This PR allows tuning of heartbeat TTLs. An example of very aggressive
settings is as follows:
```
server {
heartbeat_grace = "1s"
min_heartbeat_ttl = "1s"
max_heartbeats_per_second = 200.0
}
```
A fix to #2739 instead of forcing IPv6 users to always specify a port as
well.
Prior to this commit IPv6 advertise addresses which lacked a port would
fail instead of having the default port added because
`net.SplitHostPort(someipv6)` returns a different error than
`net.SplitHostPort(someipv4)`.
A slight improvement to #2399 - if bind is localhost, return an error
instead of advertising a private ip. The advertised ip isn't valid and
will just cause errors on use. It's better to fail with an error message
instructing users how to fix the problem.
This PR:
* Uses Go 1.8 executable lookup
* Stores any err message from stats init method
* Allows overriding of Cpu Compute for hosts where it can't be detected
This PR introduces a parallelism limit during garbage collection. This
is used to avoid large resource usage spikes if garbage collecting many
allocations at once.
On startup, the agent starts with either a dev or default config. Extra
config files are merged into final config.
The HTTPAPIResponseHeaders config was missing from the merge logic
therefore it would always result in empty value (regardlesss of any
config files specified).
* Truncate all UUID identifiers to eight characters by default
* Refactor the node identifier to an auto-generated UUID
* Created and updated tests and mocks
This change ensures LoadConfig and LoadConfigDir report consistent paths to files and those paths use the appropriate path separator for the target OS. Note that LoadConfigDir constructs paths with filepath.Join, which calls filepath.Clean, which calls filepath.FromSlash.
