relates to GRU-69
Adds cluster_host and nats_port to replicas table, to explicitly track NATS routes in the cluster.
I decided to make the NATS support explicit and transport the port number over the replicasync so that different Coder Servers can run on different ports. This is not something customers will typically care about, but is very useful for testing, so that they can all run on localhost within one machine.
I've also gone with a design where the NATS pubsub directly tells replicasync the port number _after_ it opens the socket. This is also very useful for testing because it allows us to have the OS assign the port number at runtime, avoiding races where we fail to bind to a free port.
* feat: HA tailnet coordinator
* fixup! feat: HA tailnet coordinator
* fixup! feat: HA tailnet coordinator
* remove printlns
* close all connections on coordinator
* impelement high availability feature
* fixup! impelement high availability feature
* fixup! impelement high availability feature
* fixup! impelement high availability feature
* fixup! impelement high availability feature
* Add replicas
* Add DERP meshing to arbitrary addresses
* Move packages to highavailability folder
* Move coordinator to high availability package
* Add flags for HA
* Rename to replicasync
* Denest packages for replicas
* Add test for multiple replicas
* Fix coordination test
* Add HA to the helm chart
* Rename function pointer
* Add warnings for HA
* Add the ability to block endpoints
* Add flag to disable P2P connections
* Wow, I made the tests pass
* Add replicas endpoint
* Ensure close kills replica
* Update sql
* Add database latency to high availability
* Pipe TLS to DERP mesh
* Fix DERP mesh with TLS
* Add tests for TLS
* Fix replica sync TLS
* Fix RootCA for replica meshing
* Remove ID from replicasync
* Fix getting certificates for meshing
* Remove excessive locking
* Fix linting
* Store mesh key in the database
* Fix replica key for tests
* Fix types gen
* Fix unlocking unlocked
* Fix race in tests
* Update enterprise/derpmesh/derpmesh.go
Co-authored-by: Colin Adler <colin1adler@gmail.com>
* Rename to syncReplicas
* Reuse http client
* Delete old replicas on a CRON
* Fix race condition in connection tests
* Fix linting
* Fix nil type
* Move pubsub to in-memory for twenty test
* Add comment for configuration tweaking
* Fix leak with transport
* Fix close leak in derpmesh
* Fix race when creating server
* Remove handler update
* Skip test on Windows
* Fix DERP mesh test
* Wrap HTTP handler replacement in mutex
* Fix error message for relay
* Fix API handler for normal tests
* Fix speedtest
* Fix replica resend
* Fix derpmesh send
* Ping async
* Increase wait time of template version jobd
* Fix race when closing replica sync
* Add name to client
* Log the derpmap being used
* Don't connect if DERP is empty
* Improve agent coordinator logging
* Fix lock in coordinator
* Fix relay addr
* Fix race when updating durations
* Fix client publish race
* Run pubsub loop in a queue
* Store agent nodes in order
* Fix coordinator locking
* Check for closed pipe
Co-authored-by: Colin Adler <colin1adler@gmail.com>
Spike Curtis