.
* Adding explicit MPL license for sub-package
This directory and its subdirectories (packages) contain files licensed with the MPLv2 `LICENSE` file in this directory and are intentionally licensed separately from the BSL `LICENSE` file at the root of this repository.
* Adding explicit MPL license for sub-package
This directory and its subdirectories (packages) contain files licensed with the MPLv2 `LICENSE` file in this directory and are intentionally licensed separately from the BSL `LICENSE` file at the root of this repository.
* Updating the license from MPL to Business Source License
Going forward, this project will be licensed under the Business Source License v1.1. Please see our blog post for more details at <Blog URL>, FAQ at www.hashicorp.com/licensing-faq, and details of the license at www.hashicorp.com/bsl.
* add missing license headers
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
* Update copyright file headers to BUSL-1.1
---------
Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
* Stub proxycfg handler for API gateway
* Add Service Kind constants/handling for API Gateway
* Begin stubbing for SDS
* Add new Secret type to xDS order of operations
* Continue stubbing of SDS
* Iterate on proxycfg handler for API gateway
* Handle BoundAPIGateway config entry subscription in proxycfg-glue
* Add API gateway to config snapshot validation
* Add API gateway to config snapshot clone, leaf, etc.
* Subscribe to bound route + cert config entries on bound-api-gateway
* Track routes + certs on API gateway config snapshot
* Generate DeepCopy() for types used in watch.Map
* Watch all active references on api-gateway, unwatch inactive
* Track loading of initial bound-api-gateway config entry
* Use proper proto package for SDS mapping
* Use ResourceReference instead of ServiceName, collect resources
* Fix typo, add + remove TODOs
* Watch discovery chains for TCPRoute
* Add TODO for updating gateway services for api-gateway
* make proto
* Regenerate deep-copy for proxycfg
* Set datacenter on upstream ID from query source
* Watch discovery chains for http-route service backends
* Add ServiceName getter to HTTP+TCP Service structs
* Clean up unwatched discovery chains on API Gateway
* Implement watch for ingress leaf certificate
* Collect upstreams on http-route + tcp-route updates
* Remove unused GatewayServices update handler
* Remove unnecessary gateway services logic for API Gateway
* Remove outdate TODO
* Use .ToIngress where appropriate, including TODO for cleaning up
* Cancel before returning error
* Remove GatewayServices subscription
* Add godoc for handlerAPIGateway functions
* Update terminology from Connect => Consul Service Mesh
Consistent with terminology changes in https://github.com/hashicorp/consul/pull/12690
* Add missing TODO
* Remove duplicate switch case
* Rerun deep-copy generator
* Use correct property on config snapshot
* Remove unnecessary leaf cert watch
* Clean up based on code review feedback
* Note handler properties that are initialized but set elsewhere
* Add TODO for moving helper func into structs pkg
* Update generated DeepCopy code
* gofmt
* Generate DeepCopy() for API gateway listener types
* Improve variable name
* Regenerate DeepCopy() code
* Fix linting issue
* Temporarily remove the secret type from resource generation
* remove legacy tokens
* remove lingering legacy token references from docs
* update language and naming for token secrets and accessor IDs
* updates all tokenID references to clarify accessorID
* remove token type references and lookup tokens by accessorID index
* remove unnecessary constants
* replace additional tokenID param names
* Add warning info for deprecated -id parameter
Co-authored-by: Paul Glass <pglass@hashicorp.com>
* Update field comment
Co-authored-by: Paul Glass <pglass@hashicorp.com>
---------
Co-authored-by: Paul Glass <pglass@hashicorp.com>
Ensure nothing in the troubleshoot go module depends on consul's top level module. This is so we can import troubleshoot into consul-k8s and not import all of consul.
* turns troubleshoot into a go module [authored by @curtbushko]
* gets the envoy protos into the troubleshoot module [authored by @curtbushko]
* adds a new go module `envoyextensions` which has xdscommon and extensioncommon folders that both the xds package and the troubleshoot package can import
* adds testing and linting for the new go modules
* moves the unit tests in `troubleshoot/validateupstream` that depend on proxycfg/xds into the xds package, with a comment describing why those tests cannot be in the troubleshoot package
* fixes all the imports everywhere as a result of these changes
Co-authored-by: Curt Bushko <cbushko@gmail.com>
* Add Tproxy support to Envoy Extensions (this is needed for service to service validation)
* Add validation for Envoy configuration for an upstream service
* Use both /config_dump and /cluster to validate Envoy configuration
This is because of a bug in Envoy where the EndpointsConfigDump does not
include a cluster_name, making it impossible to match an endpoint to
verify it exists.
This removes endpoints support for builtin extensions since only the
validate plugin was using it, and it is no longer used. It also removes
test cases for endpoint validation. Endpoints validation now only occurs
in the top level test from config_dump and clusters json files.
Co-authored-by: Eric <eric@haberkorn.co>
Previously, we'd begin a session with the xDS concurrency limiter
regardless of whether the proxy was registered in the catalog or in
the server's local agent state.
This caused problems for users who run `consul connect envoy` directly
against a server rather than a client agent, as the server's locally
registered proxies wouldn't be included in the limiter's capacity.
Now, the `ConfigSource` is responsible for beginning the session and we
only do so for services in the catalog.
Fixes: https://github.com/hashicorp/consul/issues/15753
Prior to #13244, connect proxies and gateways could only be configured by an
xDS session served by the local client agent.
In an upcoming release, it will be possible to deploy a Consul service mesh
without client agents. In this model, xDS sessions will be handled by the
servers themselves, which necessitates load-balancing to prevent a single
server from receiving a disproportionate amount of load and becoming
overwhelmed.
This introduces a simple form of load-balancing where Consul will attempt to
achieve an even spread of load (xDS sessions) between all healthy servers.
It does so by implementing a concurrent session limiter (limiter.SessionLimiter)
and adjusting the limit according to autopilot state and proxy service
registrations in the catalog.
If a server is already over capacity (i.e. the session limit is lowered),
Consul will begin draining sessions to rebalance the load. This will result
in the client receiving a `RESOURCE_EXHAUSTED` status code. It is the client's
responsibility to observe this response and reconnect to a different server.
Users of the gRPC client connection brokered by the
consul-server-connection-manager library will get this for free.
The rate at which Consul will drain sessions to rebalance load is scaled
dynamically based on the number of proxies in the catalog.
This is the OSS portion of enterprise PR 2339.
It improves our handling of "irrecoverable" errors in proxycfg data sources.
The canonical example of this is what happens when the ACL token presented by
Envoy is deleted/revoked. Previously, the stream would get "stuck" until the
xDS server re-checked the token (after 5 minutes) and terminated the stream.
Materializers would also sit burning resources retrying something that could
never succeed.
Now, it is possible for data sources to mark errors as "terminal" which causes
the xDS stream to be closed immediately. Similarly, the submatview.Store will
evict materializers when it observes they have encountered such an error.
Previously, public referred to gRPC services that are both exposed on
the dedicated gRPC port and have their definitions in the proto-public
directory (so were considered usable by 3rd parties). Whereas private
referred to services on the multiplexed server port that are only usable
by agents and other servers.
Now, we're splitting these definitions, such that external/internal
refers to the port and public/private refers to whether they can be used
by 3rd parties.
This is necessary because the peering replication API needs to be
exposed on the dedicated port, but is not (yet) suitable for use by 3rd
parties.
This is the OSS portion of enterprise PR 1994
Rather than directly interrogating the agent-local state for HTTP
checks using the `HTTPCheckFetcher` interface, we now rely on the
config snapshot containing the checks.
This reduces the number of changes required to support server xDS
sessions.
It's not clear why the fetching approach was introduced in
931d167ebb.
OSS port of enterprise PR 1822
Includes the necessary changes to the `proxycfg` and `xds` packages to enable
Consul servers to configure arbitrary proxies using catalog data.
Broadly, `proxycfg.Manager` now has public methods for registering,
deregistering, and listing registered proxies — the existing local agent
state-sync behavior has been moved into a separate component that makes use of
these methods.
When an xDS session is started for a proxy service in the catalog, a goroutine
will be spawned to watch the service in the server's state store and
re-register it with the `proxycfg.Manager` whenever it is updated (and clean
it up when the client goes away).
Adds a new gRPC streaming endpoint (WatchRoots) that dataplane clients will
use to fetch the current list of active Connect CA roots and receive new
lists whenever the roots are rotated.
Introduces the capability to configure TLS differently for Consul's
listeners/ports (i.e. HTTPS, gRPC, and the internal multiplexed RPC
port) which is useful in scenarios where you may want the HTTPS or
gRPC interfaces to present a certificate signed by a well-known/public
CA, rather than the certificate used for internal communication which
must have a SAN in the form `server.<dc>.consul`.
* First pass for helper for bulk changes
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Convert ACLRead and ACLWrite to new form
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* AgentRead and AgentWRite
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Fix EventWrite
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* KeyRead, KeyWrite, KeyList
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* KeyRing
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* NodeRead NodeWrite
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* OperatorRead and OperatorWrite
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* PreparedQuery
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Intention partial
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Fix ServiceRead, Write ,etc
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Error check ServiceRead?
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Fix Sessionread/Write
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Fixup snapshot ACL
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Error fixups for txn
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Add changelog
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
* Fixup review comments
Signed-off-by: Mark Anderson <manderson@hashicorp.com>
The DebugConfig in the self endpoint can change at any time. It's not a stable API.
This commit adds the XDSPort to a stable part of the XDS api, and changes the envoy command to read
this new field.
It includes support for the old API as well, in case a newer CLI is used with an older API, and
adds a test for both cases.
Fixes#10563
The `resourceVersion` map was doing two jobs prior to this PR. The first job was
to track what version of every resource we know envoy currently has. The
second was to track subscriptions to those resources (by way of the empty
string for a version). This mostly works out fine, but occasionally leads to
consul removing a resource and accidentally (effectively) unsubscribing at the
same time.
The fix separates these two jobs. When all of the resources for a subscription
are removed we continue to track the subscription until envoy explicitly
unsubscribes
1) xds and grpc servers:
1.1) to use recovery middleware with callback that prints stack trace to log
1.2) callback turn the panic into a core.Internal error
2) added unit test for grpc server
Follow up to https://github.com/hashicorp/consul/pull/10737#discussion_r682147950
Renames all variables for acl.Authorizer to use `authz`. Previously some
places used `rule` which I believe was an old name carried over from the
legacy ACL system.
A couple places also used authorizer.
This commit also removes another couple of authorizer nil checks that
are no longer necessary.
This adds support for the Incremental xDS protocol when using xDS v3. This is best reviewed commit-by-commit and will not be squashed when merged.
Union of all commit messages follows to give an overarching summary:
xds: exclusively support incremental xDS when using xDS v3
Attempts to use SoTW via v3 will fail, much like attempts to use incremental via v2 will fail.
Work around a strange older envoy behavior involving empty CDS responses over incremental xDS.
xds: various cleanups and refactors that don't strictly concern the addition of incremental xDS support
Dissolve the connectionInfo struct in favor of per-connection ResourceGenerators instead.
Do a better job of ensuring the xds code uses a well configured logger that accurately describes the connected client.
xds: pull out checkStreamACLs method in advance of a later commit
xds: rewrite SoTW xDS protocol tests to use protobufs rather than hand-rolled json strings
In the test we very lightly reuse some of the more boring protobuf construction helper code that is also technically under test. The important thing of the protocol tests is testing the protocol. The actual inputs and outputs are largely already handled by the xds golden output tests now so these protocol tests don't have to do double-duty.
This also updates the SoTW protocol test to exclusively use xDS v2 which is the only variant of SoTW that will be supported in Consul 1.10.
xds: default xds.Server.AuthCheckFrequency at use-time instead of construction-time
Derek Menteer
Ashwin Venkatesh
John Murret
Nitya Dhanushkodi
hashicorp-copywrite[bot]
Ronald
Nathan Coleman
skpratt
Dan Upton
Chris S. Kim
Eric Haberkorn
Paul Glass
malizz
Eric
Mark Anderson
Giulio Micheloni
Evan Culver
Daniel Nephin
R.B. Boyer
Freddy