This makes flags to etcdmain consistent with man page in help.go. The standard
Go flag package supports both '-' and '--', different than most of CLI
packages, but etcdctl with codegansta/cli uses double-dash('--'), which
sometimes gets confusing, especially to new users.
This fixes coreos#3647 by giving shorter proxy refresh interval whenever
there is no endpoints found. Deleted sleep command in Procfile and proxy
documentation accordingly.
This fixes#3647 by delaying proxy start by 3 seconds. Without this, proxy
starts at the same time as initial cluster and since the default proxy director
refresh interval is 30-second, if cluster is not ready at first trial, the
proxy misses to discover them and has to wait another 30-seconds, which delays
the proxying for first 30-second.
I think it makes sense to make the proxy listen on the default port so
we can give the proxy more testing by default. Also, this should make it
easy to kill a single etcd member and test that etcdctl still works,
etc.
However, I have hit a bug: the proxy takes several seconds
-bind-addr is etcd 0.4 flag, and we should deprecate it.
Moreover, this makes Procfile fit the workflow we mention in the doc,
which helps ourselves find the problem first.
This is a simple solution to having the proxy keep up to date with the
state of the cluster. Basically, it uses the cluster configuration
provided at start up (i.e. with `-initial-cluster-state`) to determine
where to reach peer(s) in the cluster, and then it will periodically hit
the `/members` endpoint of those peer(s) (using the same mechanism that
`-cluster-state=existing` does to initialise) to update the set of valid
client URLs to proxy to.
This does not address discovery (#1376), and it would probably be better
to update the set of proxyURLs dynamically whenever we fetch the new
state of the cluster; but it needs a bit more thinking to have this done
in a clean way with the proxy interface.
Example in Procfile works again.
In preperation for adding the ability to join a machine to an existing
cluster force the user to specify whether they expect this to me a new
cluster or an active one.
The error for not specifying the initial-cluster-state is:
```
etcd: initial cluster state unset and no wal found
```
This introduces two new concepts: the cluster and the member.
Members are logical etcd instances that have a name, raft ID, and a list
of peer and client addresses.
A cluster is made up of a list of members.
Using 0xBEEF is annoying in examples because it makes it makes it look
like the user can use ascii or something. In the Procfile use
0x0,0x1,0x2,etc and use 0xBAD0 in test.
Elton Vincent