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extract leadership package in its own repository and update Godeps 

Signed-off-by: Alexandre Beslic <alexandre.beslic@gmail.com>
This commit is contained in:
Alexandre Beslic 2016-02-08 16:55:32 -08:00
parent 31a3b07b08
commit 3f7a035855
10 changed files with 283 additions and 122 deletions
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4
Godeps/Godeps.json generated
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@ -86,6 +86,10 @@
"Comment": "v0.1.0-21-g0bbddae",
"Rev": "0bbddae09c5a5419a8c6dcdd7ff90da3d450393b"
},
{
"ImportPath": "github.com/docker/leadership",
"Rev": "b545f2df5f5cd35a54c5a6bf154dcfe1f29d125b"
},
{
"ImportPath": "github.com/docker/libkv",
"Comment": "v0.1.0-6-g2f2380c",

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Godeps/_workspace/src/github.com/docker/leadership/CONTRIBUTING.md generated vendored Normal file
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@ -0,0 +1,55 @@
# Contributing to Docker
### Sign your work
The sign-off is a simple line at the end of the explanation for the patch. Your
signature certifies that you wrote the patch or otherwise have the right to pass
it on as an open-source patch. The rules are pretty simple: if you can certify
the below (from [developercertificate.org](http://developercertificate.org/)):
```
Developer Certificate of Origin
Version 1.1
Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
660 York Street, Suite 102,
San Francisco, CA 94110 USA
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
```
Then you just add a line to every git commit message:
Signed-off-by: Joe Smith <joe.smith@email.com>
Use your real name (sorry, no pseudonyms or anonymous contributions.)
If you set your `user.name` and `user.email` git configs, you can sign your
commit automatically with `git commit -s`.

191
Godeps/_workspace/src/github.com/docker/leadership/LICENSE generated vendored Normal file
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@ -0,0 +1,191 @@
Apache License
Version 2.0, January 2004
https://www.apache.org/licenses/
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7. Disclaimer of Warranty. Unless required by applicable law or
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8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
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Copyright 2015 Docker, Inc.
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you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

27
Godeps/_workspace/src/github.com/docker/leadership/MAINTAINERS generated vendored Normal file
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@ -0,0 +1,27 @@
# leadership maintainers file
#
# This file describes who runs the docker/leadership project and how.
# This is a living document - if you see something out of date or missing, speak up!
#
# It is structured to be consumable by both humans and programs.
# To extract its contents programmatically, use any TOML-compliant parser.
#
# This file is compiled into the MAINTAINERS file in docker/opensource.
#
[Org]
[Org."Core maintainers"]
people = [
"abronan",
]
[people]
# A reference list of all people associated with the project.
# All other sections should refer to people by their canonical key
# in the people section.
# ADD YOURSELF HERE IN ALPHABETICAL ORDER
[people.abronan]
Name = "Alexandre Beslic"
Email = "alexandre.beslic@gmail.com"
GitHub = "abronan"

6
leadership/README.md → Godeps/_workspace/src/github.com/docker/leadership/README.md generated vendored
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@ -3,7 +3,7 @@
Leadership is a library for a cluster leader election on top of a distributed
Key/Value store.
It's built using Swarm's `pkg/store` and is designed to work across multiple
It is built using the `docker/libkv` library and is designed to work across multiple
storage backends.
You can use `leadership` with `Consul`, `etcd` and `Zookeeper`.
@ -108,3 +108,7 @@ func run(candidate *leadership.Candidate) {
}
}
```
## License
leadership is licensed under the Apache License, Version 2.0. See [LICENSE](LICENSE) for the full license text.

0
leadership/candidate.go → Godeps/_workspace/src/github.com/docker/leadership/candidate.go generated vendored
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0
leadership/follower.go → Godeps/_workspace/src/github.com/docker/leadership/follower.go generated vendored
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2
cli/manage.go
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@ -13,12 +13,12 @@ import (
"github.com/codegangsta/cli"
"github.com/docker/docker/pkg/discovery"
kvdiscovery "github.com/docker/docker/pkg/discovery/kv"
"github.com/docker/leadership"
"github.com/docker/swarm/api"
"github.com/docker/swarm/cluster"
"github.com/docker/swarm/cluster/mesos"
"github.com/docker/swarm/cluster/swarm"
"github.com/docker/swarm/experimental"
"github.com/docker/swarm/leadership"
"github.com/docker/swarm/scheduler"
"github.com/docker/swarm/scheduler/filter"
"github.com/docker/swarm/scheduler/strategy"

65
leadership/candidate_test.go
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@ -1,65 +0,0 @@
package leadership
import (
"testing"
"time"
libkvmock "github.com/docker/libkv/store/mock"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
)
func TestCandidate(t *testing.T) {
kv, err := libkvmock.New([]string{}, nil)
assert.NoError(t, err)
assert.NotNil(t, kv)
mockStore := kv.(*libkvmock.Mock)
mockLock := &libkvmock.Lock{}
mockStore.On("NewLock", "test_key", mock.Anything).Return(mockLock, nil)
// Lock and unlock always succeeds.
lostCh := make(chan struct{})
var mockLostCh <-chan struct{} = lostCh
mockLock.On("Lock", mock.Anything).Return(mockLostCh, nil)
mockLock.On("Unlock").Return(nil)
candidate := NewCandidate(kv, "test_key", "test_node", 0)
electedCh, _, err := candidate.RunForElection()
assert.Nil(t, err)
// Should issue a false upon start, no matter what.
assert.False(t, <-electedCh)
// Since the lock always succeeeds, we should get elected.
assert.True(t, <-electedCh)
assert.True(t, candidate.IsLeader())
// Signaling a lost lock should get us de-elected...
close(lostCh)
assert.False(t, <-electedCh)
// And we should attempt to get re-elected again.
assert.True(t, <-electedCh)
// When we resign, unlock will get called, we'll be notified of the
// de-election and we'll try to get the lock again.
go candidate.Resign()
assert.False(t, <-electedCh)
assert.True(t, <-electedCh)
candidate.Stop()
// Ensure that the chan closes after some time
for {
select {
case _, open := <-electedCh:
if !open {
mockStore.AssertExpectations(t)
return
}
case <-time.After(1 * time.Second):
t.Fatalf("electedCh not closed correctly")
}
}
}

55
leadership/follower_test.go
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@ -1,55 +0,0 @@
package leadership
import (
"testing"
"github.com/docker/libkv/store"
libkvmock "github.com/docker/libkv/store/mock"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
)
func TestFollower(t *testing.T) {
kv, err := libkvmock.New([]string{}, nil)
assert.NoError(t, err)
assert.NotNil(t, kv)
mockStore := kv.(*libkvmock.Mock)
kvCh := make(chan *store.KVPair)
var mockKVCh <-chan *store.KVPair = kvCh
mockStore.On("Watch", "test_key", mock.Anything).Return(mockKVCh, nil)
follower := NewFollower(kv, "test_key")
leaderCh, errCh, err := follower.FollowElection()
assert.Nil(t, err)
// Simulate leader updates
go func() {
kvCh <- &store.KVPair{Key: "test_key", Value: []byte("leader1")}
kvCh <- &store.KVPair{Key: "test_key", Value: []byte("leader1")}
kvCh <- &store.KVPair{Key: "test_key", Value: []byte("leader2")}
kvCh <- &store.KVPair{Key: "test_key", Value: []byte("leader1")}
}()
// We shouldn't see duplicate events.
assert.Equal(t, <-leaderCh, "leader1")
assert.Equal(t, <-leaderCh, "leader2")
assert.Equal(t, <-leaderCh, "leader1")
assert.Equal(t, follower.Leader(), "leader1")
// Once stopped, iteration over the leader channel should stop.
follower.Stop()
close(kvCh)
// Assert that we receive an error from the error chan to deal with the failover
err, open := <-errCh
assert.True(t, open)
assert.NotNil(t, err)
// Ensure that the chan is closed
_, open = <-leaderCh
assert.False(t, open)
mockStore.AssertExpectations(t)
}