mirror of
https://github.com/k3s-io/kubernetes.git
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104 lines
3.4 KiB
Go
104 lines
3.4 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package executorinfo
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import (
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"bytes"
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"fmt"
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"hash/crc64"
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"sort"
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"strconv"
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"github.com/gogo/protobuf/proto"
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"github.com/mesos/mesos-go/mesosproto"
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mesos "github.com/mesos/mesos-go/mesosproto"
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execcfg "k8s.io/kubernetes/contrib/mesos/pkg/executor/config"
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)
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func NewID(info *mesosproto.ExecutorInfo) *mesosproto.ExecutorID {
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eid := fmt.Sprintf("%x_%s", hash(info), execcfg.DefaultInfoID)
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return &mesosproto.ExecutorID{Value: proto.String(eid)}
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}
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// compute a hashcode for ExecutorInfo that may be used as a reasonable litmus test
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// with respect to compatibility across HA schedulers. the intent is that an HA scheduler
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// should fail-fast if it doesn't pass this test, rather than generating (potentially many)
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// errors at run-time because a Mesos master decides that the ExecutorInfo generated by a
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// secondary scheduler doesn't match that of the primary scheduler.
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//
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// Note: We intentionally leave out the Resources in this hash because they are
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// set during procurement and should not lead to a different ExecutorId.
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// This also means that the Resources do not contribute to offer
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// compatibility checking. But as we persist and restore the Resources
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// through node anotation we make sure that the right resources are chosen
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// during task launch.
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//
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// see https://github.com/apache/mesos/blob/0.22.0/src/common/type_utils.cpp#L110
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func hash(info *mesos.ExecutorInfo) uint64 {
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// !!! we specifically do NOT include:
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// - Framework ID because it's a value that's initialized too late for us to use
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// - Executor ID because it's a value that includes a copy of this hash
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buf := &bytes.Buffer{}
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buf.WriteString(info.GetName())
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buf.WriteString(info.GetSource())
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buf.Write(info.Data)
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if info.Command != nil {
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buf.WriteString(info.Command.GetValue())
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buf.WriteString(info.Command.GetUser())
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buf.WriteString(strconv.FormatBool(info.Command.GetShell()))
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if sz := len(info.Command.Arguments); sz > 0 {
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x := make([]string, sz)
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copy(x, info.Command.Arguments)
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sort.Strings(x)
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for _, item := range x {
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buf.WriteString(item)
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}
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}
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if vars := info.Command.Environment.GetVariables(); len(vars) > 0 {
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names := []string{}
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e := make(map[string]string)
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for _, v := range vars {
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if name := v.GetName(); name != "" {
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names = append(names, name)
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e[name] = v.GetValue()
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}
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}
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sort.Strings(names)
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for _, n := range names {
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buf.WriteString(n)
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buf.WriteString("=")
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buf.WriteString(e[n])
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}
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}
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if uris := info.Command.GetUris(); len(uris) > 0 {
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su := []string{}
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for _, uri := range uris {
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su = append(su, fmt.Sprintf("%s%t%t", uri.GetValue(), uri.GetExecutable(), uri.GetExtract()))
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}
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sort.Strings(su)
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for _, uri := range su {
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buf.WriteString(uri)
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}
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}
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//TODO(jdef) add support for Container
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}
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table := crc64.MakeTable(crc64.ECMA)
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return crc64.Checksum(buf.Bytes(), table)
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}
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