This helps the test to pass safely in semaphore CI.
Based on my manual testing, it may take at most 500ms to return
error in semaphore CI, so I set 1s as a safe value.
We use url.ParseQuery to parse names-to-urls string, but it has side
effect that unescape the string. If the initial-cluster string has ipv6
which contains `%25`, it will unescape it to `%` and make further url
parse failed.
Fix it by modifiying the parse process.
Go1.4 doesn't support literal IPv6 address w/ zone in
URI(https://github.com/golang/go/issues/6530), so we only enable tests
in Go1.5+.
After enabling v3 demo, it may change the underlying data organization
for v3 store. So we forbid to unset --experimental-v3demo once it has
been used.
"X-Content-Type-Options" was being autoadded, but none of the
test maps took it into account. I saw that "Content-Type" was
also being deleted, so I figured that was the best solution
for this as well.
It is good to print it in debug output:
```
21:56:12 etcd1 | 2015-08-25 21:56:12.162406 I | etcdmain: peerTLS: cert
= certs/etcd1.pem, key = certs/etcd1-key.pem, ca = , trusted-ca =
certs/ca.pem, client-cert-auth = true
```
This problem is totally fixed at 1.5.
go1.5 adds a Request.Cancel channel, which allows for "race free"
cancellation
(8b4278ffb7).
Our implementation relies on it to always cancel in-flight request.
This solves the problem that etcd may fatal because its critical path
cannot get file descriptor resource when the number of clients is too
big. The PR lets the client listener close client connections
immediately after they are accepted when
the file descriptor usage in the process reaches some pre-set limit, so
it ensures that the internal critical path could always get file
descriptor when it needs.
When there are tons to clients connecting to the server, the original
behavior is like this:
```
2015/08/4 16:42:08 etcdserver: cannot monitor file descriptor usage
(open /proc/self/fd: too many open files)
2015/08/4 16:42:33 etcdserver: failed to purge snap file open
default2.etcd/member/snap: too many open files
[halted]
```
Current behavior is like this:
```
2015/08/6 19:05:25 transport: accept error: closing connection,
exceed file descriptor usage limitation (fd limit=874)
2015/08/6 19:05:25 transport: accept error: closing connection,
exceed file descriptor usage limitation (fd limit=874)
2015/08/6 19:05:26 transport: accept error: closing connection,
exceed file descriptor usage limitation (fd limit=874)
2015/08/6 19:05:27 transport: accept error: closing connection,
exceed file descriptor usage limitation (fd limit=874)
2015/08/6 19:05:28 transport: accept error: closing connection,
exceed file descriptor usage limitation (fd limit=874)
2015/08/6 19:05:28 etcdserver: 80% of the file descriptor limit is
used [used = 873, limit = 1024]
```
It is available at linux system today because pkg/runtime only has linux
support.
If TLS config is empty, etcd downgrades keepalive listener from HTTPS to
HTTP without warning. This results in HTTPS downgrade bug for client urls.
The commit returns error if it cannot listen on TLS.
Waiting 3ms is not long enough for schedule to work well. The test suite
may fail once per 200 times in travis due to this. Extend this to 10ms
to ensure schedule could work. Now it could run 1000 times successfully
in travis.
It is possible to trigger the time.After case if the timer went off
between time.After setting the timer for its channel and the time that
select looked at the channel. So it needs to be longer.
refer: https://groups.google.com/forum/#!topic/golang-nuts/1tjcV80ccq8
multiple cpu running may be slower than single cpu running, so it may
take longer time to remove files.
Increase from 5ms to 20ms to give it enough time.
