Fix mesh gateways incorrectly matching peer locality.
This fixes an issue where local mesh gateways use an
incorrect address when attempting to forward traffic to a
peered datacenter. Prior to this change it would use the
lan address instead of the wan if the locality matched. This
should never be done for peering, since we must route all
traffic through the remote mesh gateway.
* 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
* Begin stubbing for SDS
* Start adding tests
* Remove second BoundAPIGateway case in glue
* TO BE PICKED: fix formatting of str
* WIP
* Fix merge conflict
* Implement HTTP Route to Discovery Chain config entries
* Stub out function to create discovery chain
* Add discovery chain merging code (#16131)
* Test adding TCP and HTTP routes
* Add some tests for the synthesizer
* Run go mod tidy
* Pairing with N8
* Run deep copy
* Clean up GatewayChainSynthesizer
* Fix missing assignment of BoundAPIGateway topic
* Separate out synthesizeChains and toIngressTLS
* Fix build errors
* Ensure synthesizer skips non-matching routes by protocol
* Rebase on N8s work
* Generate DeepCopy() for API gateway listener types
* Improve variable name
* Regenerate DeepCopy() code
* Fix linting issue
* fix protobuf import
* Fix more merge conflict errors
* Fix synthesize test
* Run deep copy
* Add URLRewrite to proto
* Update agent/consul/discoverychain/gateway_tcproute.go
Co-authored-by: Nathan Coleman <nathan.coleman@hashicorp.com>
* Remove APIGatewayConfigEntry that was extra
* Error out if route kind is unknown
* Fix formatting errors in proto
---------
Co-authored-by: Nathan Coleman <nathan.coleman@hashicorp.com>
Co-authored-by: Andrew Stucki <andrew.stucki@hashicorp.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
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>
Fix configuration merging for implicit tproxy upstreams.
Change the merging logic so that the wildcard upstream has correct proxy-defaults
and service-defaults values combined into it. It did not previously merge all fields,
and the wildcard upstream did not exist unless service-defaults existed (it ignored
proxy-defaults, essentially).
Change the way we fetch upstream configuration in the xDS layer so that it falls back
to the wildcard when no matching upstream is found. This is what allows implicit peer
upstreams to have the correct "merged" config.
Change proxycfg to always watch local mesh gateway endpoints whenever a peer upstream
is found. This simplifies the logic so that we do not have to inspect the "merged"
configuration on peer upstreams to extract the mesh gateway mode.
* Protobuf Modernization
Remove direct usage of golang/protobuf in favor of google.golang.org/protobuf
Marshallers (protobuf and json) needed some changes to account for different APIs.
Moved to using the google.golang.org/protobuf/types/known/* for the well known types including replacing some custom Struct manipulation with whats available in the structpb well known type package.
This also updates our devtools script to install protoc-gen-go from the right location so that files it generates conform to the correct interfaces.
* Fix go-mod-tidy make target to work on all modules
Fix local mesh gateway with peering discovery chains.
Prior to this patch, discovery chains with peers would not
properly honor the mesh gateway mode for two reasons.
1. An incorrect target upstream ID was used to lookup the
mesh gateway mode. To fix this, the parent upstream uid is
now used instead of the discovery-chain-target-uid to find
the intended mesh gateway mode.
2. The watch for local mesh gateways was never initialized
for discovery chains. To fix this, the discovery chains are
now scanned, and a local GW watch is spawned if: the mesh
gateway mode is local and the target is a peering connection.
* Fix mesh gateway proxy-defaults not affecting upstreams.
* Clarify distinction with upstream settings
Top-level mesh gateway mode in proxy-defaults and service-defaults gets
merged into NodeService.Proxy.MeshGateway, and only gets merged with
the mode attached to an an upstream in proxycfg/xds.
* Fix mgw mode usage for peered upstreams
There were a couple issues with how mgw mode was being handled for
peered upstreams.
For starters, mesh gateway mode from proxy-defaults
and the top-level of service-defaults gets stored in
NodeService.Proxy.MeshGateway, but the upstream watch for peered data
was only considering the mesh gateway config attached in
NodeService.Proxy.Upstreams[i]. This means that applying a mesh gateway
mode via global proxy-defaults or service-defaults on the downstream
would not have an effect.
Separately, transparent proxy watches for peered upstreams didn't
consider mesh gateway mode at all.
This commit addresses the first issue by ensuring that we overlay the
upstream config for peered upstreams as we do for non-peered. The second
issue is addressed by re-using setupWatchesForPeeredUpstream when
handling transparent proxy updates.
Note that for transparent proxies we do not yet support mesh gateway
mode per upstream, so the NodeService.Proxy.MeshGateway mode is used.
* Fix upstream mesh gateway mode handling in xds
This commit ensures that when determining the mesh gateway mode for
peered upstreams we consider the NodeService.Proxy.MeshGateway config as
a baseline.
In absense of this change, setting a mesh gateway mode via
proxy-defaults or the top-level of service-defaults will not have an
effect for peered upstreams.
* Merge service/proxy defaults in cfg resolver
Previously the mesh gateway mode for connect proxies would be
merged at three points:
1. On servers, in ComputeResolvedServiceConfig.
2. On clients, in MergeServiceConfig.
3. On clients, in proxycfg/xds.
The first merge returns a ServiceConfigResponse where there is a
top-level MeshGateway config from proxy/service-defaults, along with
per-upstream config.
The second merge combines per-upstream config specified at the service
instance with per-upstream config specified centrally.
The third merge combines the NodeService.Proxy.MeshGateway
config containing proxy/service-defaults data with the per-upstream
mode. This third merge is easy to miss, which led to peered upstreams
not considering the mesh gateway mode from proxy-defaults.
This commit removes the third merge, and ensures that all mesh gateway
config is available at the upstream. This way proxycfg/xds do not need
to do additional overlays.
* Ensure that proxy-defaults is considered in wc
Upstream defaults become a synthetic Upstream definition under a
wildcard key "*". Now that proxycfg/xds expect Upstream definitions to
have the final MeshGateway values, this commit ensures that values from
proxy-defaults/service-defaults are the default for this synthetic
upstream.
* Add changelog.
Co-authored-by: freddygv <freddy@hashicorp.com>
This commit adds the xDS resources needed for INBOUND traffic from peer
clusters:
- 1 filter chain for all inbound peering requests.
- 1 cluster for all inbound peering requests.
- 1 endpoint per voting server with the gRPC TLS port configured.
There is one filter chain and cluster because unlike with WAN
federation, peer clusters will not attempt to dial individual servers.
Peer clusters will only dial the local mesh gateway addresses.
Routing peering control plane traffic through mesh gateways can be
enabled or disabled at runtime with the mesh config entry.
This commit updates proxycfg to add or cancel watches for local servers
depending on this central config.
Note that WAN federation over mesh gateways is determined by a service
metadata flag, and any updates to the gateway service registration will
force the creation of a new snapshot. If enabled, WAN-fed over mesh
gateways will trigger a local server watch on initialize().
Because of this we will only add/remove server watches if WAN federation
over mesh gateways is disabled.
Now that peered upstreams can generate envoy resources (#13758), we need a way to disambiguate local from peered resources in our metrics. The key difference is that datacenter and partition will be replaced with peer, since in the context of peered resources partition is ambiguous (could refer to the partition in a remote cluster or one that exists locally). The partition and datacenter of the proxy will always be that of the source service.
Regexes were updated to make emitting datacenter and partition labels mutually exclusive with peer labels.
Listener filter names were updated to better match the existing regex.
Cluster names assigned to peered upstreams were updated to be synthesized from local peer name (it previously used the externally provided primary SNI, which contained the peer name from the other side of the peering). Integration tests were updated to assert for the new peer labels.
Peered upstreams has a separate loop in xds from discovery chain upstreams. This PR adds similar but slightly modified code to add filters for peered upstream listeners, clusters, and endpoints in the case of transparent proxy.
Because peerings are pairwise, between two tuples of (datacenter,
partition) having any exported reference via a discovery chain that
crosses out of the peered datacenter or partition will ultimately not be
able to work for various reasons. The biggest one is that there is no
way in the ultimate destination to configure an intention that can allow
an external SpiffeID to access a service.
This PR ensures that a user simply cannot do this, so they won't run
into weird situations like this.
Mesh gateways can use hostnames in their tagged addresses (#7999). This is useful
if you were to expose a mesh gateway using a cloud networking load balancer appliance
that gives you a DNS name but no reliable static IPs.
Envoy cannot accept hostnames via EDS and those must be configured using CDS.
There was already logic when configuring gateways in other locations in the code, but
given the illusions in play for peering the downstream of a peered service wasn't aware
that it should be doing that.
Also:
- ensuring that we always try to use wan-like addresses to cross peer boundaries.
For mTLS to work between two proxies in peered clusters with different root CAs,
proxies need to configure their outbound listener to use different root certificates
for validation.
Up until peering was introduced proxies would only ever use one set of root certificates
to validate all mesh traffic, both inbound and outbound. Now an upstream proxy
may have a leaf certificate signed by a CA that's different from the dialing proxy's.
This PR makes changes to proxycfg and xds so that the upstream TLS validation
uses different root certificates depending on which cluster is being dialed.
Due to timing, a transparent proxy could have two upstreams to dial
directly with the same address.
For example:
- The orders service can dial upstreams shipping and payment directly.
- An instance of shipping at address 10.0.0.1 is deregistered.
- Payments is scaled up and scheduled to have address 10.0.0.1.
- The orders service receives the event for the new payments instance
before seeing the deregistration for the shipping instance. At this
point two upstreams have the same passthrough address and Envoy will
reject the listener configuration.
To disambiguate this commit considers the Raft index when storing
passthrough addresses. In the example above, 10.0.0.1 would only be
associated with the newer payments service instance.
The gist here is that now we use a value-type struct proxycfg.UpstreamID
as the map key in ConfigSnapshot maps where we used to use "upstream
id-ish" strings. These are internal only and used just for bidirectional
trips through the agent cache keyspace (like the discovery chain target
struct).
For the few places where the upstream id needs to be projected into xDS,
that's what (proxycfg.UpstreamID).EnvoyID() is for. This lets us ALWAYS
inject the partition and namespace into these things without making
stuff like the golden testdata diverge.
Previously we could get into a state where discovery chain entries were
not cleaned up after the associated watch was cancelled. These changes
add handling for that case where stray chain references are encountered.
Fixes an issue described in #10132, where if two DCs are WAN federated
over mesh gateways, and the gateway in the non-primary DC is terminated
and receives a new IP address (as is commonly the case when running them
on ephemeral compute instances) the primary DC is unable to re-establish
its connection until the agent running on its own gateway is restarted.
This was happening because we always preferred gateways discovered by
the `Internal.ServiceDump` RPC (which would fail because there's no way
to dial the remote DC) over those discovered in the federation state,
which is replicated as long as the primary DC's gateway is reachable.
