This makes the upgrade path a bit nicer, since people will likely have
older configurations. This prints out a warning instead of just failing
if the old rpc addr or ports definition is in the config.
This adds two goroutines to perform autopilot tasks on the leader - one
to monitor the health of servers and another to periodically clean up
dead servers with a limit on removal count. Also adds a new http endpoint,
`/v1/operator/autopilot/health`, for querying this information through an
operator RPC endpoint.
This commit adds several command-line and config options that facilitate
host discovery through Google Compute Engine (GCE), much like the
recently added EC2 host discovery options. This should assist with
bootstrapping and joining servers within GCE when non-static addresses
are used, such as when using managed instance groups.
Documentation has also been added. It should be noted that if running
from within a GCE instance, the only option that should be necessary is
-retry-join-gce-tag-value.
* * adding cli config and config file support for specifying the serf wan and lan bind addresses
* updating documentation for serf wan and lan options
Fixes#2007
* Cleans up some small things from #2380.
* Uses the bind default for the agent test for Serf WAN and LAN.
IP sockets provide nice endpoints where the kernel will fail to bind and will error out saying socket already in use. UNIX sockets, however, don't enjoy this nice property when cleaning up stale sockets on listen. Given the number of addresses in Consul, provide operators with a helpful message that indicates the source of the reused address.
Before this fix, it was possible for the HTTP socket to unlink the RPC socket, leading to confusing blocked behavior when running commands like `consul info`.
```
% cat tmp.config.json
{
"addresses": {
"http": "unix:///tmp/.consul.sock",
"rpc": "unix:///tmp/.consul.sock"
},
"unix_sockets": {
"mode": "0700"
}
}
% consul agent -config-file tmp.config.json -advertise=127.0.0.1 -data-dir=/tmp/
==> All listening endpoints must be unique: HTTP address already configured for RPC
Exit 1
```
