When clients have no permission to perform whatever operation, then
the applying may fail. We should also move consistent_index forward
in this case, otherwise the consitent_index may smaller than the
snapshot index.
When a user sets up a Mirror with a restricted user that doesn't have
access to the `foo` path, we will fail to get the most recent revision
due to permissions issues.
With this change, when a prefix is provided we will get the initial
revision from the prefix rather than /foo. This allows restricted users
to setup sync.
When etcdserver receives a LeaseRenew request, it may be still in
progress of processing the LeaseGrantRequest on exact the same
leaseID. Accordingly it may return a TTL=0 to client due to the
leaseID not found error. So the leader should wait for the appliedID
to be available before processing client requests.
I think strong (not-equal) relationship was too restrictive when expressed with 1s granularity.
```
logger.go:130: 2022-04-03T22:15:15.242+0200 WARN m1 leader failed to send out heartbeat on time; took too long, leader is overloaded likely from slow disk {"member": "m1", "to": "cb785755eb80ac1", "heartbeat-interval": "10ms", "expected-duration": "20ms", "exceeded-duration": "24.666613ms"}
logger.go:130: 2022-04-03T22:15:15.262+0200 INFO m-1 published local member to cluster through raft {"member": "m-1", "local-member-id": "e2dd9f523aa7be87", "local-member-attributes": "{Name:m-1 ClientURLs:[unix://127.0.0.1:2196386040]}", "cluster-id": "b4b8e7e41c23c8b5", "publish-timeout": "5.2s"}
v3_lease_test.go:415: Expected lease ttl (4m58s) to be greather than (4m58s)
```
The code now ensures that each of the test is running in its own directory as opposed to shared os.tempdir.
```
$ (cd tests && env go test -timeout=15m --race go.etcd.io/etcd/tests/v3/integration/clientv3/examples -run ExampleAuth)
2022/04/03 10:24:59 Running tests (examples): ...
2022/04/03 10:24:59 the function can be called only in the test context. Was integration.BeforeTest() called ?
2022/04/03 10:24:59 2022-04-03T10:24:59.462+0200 INFO m0 LISTEN GRPC {"member": "m0", "grpcAddr": "localhost:m0", "m.Name": "m0"}
```
Nearly none of the tests was checking the value... just assuming WaitLeader success.
```
maintenance_test.go:277: Waiting for leader...
logger.go:130: 2022-04-03T08:01:09.914+0200 INFO m0 cluster version differs from storage version. {"member": "m0", "cluster-version": "3.6.0", "storage-version": "3.5.0"}
logger.go:130: 2022-04-03T08:01:09.915+0200 WARN m0 leader failed to send out heartbeat on time; took too long, leader is overloaded likely from slow disk {"member": "m0", "to": "2acc3d3b521981", "heartbeat-interval": "10ms", "expected-duration": "20ms", "exceeded-duration": "103.756219ms"}
logger.go:130: 2022-04-03T08:01:09.916+0200 INFO m0 updated storage version {"member": "m0", "new-storage-version": "3.6.0"}
...
logger.go:130: 2022-04-03T08:01:09.926+0200 INFO grpc [[roundrobin] roundrobinPicker: Build called with info: {map[0xc002630ac0:{{unix:localhost:m0 localhost <nil> 0 <nil>}} 0xc002630af0:{{unix:localhost:m1 localhost <nil> 0 <nil>}} 0xc002630b20:{{unix:localhost:m2 localhost <nil> 0 <nil>}}]}]
logger.go:130: 2022-04-03T08:01:09.926+0200 WARN m0 apply request took too long {"member": "m0", "took": "114.661766ms", "expected-duration": "100ms", "prefix": "", "request": "header:<ID:12658633312866157316 > cluster_version_set:<ver:\"3.6.0\" > ", "response": ""}
logger.go:130: 2022-04-03T08:01:09.927+0200 INFO m0 cluster version is updated {"member": "m0", "cluster-version": "3.6"}
logger.go:130: 2022-04-03T08:01:09.955+0200 INFO m2.raft 9f96af25a04e2ec3 [logterm: 2, index: 8, vote: 9903a56eaf96afac] ignored MsgVote from 2acc3d3b521981 [logterm: 2, index: 8] at term 2: lease is not expired (remaining ticks: 10) {"member": "m2"}
logger.go:130: 2022-04-03T08:01:09.955+0200 INFO m0.raft 9903a56eaf96afac [logterm: 2, index: 8, vote: 9903a56eaf96afac] ignored MsgVote from 2acc3d3b521981 [logterm: 2, index: 8] at term 2: lease is not expired (remaining ticks: 5) {"member": "m0"}
logger.go:130: 2022-04-03T08:01:09.955+0200 INFO m0.raft 9903a56eaf96afac [term: 2] received a MsgAppResp message with higher term from 2acc3d3b521981 [term: 3] {"member": "m0"}
logger.go:130: 2022-04-03T08:01:09.955+0200 INFO m0.raft 9903a56eaf96afac became follower at term 3 {"member": "m0"}
logger.go:130: 2022-04-03T08:01:09.955+0200 INFO m0.raft raft.node: 9903a56eaf96afac lost leader 9903a56eaf96afac at term 3 {"member": "m0"}
maintenance_test.go:279: Leader established.
```
Tmp
TestMutexTryLock(SingleNode|MultiNode) were being skipped as they had duplicate calls to integration2.BeginTest. These duplicate calls registered a second handler for leak detection which failed and skipped the test as the wrappers had already started a cluster.
part of #13698
This test was being skipped as it has a duplicate call to
integration2.BeginTest. This duplicate call registered a second handler
for leak detection which failed and skipped the test as the wrapper
(runWatchTest) has already started a cluster.
The directory created by `T.TempDir()` and is automatically removed when
the test and all its subtests complete.
Reference: https://pkg.go.dev/testing#T.TempDir
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
