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placement.go
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placement.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package integration
import (
"math"
"github.com/m3db/m3/src/cluster/kv"
"github.com/m3db/m3/src/cluster/placement"
"github.com/m3db/m3/src/cluster/shard"
)
type placementInstanceConfig struct {
instanceID string
shardSetID uint32
shardStartInclusive uint32
shardEndExclusive uint32
}
func (c *placementInstanceConfig) newPlacementInstance() placement.Instance {
numShards := c.shardEndExclusive - c.shardStartInclusive
shardSet := make([]shard.Shard, 0, numShards)
for shardID := c.shardStartInclusive; shardID < c.shardEndExclusive; shardID++ {
shard := shard.NewShard(shardID).
SetState(shard.Available).
SetCutoverNanos(0).
SetCutoffNanos(math.MaxInt64)
shardSet = append(shardSet, shard)
}
shards := shard.NewShards(shardSet)
return placement.NewInstance().
SetID(c.instanceID).
SetShards(shards).
SetShardSetID(c.shardSetID).
SetEndpoint(c.instanceID)
}
func newPlacement(numShards int, instances []placement.Instance) placement.Placement {
shards := make([]uint32, numShards)
for i := 0; i < numShards; i++ {
shards[i] = uint32(i)
}
return placement.NewPlacement().
SetInstances(instances).
SetShards(shards)
}
func setPlacement(
key string,
store kv.Store,
pl placement.Placement,
) error {
stagedPlacement := placement.NewStagedPlacement().
SetPlacements([]placement.Placement{pl})
stagedPlacementProto, err := stagedPlacement.Proto()
if err != nil {
return err
}
_, err = store.SetIfNotExists(key, stagedPlacementProto)
return err
}