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systemd engine can create virtualization
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package systemd | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| log "github.com/sirupsen/logrus" | ||
|
|
||
| enginetypes "github.com/projecteru2/core/engine/types" | ||
| ) | ||
|
|
||
| const ( | ||
| unitTemplate = ` | ||
| [Unit] | ||
| %s | ||
| [Service] | ||
| %s | ||
| ` | ||
| ) | ||
|
|
||
| type unitBuilder struct { | ||
| opts *enginetypes.VirtualizationCreateOptions | ||
| unitBuffer []string | ||
| serviceBuffer []string | ||
| err error | ||
| } | ||
|
|
||
| type unitDesciption struct { | ||
| Name string | ||
| Labels map[string]string | ||
| } | ||
|
|
||
| func (s *SystemdSSH) newUnitBuilder(opts *enginetypes.VirtualizationCreateOptions) *unitBuilder { | ||
| return &unitBuilder{ | ||
| opts: opts, | ||
| } | ||
| } | ||
|
|
||
| func (b *unitBuilder) buildUnit() *unitBuilder { | ||
| if b.err != nil { | ||
| return b | ||
| } | ||
|
|
||
| description, err := json.Marshal(unitDesciption{Name: b.opts.Name, Labels: b.opts.Labels}) | ||
| if err != nil { | ||
| b.err = err | ||
| return b | ||
| } | ||
|
|
||
| b.unitBuffer = append(b.unitBuffer, []string{ | ||
| fmt.Sprintf("Description=%s", string(description)), | ||
| "After=network-online.target firewalld.service", | ||
| "Wants=network-online.target", | ||
| }...) | ||
| return b | ||
| } | ||
|
|
||
| func (b *unitBuilder) buildResource(CPUAmount int) *unitBuilder { | ||
| if b.err != nil { | ||
| return b | ||
| } | ||
|
|
||
| allowedCPUs := []string{} | ||
| for CPU, _ := range b.opts.CPU { | ||
| allowedCPUs = append(allowedCPUs, CPU) | ||
| } | ||
|
|
||
| CPUQuotaPercentage := b.opts.Quota / float64(CPUAmount) * 100 | ||
|
|
||
| b.serviceBuffer = append(b.serviceBuffer, []string{ | ||
| fmt.Sprintf("ExecStartPre=/usr/bin/cgcreate -g memory,cpuset:%s", b.opts.Name), | ||
| fmt.Sprintf("ExecStartPre=/usr/bin/cgset -r cpuset.cpus=%s %s", strings.Join(allowedCPUs, ","), b.opts.Name), | ||
| fmt.Sprintf("ExecStartPre=/usr/bin/cgset -r cpuset.mems=0 %s", b.opts.Name), | ||
| fmt.Sprintf("ExecStartPre=/usr/bin/cgset -r memory.limit_in_bytes=%d %s", b.opts.Memory, b.opts.Name), | ||
| fmt.Sprintf("CPUQuota=%.2f%%", CPUQuotaPercentage), | ||
| }...) | ||
| return b | ||
| } | ||
|
|
||
| func (b *unitBuilder) buildExec() *unitBuilder { | ||
| if b.err != nil { | ||
| return b | ||
| } | ||
|
|
||
| stdioType, err := b.convertToSystemdStdio(b.opts.LogType) | ||
| if err != nil { | ||
| b.err = err | ||
| return b | ||
| } | ||
|
|
||
| restartPolicy, err := b.convertToSystemdRestartPolicy(b.opts.RestartPolicy) | ||
| if err != nil { | ||
| b.err = err | ||
| return b | ||
| } | ||
|
|
||
| b.serviceBuffer = append(b.serviceBuffer, []string{ | ||
| fmt.Sprintf("ExecStart=/usr/bin/cgexec -g memory,cpuset:%s %s", b.opts.Name, strings.Join(b.opts.Cmd, " ")), | ||
| fmt.Sprintf("StandardOutput=%s", stdioType), | ||
| fmt.Sprintf("StandardError=%s", stdioType), | ||
| fmt.Sprintf("Restart=%s", restartPolicy), | ||
| }...) | ||
| return b | ||
| } | ||
|
|
||
| func (b *unitBuilder) buffer() (*bytes.Buffer, error) { | ||
| unit := fmt.Sprintf(unitTemplate, | ||
| strings.Join(b.unitBuffer, "\n"), | ||
| strings.Join(b.serviceBuffer, "\n"), | ||
| ) | ||
| log.Debugf("%s", unit) | ||
| return bytes.NewBufferString(unit), b.err | ||
| } | ||
|
|
||
| func (b *unitBuilder) convertToSystemdRestartPolicy(restart string) (policy string, err error) { | ||
| switch { | ||
| case restart == "no": | ||
| policy = "no" | ||
| case restart == "always" || restart == "": | ||
| policy = "always" | ||
| case strings.HasPrefix(restart, "on-failure"): | ||
| policy = "on-failure" | ||
| default: | ||
| err = fmt.Errorf("restart policy not supported: %s", restart) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (b *unitBuilder) convertToSystemdStdio(logType string) (stdioType string, err error) { | ||
| switch logType { | ||
| case "journald", "": | ||
| stdioType = "journal" | ||
| case "none": | ||
| stdioType = "null" | ||
| default: | ||
| err = fmt.Errorf("log type not supported: %s", logType) | ||
| } | ||
| return | ||
| } |
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