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scale.go
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scale.go
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package cmd
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"github.com/superfly/flyctl/cmdctx"
"github.com/superfly/flyctl/internal/client"
"github.com/superfly/flyctl/api"
"github.com/superfly/flyctl/docstrings"
"github.com/spf13/cobra"
)
func newScaleCommand(client *client.Client) *Command {
scaleStrings := docstrings.Get("scale")
cmd := BuildCommandKS(nil, nil, scaleStrings, client, requireSession, requireAppName)
vmCmdStrings := docstrings.Get("scale.vm")
vmCmd := BuildCommand(cmd, runScaleVM, vmCmdStrings.Usage, vmCmdStrings.Short, vmCmdStrings.Long, client, requireSession, requireAppName)
vmCmd.Args = cobra.ExactArgs(1)
vmCmd.AddIntFlag(IntFlagOpts{
Name: "memory",
Description: "Memory in MB for the VM",
Default: 0,
})
vmCmd.AddStringFlag(StringFlagOpts{
Name: "group",
Description: "The process group to apply the VM size to",
Default: "",
})
memoryCmdStrings := docstrings.Get("scale.memory")
memoryCmd := BuildCommandKS(cmd, runScaleMemory, memoryCmdStrings, client, requireSession, requireAppName)
memoryCmd.Args = cobra.ExactArgs(1)
memoryCmd.AddStringFlag(StringFlagOpts{
Name: "group",
Description: "The process group to apply the memory size to",
Default: "",
})
countCmdStrings := docstrings.Get("scale.count")
countCmd := BuildCommand(cmd, runScaleCount, countCmdStrings.Usage, countCmdStrings.Short, countCmdStrings.Long, client, requireSession, requireAppName)
countCmd.Args = cobra.MinimumNArgs(1)
countCmd.AddIntFlag((IntFlagOpts{
Name: "max-per-region",
Description: "Max number of VMs per region",
Default: -1,
}))
showCmdStrings := docstrings.Get("scale.show")
BuildCommand(cmd, runScaleShow, showCmdStrings.Usage, showCmdStrings.Short, showCmdStrings.Long, client, requireSession, requireAppName)
return cmd
}
func runScaleVM(cmdCtx *cmdctx.CmdContext) error {
ctx := cmdCtx.Command.Context()
sizeName := cmdCtx.Args[0]
memoryMB := int64(cmdCtx.Config.GetInt("memory"))
group := cmdCtx.Config.GetString("group")
size, err := cmdCtx.Client.API().SetAppVMSize(ctx, cmdCtx.AppName, group, sizeName, memoryMB)
if err != nil {
return err
}
if group == "" {
fmt.Println("Scaled VM Type to\n", size.Name)
} else {
fmt.Printf("Scaled VM Type for \"%s\" to %s\n", group, size.Name)
}
fmt.Printf("%15s: %s\n", "CPU Cores", formatCores(size))
fmt.Printf("%15s: %s\n", "Memory", formatMemory(size))
return nil
}
func runScaleCount(cmdCtx *cmdctx.CmdContext) error {
ctx := cmdCtx.Command.Context()
groups := map[string]int{}
// single numeric arg: fly scale count 3
if len(cmdCtx.Args) == 1 {
count, err := strconv.Atoi(cmdCtx.Args[0])
if err == nil {
groups["app"] = count
}
}
// group labels: fly scale web=X worker=Y
if len(groups) < 1 {
for _, arg := range cmdCtx.Args {
parts := strings.Split(arg, "=")
if len(parts) != 2 {
return fmt.Errorf("%s is not a valid process=count option", arg)
}
count, err := strconv.Atoi(parts[1])
if err != nil {
return err
}
groups[parts[0]] = count
}
}
// THIS IS AN OPTION TYPE CAN YOU TELL?
maxPerRegionRaw := cmdCtx.Config.GetInt("max-per-region")
maxPerRegion := &maxPerRegionRaw
if maxPerRegionRaw == -1 {
maxPerRegion = nil
}
counts, warnings, err := cmdCtx.Client.API().SetAppVMCount(ctx, cmdCtx.AppName, groups, maxPerRegion)
if err != nil {
return err
}
if len(warnings) > 0 {
for _, warning := range warnings {
fmt.Println("Warning:", warning)
}
fmt.Println()
}
msg := countMessage(counts)
fmt.Printf("Count changed to %s\n", msg)
return nil
}
func runScaleShow(cmdCtx *cmdctx.CmdContext) error {
ctx := cmdCtx.Command.Context()
size, tgCounts, processGroups, err := cmdCtx.Client.API().AppVMResources(ctx, cmdCtx.AppName)
if err != nil {
return err
}
countMsg := countMessage(tgCounts)
maxPerRegionMsg := maxPerRegionMessage(processGroups)
printVMResources(cmdCtx, size, countMsg, maxPerRegionMsg)
return nil
}
func countMessage(counts []api.TaskGroupCount) string {
msg := ""
if len(counts) == 1 {
for _, tg := range counts {
if tg.Name == "app" {
msg = fmt.Sprint(tg.Count)
}
}
}
if msg == "" {
for _, tg := range counts {
msg += fmt.Sprintf("%s=%d ", tg.Name, tg.Count)
}
}
return msg
//return fmt.Sprintf("Count changed to %s\n", msg)
}
func maxPerRegionMessage(groups []api.ProcessGroup) string {
msg := ""
if len(groups) == 1 {
for _, pg := range groups {
if pg.Name == "app" {
if pg.MaxPerRegion == 0 {
msg = "Not set"
} else {
msg = fmt.Sprint(pg.MaxPerRegion)
}
}
}
}
if msg == "" {
for _, pg := range groups {
msg += fmt.Sprintf("%s=%d ", pg.Name, pg.MaxPerRegion)
}
}
return msg
}
func printVMResources(commandContext *cmdctx.CmdContext, vmSize api.VMSize, count string, maxPerRegion string) {
if commandContext.OutputJSON() {
out := struct {
api.VMSize
Count string
MaxPerRegion string
}{
VMSize: vmSize,
Count: count,
MaxPerRegion: maxPerRegion,
}
prettyJSON, _ := json.MarshalIndent(out, "", " ")
fmt.Fprintln(commandContext.Out, string(prettyJSON))
return
}
fmt.Printf("VM Resources for %s\n", commandContext.AppName)
fmt.Fprintf(commandContext.Out, "%15s: %s\n", "VM Size", vmSize.Name)
fmt.Fprintf(commandContext.Out, "%15s: %s\n", "VM Memory", formatMemory(vmSize))
fmt.Fprintf(commandContext.Out, "%15s: %s\n", "Count", count)
fmt.Fprintf(commandContext.Out, "%15s: %s\n", "Max Per Region", maxPerRegion)
}
func runScaleMemory(cmdCtx *cmdctx.CmdContext) error {
ctx := cmdCtx.Command.Context()
memoryMB, err := strconv.ParseInt(cmdCtx.Args[0], 10, 64)
if err != nil {
return err
}
// API doesn't allow memory setting on own yet, so get get the current size for the mutation
currentsize, _, _, err := cmdCtx.Client.API().AppVMResources(ctx, cmdCtx.AppName)
if err != nil {
return err
}
group := cmdCtx.Config.GetString("group")
size, err := cmdCtx.Client.API().SetAppVMSize(ctx, cmdCtx.AppName, group, currentsize.Name, memoryMB)
if err != nil {
return err
}
fmt.Println("Scaled VM Memory size to", formatMemory(size))
fmt.Printf("%15s: %s\n", "CPU Cores", formatCores(size))
fmt.Printf("%15s: %s\n", "Memory", formatMemory(size))
return nil
}
// TODO: Move these funcs (also in presenters.VMSizes into presentation package)
func formatCores(size api.VMSize) string {
if size.CPUCores < 1.0 {
return fmt.Sprintf("%.2f", size.CPUCores)
}
return fmt.Sprintf("%d", int(size.CPUCores))
}
func formatMemory(size api.VMSize) string {
if size.MemoryGB < 1.0 {
return fmt.Sprintf("%d MB", size.MemoryMB)
}
return fmt.Sprintf("%d GB", int(size.MemoryGB))
}