Commit Graph

437 Commits

Author SHA1 Message Date
R.B. Boyer ae79cdab1b
connect: introduce ExternalSNI field on service-defaults (#6324)
Compiling this will set an optional SNI field on each DiscoveryTarget.
When set this value should be used for TLS connections to the instances
of the target. If not set the default should be used.

Setting ExternalSNI will disable mesh gateway use for that target. It also 
disables several service-resolver features that do not make sense for an 
external service.
2019-08-19 12:19:44 -05:00
R.B. Boyer 72207256b9
xds: improve how envoy metrics are emitted (#6312)
Since generated envoy clusters all are named using (mostly) SNI syntax
we can have envoy read the various fields out of that structure and emit
it as stats labels to the various telemetry backends.

I changed the delimiter for the 'customization hash' from ':' to '~'
because ':' is always reencoded by envoy as '_' when generating metrics
keys.
2019-08-16 09:30:17 -05:00
R.B. Boyer 8e22d80e35
connect: fix failover through a mesh gateway to a remote datacenter (#6259)
Failover is pushed entirely down to the data plane by creating envoy
clusters and putting each successive destination in a different load
assignment priority band. For example this shows that normally requests
go to 1.2.3.4:8080 but when that fails they go to 6.7.8.9:8080:

- name: foo
  load_assignment:
    cluster_name: foo
    policy:
      overprovisioning_factor: 100000
    endpoints:
    - priority: 0
      lb_endpoints:
      - endpoint:
          address:
            socket_address:
              address: 1.2.3.4
              port_value: 8080
    - priority: 1
      lb_endpoints:
      - endpoint:
          address:
            socket_address:
              address: 6.7.8.9
              port_value: 8080

Mesh gateways route requests based solely on the SNI header tacked onto
the TLS layer. Envoy currently only lets you configure the outbound SNI
header at the cluster layer.

If you try to failover through a mesh gateway you ideally would
configure the SNI value per endpoint, but that's not possible in envoy
today.

This PR introduces a simpler way around the problem for now:

1. We identify any target of failover that will use mesh gateway mode local or
   remote and then further isolate any resolver node in the compiled discovery
   chain that has a failover destination set to one of those targets.

2. For each of these resolvers we will perform a small measurement of
   comparative healths of the endpoints that come back from the health API for the
   set of primary target and serial failover targets. We walk the list of targets
   in order and if any endpoint is healthy we return that target, otherwise we
   move on to the next target.

3. The CDS and EDS endpoints both perform the measurements in (2) for the
   affected resolver nodes.

4. For CDS this measurement selects which TLS SNI field to use for the cluster
   (note the cluster is always going to be named for the primary target)

5. For EDS this measurement selects which set of endpoints will populate the
   cluster. Priority tiered failover is ignored.

One of the big downsides to this approach to failover is that the failover
detection and correction is going to be controlled by consul rather than
deferring that entirely to the data plane as with the prior version. This also
means that we are bound to only failover using official health signals and
cannot make use of data plane signals like outlier detection to affect
failover.

In this specific scenario the lack of data plane signals is ok because the
effectiveness is already muted by the fact that the ultimate destination
endpoints will have their data plane signals scrambled when they pass through
the mesh gateway wrapper anyway so we're not losing much.

Another related fix is that we now use the endpoint health from the
underlying service, not the health of the gateway (regardless of
failover mode).
2019-08-05 13:30:35 -05:00
R.B. Boyer c395affc93
connect: expose an API endpoint to compile the discovery chain (#6248)
In addition to exposing compilation over the API cleaned up the structures that would be exchanged to be cleaner and easier to support and understand.

Also removed ability to configure the envoy OverprovisioningFactor.
2019-08-02 15:34:54 -05:00
R.B. Boyer f02924fafe
connect: simplify the compiled discovery chain data structures (#6242)
This should make them better for sending over RPC or the API.

Instead of a chain implemented explicitly like a linked list (nodes
holding pointers to other nodes) instead switch to a flat map of named
nodes with nodes linking other other nodes by name. The shipped
structure is just a map and a string to indicate which key to start
from.

Other changes:

* inline the compiler option InferDefaults as true

* introduce compiled target config to avoid needing to send back
  additional maps of Resolvers; future target-specific compiled state
  can go here

* move compiled MeshGateway out of the Resolver and into the
  TargetConfig where it makes more sense.
2019-08-01 22:44:05 -05:00
R.B. Boyer 6393edba53
connect: reconcile how upstream configuration works with discovery chains (#6225)
* connect: reconcile how upstream configuration works with discovery chains

The following upstream config fields for connect sidecars sanely
integrate into discovery chain resolution:

- Destination Namespace/Datacenter: Compilation occurs locally but using
different default values for namespaces and datacenters. The xDS
clusters that are created are named as they normally would be.

- Mesh Gateway Mode (single upstream): If set this value overrides any
value computed for any resolver for the entire discovery chain. The xDS
clusters that are created may be named differently (see below).

- Mesh Gateway Mode (whole sidecar): If set this value overrides any
value computed for any resolver for the entire discovery chain. If this
is specifically overridden for a single upstream this value is ignored
in that case. The xDS clusters that are created may be named differently
(see below).

- Protocol (in opaque config): If set this value overrides the value
computed when evaluating the entire discovery chain. If the normal chain
would be TCP or if this override is set to TCP then the result is that
we explicitly disable L7 Routing and Splitting. The xDS clusters that
are created may be named differently (see below).

- Connect Timeout (in opaque config): If set this value overrides the
value for any resolver in the entire discovery chain. The xDS clusters
that are created may be named differently (see below).

If any of the above overrides affect the actual result of compiling the
discovery chain (i.e. "tcp" becomes "grpc" instead of being a no-op
override to "tcp") then the relevant parameters are hashed and provided
to the xDS layer as a prefix for use in naming the Clusters. This is to
ensure that if one Upstream discovery chain has no overrides and
tangentially needs a cluster named "api.default.XXX", and another
Upstream does have overrides for "api.default.XXX" that they won't
cross-pollinate against the operator's wishes.

Fixes #6159
2019-08-01 22:03:34 -05:00
Matt Keeler fcc18c1675
Fix prepared query upstream endpoint generation (#6236)
Use the correct SNI value for prepared query upstreams
2019-07-29 11:15:55 -04:00
R.B. Boyer ad9e7b6ae9
connect: allow L7 routers to match on http methods (#6164)
Fixes #6158
2019-07-23 20:56:39 -05:00
R.B. Boyer 85cf2706e6
connect: change router syntax for matching query parameters to resemble the syntax for matching paths and headers for consistency. (#6163)
This is a breaking change, but only in the context of the beta series.
2019-07-23 20:55:26 -05:00
R.B. Boyer 1dbd92e091
connect: validate and test more of the L7 config entries (#6156) 2019-07-23 20:50:23 -05:00
R.B. Boyer e039dfd7f8
connect: rework how the service resolver subset OnlyPassing flag works (#6173)
The main change is that we no longer filter service instances by health,
preferring instead to render all results down into EDS endpoints in
envoy and merely label the endpoints as HEALTHY or UNHEALTHY.

When OnlyPassing is set to true we will force consul checks in a
'warning' state to render as UNHEALTHY in envoy.

Fixes #6171
2019-07-23 20:20:24 -05:00
hashicorp-ci a4431da1cc Merge Consul OSS branch 'master' at commit ef257b084d 2019-07-20 02:00:29 +00:00
Christian Muehlhaeuser 16193665ca Fixed a few tautological condition mistakes (#6177)
None of these changes should have any side-effects. They're merely
fixing tautological mistakes.
2019-07-19 07:53:42 -04:00
R.B. Boyer d7a5158805
xds: allow http match criteria to be applied to routes on services using grpc protocols (#6149) 2019-07-17 14:07:08 -05:00
R.B. Boyer bcd2de3a2e
implement some missing service-router features and add more xDS testing (#6065)
- also implement OnlyPassing filters for non-gateway clusters
2019-07-12 14:16:21 -05:00
Jack Pearkes e6f1b78efb Make cluster names SNI always (#6081)
* Make cluster names SNI always

* Update some tests

* Ensure we check for prepared query types

* Use sni for route cluster names

* Proper mesh gateway mode defaulting when the discovery chain is used

* Ignore service splits from PatchSliceOfMaps

* Update some xds golden files for proper test output

* Allow for grpc/http listeners/cluster configs with the disco chain

* Update stats expectation
2019-07-08 12:48:48 +01:00
Michael Schurter b5aab27c21 connect: allow overriding envoy listener bind_address (#6033)
* connect: allow overriding envoy listener bind_address

* Update agent/xds/config.go

Co-Authored-By: Kyle Havlovitz <kylehav@gmail.com>

* connect: allow overriding envoy listener bind_port

* envoy: support unix sockets for grpc in bootstrap

Add AgentSocket BootstrapTplArgs which if set overrides the AgentAddress
and AgentPort to generate a bootstrap which points Envoy to a unix
socket file instead of an ip:port.

* Add a test for passing the consul addr as a unix socket

* Fix config formatting for envoy bootstrap tests

* Fix listeners test cases for bind addr/port

* Update website/source/docs/connect/proxies/envoy.md
2019-07-05 16:06:47 +01:00
Matt Keeler 62ad0294d4 Don't use WatchedDatacenters in the xds code as thsoe get nil'ed out prior to sending to xds 2019-07-03 09:59:21 -04:00
Matt Keeler 25f580bcaa Fix a bunch of xds flaky tests
The clusters/endpoints test were still relying on deterministic ordering of clusters/endpoints which cannot be relied upon due to golang purposefully not providing any guarantee about consistent interation ordering of maps.

Also fixed a small bug in the connect proxy cluster generation that was causing the clusters slice to be double the size it needed to with the first half being all nil pointers.
2019-07-02 15:53:06 -04:00
Matt Keeler a8e2e866e3 Update xds/proxycfg tests to use the same looking trust domain as a normal system
This is to prevent confusion about what our SNI fields actually look like.
2019-07-02 10:29:37 -04:00
Matt Keeler a7421c160f Implement mesh gateway management of service subsets
Fixup some error handling
2019-07-02 10:29:37 -04:00
R.B. Boyer 4bdb690a25
activate most discovery chain features in xDS for envoy (#6024) 2019-07-01 22:10:51 -05:00
Matt Keeler 8d953f5840 Implement Mesh Gateways
This includes both ingress and egress functionality.
2019-07-01 16:28:30 -04:00
R.B. Boyer 38d76c624e
Allow for both snake_case and CamelCase for config entries written with 'consul config write'. (#6044)
This also has the added benefit of fixing an issue with passing
time.Duration fields through config entries.
2019-06-28 11:35:35 -05:00
Matt Keeler 813e009a2d
Prepare for having different service kinds that are all generic… (#6013)
Default to internal error when service kind is unknown
2019-06-24 15:05:36 -04:00
Paul Banks ffcfdf29fc
Upgrade xDS (go-control-plane) API to support Envoy 1.10. (#5872)
* Upgrade xDS (go-control-plane) API to support Envoy 1.10.

This includes backwards compatibility shim to work around the ext_authz package rename in 1.10.

It also adds integration test support in CI for 1.10.0.

* Fix go vet complaints

* go mod vendor

* Update Envoy version info in docs

* Update website/source/docs/connect/proxies/envoy.md
2019-06-07 07:10:43 -05:00
Matt Keeler 2ba6c3ac00
Update links to envoy docs on xDS protocol (#5871) 2019-06-03 11:03:05 -05:00
Paul Banks 421ecd32fc
Connect: allow configuring Envoy for L7 Observability (#5558)
* Add support for HTTP proxy listeners

* Add customizable bootstrap configuration options

* Debug logging for xDS AuthZ

* Add Envoy Integration test suite with basic test coverage

* Add envoy command tests to cover new cases

* Add tracing integration test

* Add gRPC support WIP

* Merged changes from master Docker. get CI integration to work with same Dockerfile now

* Make docker build optional for integration

* Enable integration tests again!

* http2 and grpc integration tests and fixes

* Fix up command config tests

* Store all container logs as artifacts in circle on fail

* Add retries to outer part of stats measurements as we keep missing them in CI

* Only dump logs on failing cases

* Fix typos from code review

* Review tidying and make tests pass again

* Add debug logs to exec test.

* Fix legit test failure caused by upstream rename in envoy config

* Attempt to reduce cases of bad TLS handshake in CI integration tests

* bring up the right service

* Add prometheus integration test

* Add test for denied AuthZ both HTTP and TCP

* Try ANSI term for Circle
2019-04-29 17:27:57 +01:00
Paul Banks 89fa5ec3ba
Connect: Fix Envoy getting stuck during load (#5499)
* Connect: Fix Envoy getting stuck during load

Also in this PR:
 - Enabled outlier detection on upstreams which will mark instances unhealthy after 5 failures (using Envoy's defaults)
 - Enable weighted load balancing where DNS weights are configured

* Fix empty load assignments in the right place

* Fix import names from review

* Move millisecond parse to a helper function
2019-03-22 19:37:14 +00:00
R.B. Boyer f4a3b9d518
fix typos reported by golangci-lint:misspell (#5434) 2019-03-06 11:13:28 -06:00
Nicholas Jackson 99fe9dabce Envoy config cluster (#5308)
* Start adding tests for cluster override

* Refactor tests for clusters

* Passing tests for custom upstream cluster override

* Added capability to customise local app cluster

* Rename config for local cluster override
2019-02-19 13:45:33 +00:00
R.B. Boyer d3eb781384 Check ACLs more often for xDS endpoints.
For established xDS gRPC streams recheck ACLs for each DiscoveryRequest
or DiscoveryResponse. If more than 5 minutes has elapsed since the last
ACL check, recheck even without an incoming DiscoveryRequest or
DiscoveryResponse. ACL failures will terminate the stream.
2019-01-22 11:12:40 -06:00
R.B. Boyer 2dea3e2bd7 Fix some test typos. 2019-01-18 16:12:43 -06:00
Matt Keeler 18b29c45c4
New ACLs (#4791)
This PR is almost a complete rewrite of the ACL system within Consul. It brings the features more in line with other HashiCorp products. Obviously there is quite a bit left to do here but most of it is related docs, testing and finishing the last few commands in the CLI. I will update the PR description and check off the todos as I finish them over the next few days/week.
Description

At a high level this PR is mainly to split ACL tokens from Policies and to split the concepts of Authorization from Identities. A lot of this PR is mostly just to support CRUD operations on ACLTokens and ACLPolicies. These in and of themselves are not particularly interesting. The bigger conceptual changes are in how tokens get resolved, how backwards compatibility is handled and the separation of policy from identity which could lead the way to allowing for alternative identity providers.

On the surface and with a new cluster the ACL system will look very similar to that of Nomads. Both have tokens and policies. Both have local tokens. The ACL management APIs for both are very similar. I even ripped off Nomad's ACL bootstrap resetting procedure. There are a few key differences though.

    Nomad requires token and policy replication where Consul only requires policy replication with token replication being opt-in. In Consul local tokens only work with token replication being enabled though.
    All policies in Nomad are globally applicable. In Consul all policies are stored and replicated globally but can be scoped to a subset of the datacenters. This allows for more granular access management.
    Unlike Nomad, Consul has legacy baggage in the form of the original ACL system. The ramifications of this are:
        A server running the new system must still support other clients using the legacy system.
        A client running the new system must be able to use the legacy RPCs when the servers in its datacenter are running the legacy system.
        The primary ACL DC's servers running in legacy mode needs to be a gate that keeps everything else in the entire multi-DC cluster running in legacy mode.

So not only does this PR implement the new ACL system but has a legacy mode built in for when the cluster isn't ready for new ACLs. Also detecting that new ACLs can be used is automatic and requires no configuration on the part of administrators. This process is detailed more in the "Transitioning from Legacy to New ACL Mode" section below.
2018-10-19 12:04:07 -04:00
Paul Banks c9217c958e merge feedback: fix typos; actually use deliverLatest added previously but not plumbed in 2018-10-10 16:55:34 +01:00
Paul Banks dca1303d05 Connect Envoy Command (#4735)
* Plumb xDS server and proxyxfg into the agent startup

* Add `consul connect envoy` command to allow running Envoy as a connect sidecar.

* Add test for help tabs; typos and style fixups from review
2018-10-10 16:55:34 +01:00
Paul Banks 1909a95118 xDS Server Implementation (#4731)
* Vendor updates for gRPC and xDS server

* xDS server implementation for serving Envoy as a Connect proxy

* Address initial review comments

* consistent envoy package aliases; typos fixed; override TLS and authz for custom listeners

* Moar Typos

* Moar typos
2018-10-10 16:55:34 +01:00