terraform/command/apply.go

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package command
import (
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"bytes"
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"context"
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"fmt"
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"os"
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"sort"
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"strings"
"github.com/hashicorp/terraform/tfdiags"
"github.com/hashicorp/go-getter"
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"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/config"
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"github.com/hashicorp/terraform/config/module"
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"github.com/hashicorp/terraform/terraform"
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)
// ApplyCommand is a Command implementation that applies a Terraform
// configuration and actually builds or changes infrastructure.
type ApplyCommand struct {
Meta
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// If true, then this apply command will become the "destroy"
// command. It is just like apply but only processes a destroy.
Destroy bool
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}
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func (c *ApplyCommand) Run(args []string) int {
var destroyForce, refresh, autoApprove bool
args, err := c.Meta.process(args, true)
if err != nil {
return 1
}
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cmdName := "apply"
if c.Destroy {
cmdName = "destroy"
}
cmdFlags := c.Meta.flagSet(cmdName)
if c.Destroy {
cmdFlags.BoolVar(&destroyForce, "force", false, "force")
}
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cmdFlags.BoolVar(&refresh, "refresh", true, "refresh")
if !c.Destroy {
cmdFlags.BoolVar(&autoApprove, "auto-approve", false, "skip interactive approval of plan before applying")
}
cmdFlags.IntVar(
&c.Meta.parallelism, "parallelism", DefaultParallelism, "parallelism")
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cmdFlags.StringVar(&c.Meta.statePath, "state", "", "path")
cmdFlags.StringVar(&c.Meta.stateOutPath, "state-out", "", "path")
cmdFlags.StringVar(&c.Meta.backupPath, "backup", "", "path")
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cmdFlags.BoolVar(&c.Meta.stateLock, "lock", true, "lock state")
cmdFlags.DurationVar(&c.Meta.stateLockTimeout, "lock-timeout", 0, "lock timeout")
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cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
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// Get the args. The "maybeInit" flag tracks whether we may need to
// initialize the configuration from a remote path. This is true as long
// as we have an argument.
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args = cmdFlags.Args()
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maybeInit := len(args) == 1
configPath, err := ModulePath(args)
if err != nil {
c.Ui.Error(err.Error())
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return 1
}
// Check for user-supplied plugin path
if c.pluginPath, err = c.loadPluginPath(); err != nil {
c.Ui.Error(fmt.Sprintf("Error loading plugin path: %s", err))
return 1
}
if !c.Destroy && maybeInit {
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// We need the pwd for the getter operation below
pwd, err := os.Getwd()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error getting pwd: %s", err))
return 1
}
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// Do a detect to determine if we need to do an init + apply.
if detected, err := getter.Detect(configPath, pwd, getter.Detectors); err != nil {
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c.Ui.Error(fmt.Sprintf(
"Invalid path: %s", err))
return 1
} else if !strings.HasPrefix(detected, "file") {
// If this isn't a file URL then we're doing an init +
// apply.
var init InitCommand
init.Meta = c.Meta
if code := init.Run([]string{detected}); code != 0 {
return code
}
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// Change the config path to be the cwd
configPath = pwd
}
}
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// Check if the path is a plan
plan, err := c.Plan(configPath)
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if err != nil {
c.Ui.Error(err.Error())
return 1
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}
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if c.Destroy && plan != nil {
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c.Ui.Error(fmt.Sprintf(
"Destroy can't be called with a plan file."))
return 1
}
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if plan != nil {
// Reset the config path for backend loading
configPath = ""
}
var diags tfdiags.Diagnostics
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// Load the module if we don't have one yet (not running from plan)
var mod *module.Tree
if plan == nil {
var modDiags tfdiags.Diagnostics
mod, modDiags = c.Module(configPath)
diags = diags.Append(modDiags)
if modDiags.HasErrors() {
c.showDiagnostics(diags)
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return 1
}
}
var conf *config.Config
if mod != nil {
conf = mod.Config()
}
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// Load the backend
b, err := c.Backend(&BackendOpts{
Config: conf,
Plan: plan,
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})
if err != nil {
c.Ui.Error(fmt.Sprintf("Failed to load backend: %s", err))
return 1
}
// Build the operation
opReq := c.Operation()
opReq.Destroy = c.Destroy
opReq.Module = mod
opReq.Plan = plan
opReq.PlanRefresh = refresh
opReq.Type = backend.OperationTypeApply
opReq.AutoApprove = autoApprove
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opReq.DestroyForce = destroyForce
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// Perform the operation
ctx, ctxCancel := context.WithCancel(context.Background())
defer ctxCancel()
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op, err := b.Operation(ctx, opReq)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error starting operation: %s", err))
return 1
}
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// Wait for the operation to complete or an interrupt to occur
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select {
case <-c.ShutdownCh:
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// Cancel our context so we can start gracefully exiting
ctxCancel()
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// Notify the user
c.Ui.Output(outputInterrupt)
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// Still get the result, since there is still one
select {
case <-c.ShutdownCh:
c.Ui.Error(
"Two interrupts received. Exiting immediately. Note that data\n" +
"loss may have occurred.")
return 1
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case <-op.Done():
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}
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case <-op.Done():
if err := op.Err; err != nil {
diags = diags.Append(err)
}
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}
c.showDiagnostics(diags)
if diags.HasErrors() {
return 1
}
if !c.Destroy {
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// Get the right module that we used. If we ran a plan, then use
// that module.
if plan != nil {
mod = plan.Module
}
if outputs := outputsAsString(op.State, terraform.RootModulePath, mod.Config().Outputs, true); outputs != "" {
c.Ui.Output(c.Colorize().Color(outputs))
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}
}
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return 0
}
func (c *ApplyCommand) Help() string {
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if c.Destroy {
return c.helpDestroy()
}
return c.helpApply()
}
func (c *ApplyCommand) Synopsis() string {
if c.Destroy {
return "Destroy Terraform-managed infrastructure"
}
return "Builds or changes infrastructure"
}
func (c *ApplyCommand) helpApply() string {
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helpText := `
Usage: terraform apply [options] [DIR-OR-PLAN]
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Builds or changes infrastructure according to Terraform configuration
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files in DIR.
By default, apply scans the current directory for the configuration
and applies the changes appropriately. However, a path to another
configuration or an execution plan can be provided. Execution plans can be
used to only execute a pre-determined set of actions.
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Options:
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-backup=path Path to backup the existing state file before
modifying. Defaults to the "-state-out" path with
".backup" extension. Set to "-" to disable backup.
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-lock=true Lock the state file when locking is supported.
-lock-timeout=0s Duration to retry a state lock.
-auto-approve Skip interactive approval of plan before applying.
-input=true Ask for input for variables if not directly set.
-no-color If specified, output won't contain any color.
-parallelism=n Limit the number of parallel resource operations.
Defaults to 10.
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-refresh=true Update state prior to checking for differences. This
has no effect if a plan file is given to apply.
-state=path Path to read and save state (unless state-out
is specified). Defaults to "terraform.tfstate".
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-state-out=path Path to write state to that is different than
"-state". This can be used to preserve the old
state.
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-target=resource Resource to target. Operation will be limited to this
resource and its dependencies. This flag can be used
multiple times.
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-var 'foo=bar' Set a variable in the Terraform configuration. This
flag can be set multiple times.
-var-file=foo Set variables in the Terraform configuration from
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a file. If "terraform.tfvars" or any ".auto.tfvars"
files are present, they will be automatically loaded.
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`
return strings.TrimSpace(helpText)
}
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func (c *ApplyCommand) helpDestroy() string {
helpText := `
Usage: terraform destroy [options] [DIR]
Destroy Terraform-managed infrastructure.
Options:
-backup=path Path to backup the existing state file before
modifying. Defaults to the "-state-out" path with
".backup" extension. Set to "-" to disable backup.
-force Don't ask for input for destroy confirmation.
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-lock=true Lock the state file when locking is supported.
-lock-timeout=0s Duration to retry a state lock.
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-no-color If specified, output won't contain any color.
-parallelism=n Limit the number of concurrent operations.
Defaults to 10.
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-refresh=true Update state prior to checking for differences. This
has no effect if a plan file is given to apply.
-state=path Path to read and save state (unless state-out
is specified). Defaults to "terraform.tfstate".
-state-out=path Path to write state to that is different than
"-state". This can be used to preserve the old
state.
-target=resource Resource to target. Operation will be limited to this
resource and its dependencies. This flag can be used
multiple times.
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-var 'foo=bar' Set a variable in the Terraform configuration. This
flag can be set multiple times.
-var-file=foo Set variables in the Terraform configuration from
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a file. If "terraform.tfvars" or any ".auto.tfvars"
files are present, they will be automatically loaded.
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`
return strings.TrimSpace(helpText)
}
func outputsAsString(state *terraform.State, modPath []string, schema []*config.Output, includeHeader bool) string {
if state == nil {
return ""
}
ms := state.ModuleByPath(modPath)
if ms == nil {
return ""
}
outputs := ms.Outputs
outputBuf := new(bytes.Buffer)
if len(outputs) > 0 {
schemaMap := make(map[string]*config.Output)
if schema != nil {
for _, s := range schema {
schemaMap[s.Name] = s
}
}
if includeHeader {
outputBuf.WriteString("[reset][bold][green]\nOutputs:\n\n")
}
// Output the outputs in alphabetical order
keyLen := 0
ks := make([]string, 0, len(outputs))
for key, _ := range outputs {
ks = append(ks, key)
if len(key) > keyLen {
keyLen = len(key)
}
}
sort.Strings(ks)
for _, k := range ks {
schema, ok := schemaMap[k]
if ok && schema.Sensitive {
outputBuf.WriteString(fmt.Sprintf("%s = <sensitive>\n", k))
continue
}
v := outputs[k]
switch typedV := v.Value.(type) {
case string:
outputBuf.WriteString(fmt.Sprintf("%s = %s\n", k, typedV))
case []interface{}:
outputBuf.WriteString(formatListOutput("", k, typedV))
outputBuf.WriteString("\n")
case map[string]interface{}:
outputBuf.WriteString(formatMapOutput("", k, typedV))
outputBuf.WriteString("\n")
}
}
}
return strings.TrimSpace(outputBuf.String())
}
const outputInterrupt = `Interrupt received.
Please wait for Terraform to exit or data loss may occur.
Gracefully shutting down...`