/
initcontainer.go
131 lines (118 loc) · 3.96 KB
/
initcontainer.go
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// Copyright 2021 The Kubeflow 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 slurm_schema
import (
"bytes"
"fmt"
kubeclusterorgv1alpha1 "github.com/chriskery/kubecluster/apis/kubecluster.org/v1alpha1"
"github.com/chriskery/kubecluster/pkg/common"
"html/template"
"os"
"strconv"
"strings"
"sync"
corev1 "k8s.io/api/core/v1"
"sigs.k8s.io/yaml"
)
var (
initContainerTemplate = `
- name: init-slurm
image: {{.InitContainerImage}}
imagePullPolicy: IfNotPresent
resources:
limits:
cpu: 100m
memory: 20Mi
requests:
cpu: 50m
memory: 10Mi
command: ['sh', '-c', 'err=1;for i in $(seq {{.MaxTries}}); do if nslookup {{.MasterAddr}}; then err=0 && break; fi;echo waiting for master; sleep 2; done; exit $err']`
onceInitContainer sync.Once
icGenerator *initContainerGenerator
)
type initContainerGenerator struct {
template string
image string
maxTries int
}
func getInitContainerGenerator() *initContainerGenerator {
onceInitContainer.Do(func() {
icGenerator = &initContainerGenerator{
template: getInitContainerTemplateOrDefault(config.slurmSchemaInitContainerTemplateFile),
image: config.slurmSchemaInitContainerImage,
maxTries: config.slurmSchemaInitContainerMaxTries,
}
})
return icGenerator
}
func (i *initContainerGenerator) GetInitContainer(masterAddr string) ([]corev1.Container, error) {
var buf bytes.Buffer
tpl, err := template.New("container").Parse(i.template)
if err != nil {
return nil, err
}
if err := tpl.Execute(&buf, struct {
MasterAddr string
InitContainerImage string
MaxTries int
}{
MasterAddr: masterAddr,
InitContainerImage: i.image,
MaxTries: i.maxTries,
}); err != nil {
return nil, err
}
var result []corev1.Container
err = yaml.Unmarshal(buf.Bytes(), &result)
if err != nil {
return nil, err
}
//should only supply one image
if len(result) > 1 {
result = result[0:1]
}
return result, nil
}
// getInitContainerTemplateOrDefault returns the init container template file if
// it exists, or return initContainerTemplate by default.
func getInitContainerTemplateOrDefault(file string) string {
b, err := os.ReadFile(file)
if err == nil {
return string(b)
}
return initContainerTemplate
}
func setInitContainer(
kcluster *kubeclusterorgv1alpha1.KubeCluster,
podTemplate *corev1.PodTemplateSpec,
rtype kubeclusterorgv1alpha1.ReplicaType,
) error {
g := getInitContainerGenerator()
controllerAddress := common.GenGeneralName(kcluster.Name, SchemaReplicaTypeController, strconv.Itoa(0))
initContainers, err := g.GetInitContainer(controllerAddress)
if err != nil {
return err
}
waitReadyCommand := fmt.Sprintf("while [ \"$(cat %s)\" != \"%s\" ]; do echo \"slurm.conf not ready\"; sleep 5; done && echo \"slurm.conf ready\"",
configMapReadyFile, configMapReady)
cpSlurmCmdCommand := fmt.Sprintf("if [ -d %s ] && [ -d %s ];then cp -r %s/* %s;fi", SlurmCmdDir, EmptyVolumeMountPathInInitContainer, SlurmCmdDir, EmptyVolumeMountPathInInitContainer)
if rtype == SchemaReplicaTypeController {
initContainers[0].Command = []string{"sh", "-c", strings.Join([]string{waitReadyCommand, cpSlurmCmdCommand}, " && ")}
} else {
initContainers[0].Command = []string{"sh", "-c", strings.Join([]string{waitReadyCommand, cpSlurmCmdCommand, strings.Join(initContainers[0].Command, " ")}, " && ")}
}
//we only need to change tha last
podTemplate.Spec.InitContainers = append(podTemplate.Spec.InitContainers, initContainers...)
return nil
}