terraform/command/apply.go

391 lines
11 KiB
Go

package command
import (
"bytes"
"fmt"
"os"
"sort"
"strings"
"github.com/hashicorp/go-getter"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/config/hcl2shim"
"github.com/hashicorp/terraform/repl"
"github.com/hashicorp/terraform/states"
"github.com/hashicorp/terraform/tfdiags"
)
// ApplyCommand is a Command implementation that applies a Terraform
// configuration and actually builds or changes infrastructure.
type ApplyCommand struct {
Meta
// If true, then this apply command will become the "destroy"
// command. It is just like apply but only processes a destroy.
Destroy bool
}
func (c *ApplyCommand) Run(args []string) int {
var destroyForce, refresh, autoApprove bool
args, err := c.Meta.process(args, true)
if err != nil {
return 1
}
cmdName := "apply"
if c.Destroy {
cmdName = "destroy"
}
cmdFlags := c.Meta.flagSet(cmdName)
cmdFlags.BoolVar(&autoApprove, "auto-approve", false, "skip interactive approval of plan before applying")
if c.Destroy {
cmdFlags.BoolVar(&destroyForce, "force", false, "deprecated: same as auto-approve")
}
cmdFlags.BoolVar(&refresh, "refresh", true, "refresh")
cmdFlags.IntVar(&c.Meta.parallelism, "parallelism", DefaultParallelism, "parallelism")
cmdFlags.StringVar(&c.Meta.statePath, "state", "", "path")
cmdFlags.StringVar(&c.Meta.stateOutPath, "state-out", "", "path")
cmdFlags.StringVar(&c.Meta.backupPath, "backup", "", "path")
cmdFlags.BoolVar(&c.Meta.stateLock, "lock", true, "lock state")
cmdFlags.DurationVar(&c.Meta.stateLockTimeout, "lock-timeout", 0, "lock timeout")
cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
// 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.
args = cmdFlags.Args()
maybeInit := len(args) == 1
configPath, err := ModulePath(args)
if err != nil {
c.Ui.Error(err.Error())
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 {
// 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
}
// Do a detect to determine if we need to do an init + apply.
if detected, err := getter.Detect(configPath, pwd, getter.Detectors); err != nil {
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
}
// Change the config path to be the cwd
configPath = pwd
}
}
// Check if the path is a plan
planFile, err := c.PlanFile(configPath)
if err != nil {
c.Ui.Error(err.Error())
return 1
}
if c.Destroy && planFile != nil {
c.Ui.Error(fmt.Sprintf("Destroy can't be called with a plan file."))
return 1
}
if planFile != nil {
// Reset the config path for backend loading
configPath = ""
}
var diags tfdiags.Diagnostics
// Load the backend
var be backend.Enhanced
var beDiags tfdiags.Diagnostics
if planFile == nil {
backendConfig, configDiags := c.loadBackendConfig(configPath)
diags = diags.Append(configDiags)
if configDiags.HasErrors() {
c.showDiagnostics(diags)
return 1
}
be, beDiags = c.Backend(&BackendOpts{
Config: backendConfig,
})
} else {
plan, err := planFile.ReadPlan()
if err != nil {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Failed to read plan from plan file",
fmt.Sprintf("Cannot read the plan from the given plan file: %s.", err),
))
c.showDiagnostics(diags)
return 1
}
if plan.Backend.Config == nil {
// Should never happen; always indicates a bug in the creation of the plan file
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Failed to read plan from plan file",
fmt.Sprintf("The given plan file does not have a valid backend configuration. This is a bug in the Terraform command that generated this plan file."),
))
c.showDiagnostics(diags)
return 1
}
be, beDiags = c.BackendForPlan(plan.Backend)
}
diags = diags.Append(beDiags)
if beDiags.HasErrors() {
c.showDiagnostics(diags)
return 1
}
// Before we delegate to the backend, we'll print any warning diagnostics
// we've accumulated here, since the backend will start fresh with its own
// diagnostics.
c.showDiagnostics(diags)
diags = nil
// Build the operation
opReq := c.Operation(be)
opReq.AutoApprove = autoApprove
opReq.Destroy = c.Destroy
opReq.ConfigDir = configPath
opReq.PlanFile = planFile
opReq.PlanRefresh = refresh
opReq.Type = backend.OperationTypeApply
opReq.AutoApprove = autoApprove
opReq.DestroyForce = destroyForce
opReq.ConfigLoader, err = c.initConfigLoader()
if err != nil {
c.showDiagnostics(err)
return 1
}
{
var moreDiags tfdiags.Diagnostics
opReq.Variables, moreDiags = c.collectVariableValues()
diags = diags.Append(moreDiags)
if moreDiags.HasErrors() {
c.showDiagnostics(diags)
return 1
}
}
op, err := c.RunOperation(be, opReq)
if err != nil {
c.showDiagnostics(err)
return 1
}
if op.Result != backend.OperationSuccess {
return op.Result.ExitStatus()
}
if !c.Destroy {
if outputs := outputsAsString(op.State, addrs.RootModuleInstance, true); outputs != "" {
c.Ui.Output(c.Colorize().Color(outputs))
}
}
return op.Result.ExitStatus()
}
func (c *ApplyCommand) Help() string {
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 {
helpText := `
Usage: terraform apply [options] [DIR-OR-PLAN]
Builds or changes infrastructure according to Terraform configuration
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.
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.
-auto-approve Skip interactive approval of plan before applying.
-lock=true Lock the state file when locking is supported.
-lock-timeout=0s Duration to retry a state lock.
-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.
-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.
-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
a file. If "terraform.tfvars" or any ".auto.tfvars"
files are present, they will be automatically loaded.
`
return strings.TrimSpace(helpText)
}
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.
-auto-approve Skip interactive approval before destroying.
-force Deprecated: same as auto-approve.
-lock=true Lock the state file when locking is supported.
-lock-timeout=0s Duration to retry a state lock.
-no-color If specified, output won't contain any color.
-parallelism=n Limit the number of concurrent operations.
Defaults to 10.
-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.
-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
a file. If "terraform.tfvars" or any ".auto.tfvars"
files are present, they will be automatically loaded.
`
return strings.TrimSpace(helpText)
}
func outputsAsString(state *states.State, modPath addrs.ModuleInstance, includeHeader bool) string {
if state == nil {
return ""
}
ms := state.Module(modPath)
if ms == nil {
return ""
}
outputs := ms.OutputValues
outputBuf := new(bytes.Buffer)
if len(outputs) > 0 {
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 {
v := outputs[k]
if v.Sensitive {
outputBuf.WriteString(fmt.Sprintf("%s = <sensitive>\n", k))
continue
}
// Our formatter still wants an old-style raw interface{} value, so
// for now we'll just shim it.
// FIXME: Port the formatter to work with cty.Value directly.
legacyVal := hcl2shim.ConfigValueFromHCL2(v.Value)
result, err := repl.FormatResult(legacyVal)
if err != nil {
// We can't really return errors from here, so we'll just have
// to stub this out. This shouldn't happen in practice anyway.
result = "<error during formatting>"
}
outputBuf.WriteString(fmt.Sprintf("%s = %s\n", k, result))
}
}
return strings.TrimSpace(outputBuf.String())
}
const outputInterrupt = `Interrupt received.
Please wait for Terraform to exit or data loss may occur.
Gracefully shutting down...`