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tools: added a tool to check whether it is safe to upgrade to v3.0.3
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright 2017-2019 Lei Ni ([email protected]) and other Dragonboat authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // 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. | ||
|
|
||
| package upgrade310 | ||
|
|
||
| import ( | ||
| "math" | ||
|
|
||
| "github.com/lni/dragonboat/v3/config" | ||
| "github.com/lni/dragonboat/v3/internal/logdb" | ||
| "github.com/lni/dragonboat/v3/internal/rsm" | ||
| "github.com/lni/dragonboat/v3/internal/server" | ||
| pb "github.com/lni/dragonboat/v3/raftpb" | ||
| ) | ||
|
|
||
| // CanUpgradeToV310 determines whether your production dataset is safe to use | ||
| // the v3.0.3 or higher version of Dragonboat. You need to stop your NodeHost | ||
| // before invoking CanUpgradeToV310. | ||
| // | ||
| // CanUpgradeToV310 checks whether there is any snapshot that has already been | ||
| // streamed or imported but has not been fully applied into user state machine | ||
| // yet. | ||
| // | ||
| // The input parameter nhConfig should be the same NodeHostConfig instance you | ||
| // use to initiate your NodeHost object. CanUpgradeToV310 returns a boolean flag | ||
| // indicating whether it is safe to upgrade. If it returns false, you can | ||
| // restart your NodeHost using the existing version of Dragonboat, e.g. v3.0.2, | ||
| // to allow pending snapshots to be fully applied. Repeat the above steps until | ||
| // CanUpgradeToV310 returns true. | ||
| // | ||
| // Note that for the vast majority cases, CanUpgradeToV310 is expected to | ||
| // return true after its first run, which means it is safe to go ahead and | ||
| // upgrade the Dragonboat version. | ||
| func CanUpgradeToV310(nhConfig config.NodeHostConfig) (bool, error) { | ||
| if nhConfig.DeploymentID == 0 { | ||
| nhConfig.DeploymentID = 1 | ||
| } | ||
| serverCtx, err := server.NewContext(nhConfig) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| defer serverCtx.Stop() | ||
| if err := serverCtx.LockNodeHostDir(); err != nil { | ||
| return false, err | ||
| } | ||
| nhDir, walDir := serverCtx.GetLogDBDirs(nhConfig.DeploymentID) | ||
| logdb, err := logdb.NewDefaultLogDB(nhDir, walDir) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| defer logdb.Close() | ||
| niList, err := logdb.ListNodeInfo() | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| for _, ni := range niList { | ||
| ssList, err := logdb.ListSnapshots(ni.ClusterID, ni.NodeID, math.MaxUint64) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| for _, ss := range ssList { | ||
| if ss.Type == pb.OnDiskStateMachine && ss.OnDiskIndex == 0 { | ||
| shrunk, err := rsm.IsShrinkedSnapshotFile(ss.Filepath) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| if !shrunk { | ||
| return false, nil | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return true, nil | ||
| } |