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
```
Consolidate code duplication and tests into a single lib package. Most of these functions were from various **/util.go functions that couldn't be imported due to cyclic imports. The consul/lib package is intended to be a terminal node in an import DAG and a place to stash various consul-only helper functions. Pulled in hashicorp/go-uuid instead of consolidating UUID access.
Fixes#550.
This will make it possible to configure the advertised adresses for
SerfLan, SerfWan and RPC. It will enable multiple consul clients on a
single host which is very useful in a container environment.
This option might override advertise_addr and advertise_addr_wan
depending on the configuration.
It will be configureable with advertise_addrs. Example:
{
"advertise_addrs": {
"serf_lan": "10.0.120.91:4424",
"serf_wan": "201.20.10.61:4423",
"rpc": "10.20.10.61:4424"
}
}
Chris Marchesi