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backend_plan.go
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backend_plan.go
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package remote
import (
"bufio"
"context"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"syscall"
"time"
tfe "github.com/hashicorp/go-tfe"
version "github.com/hashicorp/go-version"
"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/tfdiags"
)
func (b *Remote) opPlan(stopCtx, cancelCtx context.Context, op *backend.Operation, w *tfe.Workspace) (*tfe.Run, error) {
log.Printf("[INFO] backend/remote: starting Plan operation")
var diags tfdiags.Diagnostics
if !w.Permissions.CanQueueRun {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Insufficient rights to generate a plan",
"The provided credentials have insufficient rights to generate a plan. In order "+
"to generate plans, at least plan permissions on the workspace are required.",
))
return nil, diags.Err()
}
if op.Parallelism != defaultParallelism {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Custom parallelism values are currently not supported",
`The "remote" backend does not support setting a custom parallelism `+
`value at this time.`,
))
}
if op.PlanFile != nil {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Displaying a saved plan is currently not supported",
`The "remote" backend currently requires configuration to be present and `+
`does not accept an existing saved plan as an argument at this time.`,
))
}
if op.PlanOutPath != "" {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Saving a generated plan is currently not supported",
`The "remote" backend does not support saving the generated execution `+
`plan locally at this time.`,
))
}
if !op.PlanRefresh {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Planning without refresh is currently not supported",
`Currently the "remote" backend will always do an in-memory refresh of `+
`the Terraform state prior to generating the plan.`,
))
}
if b.hasExplicitVariableValues(op) {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Run variables are currently not supported",
fmt.Sprintf(
"The \"remote\" backend does not support setting run variables at this time. "+
"Currently the only to way to pass variables to the remote backend is by "+
"creating a '*.auto.tfvars' variables file. This file will automatically "+
"be loaded by the \"remote\" backend when the workspace is configured to use "+
"Terraform v0.10.0 or later.\n\nAdditionally you can also set variables on "+
"the workspace in the web UI:\nhttps://%s/app/%s/%s/variables",
b.hostname, b.organization, op.Workspace,
),
))
}
if !op.HasConfig() && !op.Destroy {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"No configuration files found",
`Plan requires configuration to be present. Planning without a configuration `+
`would mark everything for destruction, which is normally not what is desired. `+
`If you would like to destroy everything, please run plan with the "-destroy" `+
`flag or create a single empty configuration file. Otherwise, please create `+
`a Terraform configuration file in the path being executed and try again.`,
))
}
if len(op.Targets) != 0 {
// For API versions prior to 2.3, RemoteAPIVersion will return an empty string,
// so if there's an error when parsing the RemoteAPIVersion, it's handled as
// equivalent to an API version < 2.3.
currentAPIVersion, parseErr := version.NewVersion(b.client.RemoteAPIVersion())
desiredAPIVersion, _ := version.NewVersion("2.3")
if parseErr != nil || currentAPIVersion.LessThan(desiredAPIVersion) {
diags = diags.Append(tfdiags.Sourceless(
tfdiags.Error,
"Resource targeting is not supported",
fmt.Sprintf(
`The host %s does not support the -target option for `+
`remote plans.`,
b.hostname,
),
))
}
}
// Return if there are any errors.
if diags.HasErrors() {
return nil, diags.Err()
}
return b.plan(stopCtx, cancelCtx, op, w)
}
func (b *Remote) plan(stopCtx, cancelCtx context.Context, op *backend.Operation, w *tfe.Workspace) (*tfe.Run, error) {
if b.CLI != nil {
header := planDefaultHeader
if op.Type == backend.OperationTypeApply {
header = applyDefaultHeader
}
b.CLI.Output(b.Colorize().Color(strings.TrimSpace(header) + "\n"))
}
configOptions := tfe.ConfigurationVersionCreateOptions{
AutoQueueRuns: tfe.Bool(false),
Speculative: tfe.Bool(op.Type == backend.OperationTypePlan),
}
cv, err := b.client.ConfigurationVersions.Create(stopCtx, w.ID, configOptions)
if err != nil {
return nil, generalError("Failed to create configuration version", err)
}
var configDir string
if op.ConfigDir != "" {
// De-normalize the configuration directory path.
configDir, err = filepath.Abs(op.ConfigDir)
if err != nil {
return nil, generalError(
"Failed to get absolute path of the configuration directory: %v", err)
}
// Make sure to take the working directory into account by removing
// the working directory from the current path. This will result in
// a path that points to the expected root of the workspace.
configDir = filepath.Clean(strings.TrimSuffix(
filepath.Clean(configDir),
filepath.Clean(w.WorkingDirectory),
))
// If the workspace has a subdirectory as its working directory then
// our configDir will be some parent directory of the current working
// directory. Users are likely to find that surprising, so we'll
// produce an explicit message about it to be transparent about what
// we are doing and why.
if w.WorkingDirectory != "" && filepath.Base(configDir) != w.WorkingDirectory {
if b.CLI != nil {
b.CLI.Output(fmt.Sprintf(strings.TrimSpace(`
The remote workspace is configured to work with configuration at
%s relative to the target repository.
Terraform will upload the contents of the following directory,
excluding files or directories as defined by a .terraformignore file
at %s/.terraformignore (if it is present),
in order to capture the filesystem context the remote workspace expects:
%s
`), w.WorkingDirectory, configDir, configDir) + "\n")
}
}
} else {
// We did a check earlier to make sure we either have a config dir,
// or the plan is run with -destroy. So this else clause will only
// be executed when we are destroying and doesn't need the config.
configDir, err = ioutil.TempDir("", "tf")
if err != nil {
return nil, generalError("Failed to create temporary directory", err)
}
defer os.RemoveAll(configDir)
// Make sure the configured working directory exists.
err = os.MkdirAll(filepath.Join(configDir, w.WorkingDirectory), 0700)
if err != nil {
return nil, generalError(
"Failed to create temporary working directory", err)
}
}
err = b.client.ConfigurationVersions.Upload(stopCtx, cv.UploadURL, configDir)
if err != nil {
return nil, generalError("Failed to upload configuration files", err)
}
uploaded := false
for i := 0; i < 60 && !uploaded; i++ {
select {
case <-stopCtx.Done():
return nil, context.Canceled
case <-cancelCtx.Done():
return nil, context.Canceled
case <-time.After(500 * time.Millisecond):
cv, err = b.client.ConfigurationVersions.Read(stopCtx, cv.ID)
if err != nil {
return nil, generalError("Failed to retrieve configuration version", err)
}
if cv.Status == tfe.ConfigurationUploaded {
uploaded = true
}
}
}
if !uploaded {
return nil, generalError(
"Failed to upload configuration files", errors.New("operation timed out"))
}
queueMessage := "Queued manually using Terraform"
if op.Targets != nil {
queueMessage = "Queued manually via Terraform using -target"
}
runOptions := tfe.RunCreateOptions{
IsDestroy: tfe.Bool(op.Destroy),
Message: tfe.String(queueMessage),
ConfigurationVersion: cv,
Workspace: w,
}
if len(op.Targets) != 0 {
runOptions.TargetAddrs = make([]string, 0, len(op.Targets))
for _, addr := range op.Targets {
// The API client wants the normal string representation of a
// target address, which will ultimately get inserted into a
// -target option when Terraform CLI is launched in the
// Cloud/Enterprise execution environment.
runOptions.TargetAddrs = append(runOptions.TargetAddrs, addr.String())
}
}
r, err := b.client.Runs.Create(stopCtx, runOptions)
if err != nil {
return r, generalError("Failed to create run", err)
}
// When the lock timeout is set,
if op.StateLockTimeout > 0 {
go func() {
select {
case <-stopCtx.Done():
return
case <-cancelCtx.Done():
return
case <-time.After(op.StateLockTimeout):
// Retrieve the run to get its current status.
r, err := b.client.Runs.Read(cancelCtx, r.ID)
if err != nil {
log.Printf("[ERROR] error reading run: %v", err)
return
}
if r.Status == tfe.RunPending && r.Actions.IsCancelable {
if b.CLI != nil {
b.CLI.Output(b.Colorize().Color(strings.TrimSpace(lockTimeoutErr)))
}
// We abuse the auto aprove flag to indicate that we do not
// want to ask if the remote operation should be canceled.
op.AutoApprove = true
p, err := os.FindProcess(os.Getpid())
if err != nil {
log.Printf("[ERROR] error searching process ID: %v", err)
return
}
p.Signal(syscall.SIGINT)
}
}
}()
}
if b.CLI != nil {
b.CLI.Output(b.Colorize().Color(strings.TrimSpace(fmt.Sprintf(
runHeader, b.hostname, b.organization, op.Workspace, r.ID)) + "\n"))
}
r, err = b.waitForRun(stopCtx, cancelCtx, op, "plan", r, w)
if err != nil {
return r, err
}
logs, err := b.client.Plans.Logs(stopCtx, r.Plan.ID)
if err != nil {
return r, generalError("Failed to retrieve logs", err)
}
reader := bufio.NewReaderSize(logs, 64*1024)
if b.CLI != nil {
for next := true; next; {
var l, line []byte
for isPrefix := true; isPrefix; {
l, isPrefix, err = reader.ReadLine()
if err != nil {
if err != io.EOF {
return r, generalError("Failed to read logs", err)
}
next = false
}
line = append(line, l...)
}
if next || len(line) > 0 {
b.CLI.Output(b.Colorize().Color(string(line)))
}
}
}
// Retrieve the run to get its current status.
r, err = b.client.Runs.Read(stopCtx, r.ID)
if err != nil {
return r, generalError("Failed to retrieve run", err)
}
// If the run is canceled or errored, we still continue to the
// cost-estimation and policy check phases to ensure we render any
// results available. In the case of a hard-failed policy check, the
// status of the run will be "errored", but there is still policy
// information which should be shown.
// Show any cost estimation output.
if r.CostEstimate != nil {
err = b.costEstimate(stopCtx, cancelCtx, op, r)
if err != nil {
return r, err
}
}
// Check any configured sentinel policies.
if len(r.PolicyChecks) > 0 {
err = b.checkPolicy(stopCtx, cancelCtx, op, r)
if err != nil {
return r, err
}
}
return r, nil
}
const planDefaultHeader = `
[reset][yellow]Running plan in the remote backend. Output will stream here. Pressing Ctrl-C
will stop streaming the logs, but will not stop the plan running remotely.[reset]
Preparing the remote plan...
`
const runHeader = `
[reset][yellow]To view this run in a browser, visit:
https://%s/app/%s/%s/runs/%s[reset]
`
// The newline in this error is to make it look good in the CLI!
const lockTimeoutErr = `
[reset][red]Lock timeout exceeded, sending interrupt to cancel the remote operation.
[reset]
`