v4.0.0

BREAKING CHANGES

This release is a pretty much entire rewrite of the gRPC transport to make it easier to handle data flows independently, and not cause one bad actor, be it client or server, to tie up the whole system.

Configuration Changes

Minor changes. Mostly these are related to adding prometheusListenPort to the client (aka agent)

Network Changes

The old agent and controller protocol are completely rewritten. They are not compatible.

Image Names

The old names of forwarder-controller and forwarder-agent have been renames to agent-controller and agent-client.

Authentication Changes

The agent used to use a TLS certificate and key. It now uses a JWT. The command-and-control API has been changed to return this JWT for the /api/v1/generateAgentManifestComponents endpoint.

Other changes

• Logging is much improved. Technical details: using the go context.Context package, a logger is added to a context with optional fields, and those fields are logged in all subsequent loggers generated from this context. This means the agent name and other details for a HTTP stream are properly logged in all cases and no longer requires explicit coding intent to add them.
• agent-client creates a prometheus HTTP service on port 9102 by default.
• The agent-controller and agent-client images have a --profile option, which will run pprof services on the prometheus HTTP server port at /debug/pprof. This is mostly used for testing and debugging, and should not generally be used.
• Many bugs were fixed by this rewrite, including handling memory in a much better way.

Issues

• Streaming HTTP sessions are not yet fully profiled, but should be working.
• "reverse connections" (incoming HTTP clients on the agent) which are serviced by the controller are not yet implemented. This will be in v4.1.

v3.5.9

What's Changed

• fix(memleak): close http response body by @skandragon in #16

Full Changelog: v3.5.8...v3.5.9

v3.5.8

What's Changed

• chore: add 'argocd' service type to docs by @skandragon in #13
• feat: log non-2xx responses agent-side by @skandragon in #14
• feat: retry initial grpc dial by @skandragon in #15

Full Changelog: v3.5.7...v3.5.8

v3.5.7

What's Changed

• feat: set X-Opsmx-Agent-Name header by @skandragon in #12

Full Changelog: v3.5.6...v3.5.7

v3.5.6

Zapify.
Also log the remote IP address on the initial agent Hello message.

v3.5.5

log credential failures

v3.5.3

add version to manifest return

v3.5.2

handle missing agentInfo

v3.5.1

handle null annotations on agentInfo

v3.5.0

Add "annotations" which is a key: value map to agentInfo and outgoing services.
These will be sent from the agent to the controller, and are shown in the getAgentStatistics API call.