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https://code.dumpstack.io/tools/appvm.git
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Implements automatic ballooning
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parent
1184fa3d7e
commit
2dae4eb5a3
11
README.md
11
README.md
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@ -66,6 +66,17 @@ Default hotkey to release cursor: ctrl+alt.
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$ appvm stop chromium
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## Automatic ballooning
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Add this command:
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$ appvm autoballoon
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to crontab like that:
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$ crontab -l
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* * * * * /home/user/dev/go/bin/appvm autoballoon
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# App description
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$ cat nix/chromium.nix
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59
appvm.go
59
appvm.go
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@ -16,11 +16,13 @@ import (
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"os"
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"os/exec"
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"path/filepath"
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"strconv"
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"syscall"
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"time"
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"github.com/digitalocean/go-libvirt"
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"github.com/jollheef/go-system"
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"github.com/olekukonko/tablewriter"
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kingpin "gopkg.in/alecthomas/kingpin.v2"
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)
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@ -239,6 +241,60 @@ func drop(name string) {
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os.RemoveAll(appDataPath)
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}
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func autoBalloon(l *libvirt.Libvirt) {
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domains, err := l.Domains()
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if err != nil {
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log.Fatal(err)
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}
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const memoryMin = 512 * 1024 // 512 MiB
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table := tablewriter.NewWriter(os.Stdout)
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table.SetHeader([]string{"Application VM", "Used memory", "Current memory", "Max memory", "New memory"})
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for _, d := range domains {
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if d.Name[0:5] == "appvm" {
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name := d.Name[6:]
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memoryUsedRaw, err := ioutil.ReadFile(os.Getenv("HOME") + "/appvm/" + name + "/.memory_used")
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if err != nil {
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log.Fatal(err)
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}
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memoryUsedMiB, err := strconv.Atoi(string(memoryUsedRaw[0 : len(memoryUsedRaw)-1]))
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if err != nil {
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log.Fatal(err)
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}
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memoryUsed := memoryUsedMiB * 1024
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_, memoryMax, memoryCurrent, _, _, err := l.DomainGetInfo(d)
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if err != nil {
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log.Fatal(err)
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}
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memoryNew := uint64(float64(memoryUsed) * 1.2) // +20%
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if memoryNew > memoryMax {
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memoryNew = memoryMax - 1
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}
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if memoryNew < memoryMin {
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memoryNew = memoryMin
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}
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err = l.DomainSetMemory(d, memoryNew)
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if err != nil {
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log.Fatal(err)
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}
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table.Append([]string{name,
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fmt.Sprintf("%d", memoryUsed),
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fmt.Sprintf("%d", memoryCurrent),
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fmt.Sprintf("%d", memoryMax),
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fmt.Sprintf("%d", memoryNew)})
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}
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}
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table.Render()
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}
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func main() {
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c, err := net.DialTimeout("unix", "/var/run/libvirt/libvirt-sock", time.Second)
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if err != nil {
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@ -252,6 +308,7 @@ func main() {
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defer l.Disconnect()
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kingpin.Command("list", "List applications")
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kingpin.Command("autoballoon", "Automatically adjust/reduce app vm memory")
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startName := kingpin.Command("start", "Start application").Arg("name", "Application name").Required().String()
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stopName := kingpin.Command("stop", "Stop application").Arg("name", "Application name").Required().String()
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dropName := kingpin.Command("drop", "Remove application data").Arg("name", "Application name").Required().String()
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@ -265,5 +322,7 @@ func main() {
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stop(l, *stopName)
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case "drop":
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drop(*dropName)
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case "autoballoon":
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autoBalloon(l)
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}
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}
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