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scale.go
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scale.go
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package cmd
import (
"encoding/json"
"fmt"
"os"
"strconv"
"github.com/superfly/flyctl/cmdctx"
"github.com/superfly/flyctl/api"
"github.com/superfly/flyctl/docstrings"
"github.com/spf13/cobra"
)
func newScaleCommand() *Command {
scaleStrings := docstrings.Get("scale")
cmd := BuildCommandKS(nil, nil, scaleStrings, os.Stdout, requireSession, requireAppName)
vmCmdStrings := docstrings.Get("scale.vm")
vmCmd := BuildCommand(cmd, runScaleVM, vmCmdStrings.Usage, vmCmdStrings.Short, vmCmdStrings.Long, os.Stdout, requireSession, requireAppName)
vmCmd.Args = cobra.ExactArgs(1)
vmCmd.AddIntFlag(IntFlagOpts{
Name: "memory",
Description: "Memory in MB for the VM",
Default: 0,
})
memoryCmdStrings := docstrings.Get("scale.memory")
memoryCmd := BuildCommandKS(cmd, runScaleMemory, memoryCmdStrings, os.Stdout, requireSession, requireAppName)
memoryCmd.Args = cobra.ExactArgs(1)
countCmdStrings := docstrings.Get("scale.count")
countCmd := BuildCommand(cmd, runScaleCount, countCmdStrings.Usage, countCmdStrings.Short, countCmdStrings.Long, os.Stdout, requireSession, requireAppName)
countCmd.Args = cobra.ExactArgs(1)
showCmdStrings := docstrings.Get("scale.show")
BuildCommand(cmd, runScaleShow, showCmdStrings.Usage, showCmdStrings.Short, showCmdStrings.Long, os.Stdout, requireSession, requireAppName)
return cmd
}
func runScaleVM(commandContext *cmdctx.CmdContext) error {
sizeName := commandContext.Args[0]
memoryMB := int64(commandContext.Config.GetInt("memory"))
size, err := commandContext.Client.API().SetAppVMSize(commandContext.AppName, sizeName, memoryMB)
if err != nil {
return err
}
fmt.Println("Scaled VM Type to", size.Name)
fmt.Printf("%15s: %s\n", "CPU Cores", formatCores(size))
fmt.Printf("%15s: %s\n", "Memory", formatMemory(size))
return nil
}
func runScaleCount(commandContext *cmdctx.CmdContext) error {
count, err := strconv.Atoi(commandContext.Args[0])
if err != nil {
return err
}
counts, warnings, err := commandContext.Client.API().SetAppVMCount(commandContext.AppName, count)
if err != nil {
return err
}
if len(warnings) > 0 {
for _, warning := range warnings {
fmt.Println("Warning:", warning)
}
fmt.Println()
}
// only use the "app" tg right now
var appCount int
for _, tg := range counts {
if tg.Name == "app" {
appCount = tg.Count
}
}
fmt.Printf("Count changed to %d\n", appCount)
return nil
}
func runScaleShow(commandContext *cmdctx.CmdContext) error {
size, tgCounts, err := commandContext.Client.API().AppVMResources(commandContext.AppName)
if err != nil {
return err
}
fmt.Printf("VM Resources for %s\n", commandContext.AppName)
// only use the "app" tg right now
var appCount int
for _, tg := range tgCounts {
if tg.Name == "app" {
appCount = tg.Count
}
}
printVMResources(commandContext, size, appCount)
return nil
}
func printVMResources(commandContext *cmdctx.CmdContext, vmSize api.VMSize, count int) {
if commandContext.OutputJSON() {
out := struct {
api.VMSize
Count int
}{
VMSize: vmSize,
Count: count,
}
prettyJSON, _ := json.MarshalIndent(out, "", " ")
fmt.Fprintln(commandContext.Out, string(prettyJSON))
return
}
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: %d\n", "Count", count)
}
func runScaleMemory(commandContext *cmdctx.CmdContext) error {
memoryMB, err := strconv.ParseInt(commandContext.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 := commandContext.Client.API().AppVMResources(commandContext.AppName)
if err != nil {
return err
}
size, err := commandContext.Client.API().SetAppVMSize(commandContext.AppName, 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))
}