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executor: support 'SET CONFIG' syntax to change configs of TiKV/PD in…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| // Copyright 2020 PingCAP, Inc. | ||
| // | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package executor | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net" | ||
| "net/http" | ||
| "strings" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/parser/mysql" | ||
| "github.com/pingcap/tidb/infoschema" | ||
| "github.com/pingcap/tidb/planner/core" | ||
| "github.com/pingcap/tidb/privilege" | ||
| "github.com/pingcap/tidb/sessionctx" | ||
| "github.com/pingcap/tidb/util" | ||
| "github.com/pingcap/tidb/util/chunk" | ||
| "github.com/pingcap/tidb/util/pdapi" | ||
| "github.com/pingcap/tidb/util/set" | ||
| "github.com/pingcap/tidb/util/stringutil" | ||
| ) | ||
|
|
||
| // SetConfigExec executes 'SET CONFIG' statement. | ||
| type SetConfigExec struct { | ||
| baseExecutor | ||
| p *core.SetConfig | ||
| v string | ||
| } | ||
|
|
||
| // Open implements the Executor Open interface. | ||
| func (s *SetConfigExec) Open(ctx context.Context) error { | ||
| // TODO: create a new privilege for this operation instead of using the SuperPriv | ||
| checker := privilege.GetPrivilegeManager(s.ctx) | ||
| if checker != nil && !checker.RequestVerification(s.ctx.GetSessionVars().ActiveRoles, "", "", "", mysql.SuperPriv) { | ||
| return core.ErrSpecificAccessDenied.GenWithStackByArgs("SET CONFIG") | ||
| } | ||
|
|
||
| if s.p.Type != "" { | ||
| s.p.Type = strings.ToLower(s.p.Type) | ||
| if s.p.Type != "tikv" && s.p.Type != "tidb" && s.p.Type != "pd" { | ||
| return errors.Errorf("unknown type %v", s.p.Type) | ||
| } | ||
| if s.p.Type == "tidb" { | ||
| return errors.Errorf("TiDB doesn't support to change configs online, please use SQL variables") | ||
| } | ||
| } | ||
| if s.p.Instance != "" { | ||
| s.p.Instance = strings.ToLower(s.p.Instance) | ||
| if !isValidInstance(s.p.Instance) { | ||
| return errors.Errorf("invalid instance %v", s.p.Instance) | ||
| } | ||
| } | ||
| s.p.Name = strings.ToLower(s.p.Name) | ||
|
|
||
| val, isNull, err := s.p.Value.EvalString(s.ctx, chunk.Row{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if isNull { | ||
| return errors.Errorf("can't set config to null") | ||
| } | ||
| s.v = val | ||
| return nil | ||
| } | ||
|
|
||
| // TestSetConfigServerInfoKey is used as the key to store 'TestSetConfigServerInfoFunc' in the context. | ||
| var TestSetConfigServerInfoKey stringutil.StringerStr = "TestSetConfigServerInfoKey" | ||
|
|
||
| // TestSetConfigHTTPHandlerKey is used as the key to store 'TestSetConfigDoRequestFunc' in the context. | ||
| var TestSetConfigHTTPHandlerKey stringutil.StringerStr = "TestSetConfigHTTPHandlerKey" | ||
|
|
||
| // Next implements the Executor Next interface. | ||
| func (s *SetConfigExec) Next(ctx context.Context, req *chunk.Chunk) error { | ||
| req.Reset() | ||
| getServerFunc := infoschema.GetClusterServerInfo | ||
| if v := s.ctx.Value(TestSetConfigServerInfoKey); v != nil { | ||
| getServerFunc = v.(func(sessionctx.Context) ([]infoschema.ServerInfo, error)) | ||
| } | ||
|
|
||
| serversInfo, err := getServerFunc(s.ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| nodeTypes := set.NewStringSet() | ||
| nodeAddrs := set.NewStringSet() | ||
| if s.p.Type != "" { | ||
| nodeTypes.Insert(s.p.Type) | ||
| } | ||
| if s.p.Instance != "" { | ||
| nodeAddrs.Insert(s.p.Instance) | ||
| } | ||
| serversInfo = filterClusterServerInfo(serversInfo, nodeTypes, nodeAddrs) | ||
|
|
||
| for _, serverInfo := range serversInfo { | ||
| var url string | ||
| switch serverInfo.ServerType { | ||
| case "pd": | ||
| url = fmt.Sprintf("%s://%s%s", util.InternalHTTPSchema(), serverInfo.StatusAddr, pdapi.Config) | ||
| case "tikv": | ||
| url = fmt.Sprintf("%s://%s/config", util.InternalHTTPSchema(), serverInfo.StatusAddr) | ||
| default: | ||
| continue | ||
| } | ||
| if err := s.doRequest(url); err != nil { | ||
| s.ctx.GetSessionVars().StmtCtx.AppendWarning(err) | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (s *SetConfigExec) doRequest(url string) (retErr error) { | ||
| body := bytes.NewBufferString(fmt.Sprintf(`{"%s":"%s"}`, s.p.Name, s.v)) | ||
| req, err := http.NewRequest(http.MethodPost, url, body) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| var httpHandler func(req *http.Request) (*http.Response, error) | ||
| if v := s.ctx.Value(TestSetConfigHTTPHandlerKey); v != nil { | ||
| httpHandler = v.(func(*http.Request) (*http.Response, error)) | ||
| } else { | ||
| httpHandler = util.InternalHTTPClient().Do | ||
| } | ||
| resp, err := httpHandler(req) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer func() { | ||
| if err := resp.Body.Close(); err != nil { | ||
| if retErr == nil { | ||
| retErr = err | ||
| } | ||
| } | ||
| }() | ||
| if resp.StatusCode == http.StatusOK { | ||
| return nil | ||
| } else if resp.StatusCode >= 400 && resp.StatusCode < 600 { | ||
| message, err := ioutil.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return errors.Errorf("bad request to %s: %s", url, message) | ||
| } | ||
| return errors.Errorf("request %s failed: %s", url, resp.Status) | ||
| } | ||
|
|
||
| func isValidInstance(instance string) bool { | ||
| ip, port, err := net.SplitHostPort(instance) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| if port == "" { | ||
| return false | ||
| } | ||
| v := net.ParseIP(ip) | ||
| return v != nil | ||
| } |
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