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update.go
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update.go
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package machine
import (
"context"
"fmt"
"slices"
"time"
"github.com/superfly/flyctl/api"
"github.com/superfly/flyctl/flaps"
"github.com/superfly/flyctl/internal/watch"
"github.com/superfly/flyctl/iostreams"
"golang.org/x/exp/maps"
)
var cpusPerKind = map[string][]int{
"shared": {1, 2, 4, 6, 8},
"performance": {1, 2, 4, 6, 8, 10, 12, 14, 16},
}
func Update(ctx context.Context, m *api.Machine, input *api.LaunchMachineInput) error {
var (
flapsClient = flaps.FromContext(ctx)
io = iostreams.FromContext(ctx)
colorize = io.ColorScheme()
updatedMachine *api.Machine
err error
)
if input != nil && input.Config != nil && input.Config.Guest != nil {
var invalidConfigErr InvalidConfigErr
invalidConfigErr.guest = input.Config.Guest
// Check that there's a valid number of CPUs
validNumCpus, ok := cpusPerKind[input.Config.Guest.CPUKind]
if !ok {
invalidConfigErr.Reason = invalidCpuKind
return invalidConfigErr
} else if !slices.Contains(validNumCpus, input.Config.Guest.CPUs) {
invalidConfigErr.Reason = invalidNumCPUs
return invalidConfigErr
}
if input.Config.Guest.CPUKind == "shared" && input.Config.Guest.MemoryMB%256 != 0 {
invalidConfigErr.Reason = invalidMemorySize
return invalidConfigErr
} else if input.Config.Guest.CPUKind == "performance" && input.Config.Guest.MemoryMB%1024 != 0 {
invalidConfigErr.Reason = invalidMemorySize
return invalidConfigErr
}
// Check memory sizes
var min_memory_size int
if input.Config.Guest.CPUKind == "shared" {
min_memory_size = api.MIN_MEMORY_MB_PER_SHARED_CPU * input.Config.Guest.CPUs
} else if input.Config.Guest.CPUKind == "performance" {
min_memory_size = api.MIN_MEMORY_MB_PER_CPU * input.Config.Guest.CPUs
}
if min_memory_size > input.Config.Guest.MemoryMB {
invalidConfigErr.Reason = memoryTooLow
return invalidConfigErr
}
var maxMemory int
if input.Config.Guest.CPUKind == "shared" {
maxMemory = input.Config.Guest.CPUs * api.MAX_MEMORY_MB_PER_SHARED_CPU
} else if input.Config.Guest.CPUKind == "performance" {
maxMemory = input.Config.Guest.CPUs * api.MAX_MEMORY_MB_PER_CPU
}
if input.Config.Guest.MemoryMB > maxMemory {
invalidConfigErr.Reason = memoryTooHigh
return invalidConfigErr
}
}
fmt.Fprintf(io.Out, "Updating machine %s\n", colorize.Bold(m.ID))
input.ID = m.ID
updatedMachine, err = flapsClient.Update(ctx, *input, m.LeaseNonce)
if err != nil {
return fmt.Errorf("could not update machine %s: %w", m.ID, err)
}
waitForAction := "start"
if input.SkipLaunch || m.Config.Schedule != "" {
waitForAction = "stop"
}
waitTimeout := time.Second * 300
if input.Timeout != 0 {
waitTimeout = time.Duration(input.Timeout) * time.Second
}
if err := WaitForStartOrStop(ctx, updatedMachine, waitForAction, waitTimeout); err != nil {
return err
}
if !input.SkipLaunch {
if !input.SkipHealthChecks {
if err := watch.MachinesChecks(ctx, []*api.Machine{updatedMachine}); err != nil {
return fmt.Errorf("failed to wait for health checks to pass: %w", err)
}
}
}
fmt.Fprintf(io.Out, "Machine %s updated successfully!\n", colorize.Bold(m.ID))
return nil
}
type invalidConfigReason string
const (
invalidCpuKind invalidConfigReason = "invalid CPU kind"
invalidNumCPUs invalidConfigReason = "invalid number of CPUs"
invalidMemorySize invalidConfigReason = "invalid memory size"
memoryTooLow invalidConfigReason = "memory size for config is too low"
memoryTooHigh invalidConfigReason = "memory size for config is too high"
)
type InvalidConfigErr struct {
Reason invalidConfigReason
guest *api.MachineGuest
}
func (e InvalidConfigErr) Description() string {
switch e.Reason {
case invalidCpuKind:
return fmt.Sprintf("The CPU kind given: %s, is not valid", e.guest.CPUKind)
case invalidNumCPUs:
return fmt.Sprintf("For the CPU kind %s, %d CPUs is not valid", e.guest.CPUKind, e.guest.CPUs)
case invalidMemorySize:
return fmt.Sprintf("%dMiB of memory is not valid", e.guest.MemoryMB)
case memoryTooLow:
return fmt.Sprintf("For %s VMs with %d CPUs, %dMiB of memory is too low", e.guest.CPUKind, e.guest.CPUs, e.guest.MemoryMB)
case memoryTooHigh:
return fmt.Sprintf("For %s VMs with %d CPUs, %dMiB of memory is too high", e.guest.CPUKind, e.guest.CPUs, e.guest.MemoryMB)
}
return string(e.Reason)
}
func (e InvalidConfigErr) Suggestion() string {
switch e.Reason {
case invalidCpuKind:
return fmt.Sprintf("Valid values are %v", maps.Keys(cpusPerKind))
case invalidNumCPUs:
validNumCpus := cpusPerKind[e.guest.CPUKind]
return fmt.Sprintf("Valid numbers are %v", validNumCpus)
case invalidMemorySize:
var incrementSize int = 1024
switch e.guest.CPUKind {
case "shared":
incrementSize = 256
case "performance":
incrementSize = 1024
}
suggestedSize := e.guest.MemoryMB - (e.guest.MemoryMB % incrementSize)
if suggestedSize == 0 {
suggestedSize = incrementSize
}
return fmt.Sprintf("Memory size must be in a %d MiB increment (%dMiB would work)", incrementSize, suggestedSize)
case memoryTooLow:
var min_memory_size int
if e.guest.CPUKind == "shared" {
min_memory_size = api.MIN_MEMORY_MB_PER_SHARED_CPU * e.guest.CPUs
} else if e.guest.CPUKind == "performance" {
min_memory_size = api.MIN_MEMORY_MB_PER_CPU * e.guest.CPUs
}
return fmt.Sprintf("Try setting memory to a value >= %dMiB for the config changes requested", min_memory_size)
case memoryTooHigh:
var max_memory_size int
if e.guest.CPUKind == "shared" {
max_memory_size = api.MAX_MEMORY_MB_PER_SHARED_CPU * e.guest.CPUs
} else if e.guest.CPUKind == "performance" {
max_memory_size = api.MAX_MEMORY_MB_PER_CPU * e.guest.CPUs
}
return fmt.Sprintf("Try setting memory to a value <= %dMiB for the config changes requested", max_memory_size)
}
return ""
}
func (e InvalidConfigErr) DocURL() string {
return "https://fly.io/docs/machines/guides-examples/machine-sizing/"
}
func (e InvalidConfigErr) Error() string {
return string(e.Reason)
}