This method uses raft status exposed at /debug/varz to determine the
health of the cluster. It uses whether commit index increases to
determine the cluster health, and uses whether match index increases to
determine the member health.
This could fix the bug #2711 that fails to detect follower is unhealthy
because it doesn't rely on whether message in long-polling connection is sent.
This health check is stricter than the old one, and reflects the
situation that whether followers are healthy in the view of the leader. One
example is that if the follower is receiving the snapshot, it will turns
out to be unhealthy because it doesn't move forward.
`etcdctl cluster-health` will reflect the healthy view in the raft level,
while connectivity checks reflects the healthy view in transport level.
The previous flag parsing has a small issue. It uses
`recursive == true` and `after-index == 0` to determine
if user specifies the sub flags. This is incorrect since
user can specify `after-index = 0`. Then the flag parsing
would be confused.
This commit explicitly find the `--` in the remaining args
and determine the key and cmdArgs accordingly.
Change its default value from `127.0.0.1:4001,127.0.0.1:2379` to
`http://127.0.0.1:4001,http://127.0.0.1:2379`
Adding HTTP schema makes its format consistent with etcd's xxx-urls
flags.
Backup process should be able to read all WALs until io.EOF to
generate a point-in-time backup.
Our WAL file is append-only. And the backup process will lock all
files before start reading, which can prevent the gc routine from
removing any files in the middle.
add godep for speakeasy and auth entry parsing
add security_user to client
add role to client
add role commands
add auth support to etcdclient and etcdctl(member/user)
add enable/disable to etcdctl
better error messages, read/write/readwrite
Bump go-etcd to include codec changes, add new dependency
verify the error for revoke/add if nothing changed, remove security-merging prefix
When failing to get leader stats, it said 'cluster is unhealthy' before.
This is confusing when it cannot get stats because advertised client urls
are set wrong and the cluster is healthy.
