602 lines
15 KiB
Go
602 lines
15 KiB
Go
package ansible
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import (
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"bufio"
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"bytes"
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net"
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"os"
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"os/exec"
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"os/user"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"unicode"
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"golang.org/x/crypto/ssh"
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"github.com/hashicorp/packer/common"
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commonhelper "github.com/hashicorp/packer/helper/common"
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"github.com/hashicorp/packer/helper/config"
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"github.com/hashicorp/packer/packer"
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"github.com/hashicorp/packer/template/interpolate"
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)
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type Config struct {
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common.PackerConfig `mapstructure:",squash"`
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ctx interpolate.Context
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// The command to run ansible
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Command string
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// Extra options to pass to the ansible command
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ExtraArguments []string `mapstructure:"extra_arguments"`
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AnsibleEnvVars []string `mapstructure:"ansible_env_vars"`
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// The main playbook file to execute.
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PlaybookFile string `mapstructure:"playbook_file"`
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Groups []string `mapstructure:"groups"`
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EmptyGroups []string `mapstructure:"empty_groups"`
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HostAlias string `mapstructure:"host_alias"`
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User string `mapstructure:"user"`
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LocalPort string `mapstructure:"local_port"`
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SSHHostKeyFile string `mapstructure:"ssh_host_key_file"`
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SSHAuthorizedKeyFile string `mapstructure:"ssh_authorized_key_file"`
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SFTPCmd string `mapstructure:"sftp_command"`
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SkipVersionCheck bool `mapstructure:"skip_version_check"`
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UseSFTP bool `mapstructure:"use_sftp"`
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InventoryDirectory string `mapstructure:"inventory_directory"`
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InventoryFile string `mapstructure:"inventory_file"`
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}
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type Provisioner struct {
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config Config
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adapter *adapter
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done chan struct{}
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ansibleVersion string
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ansibleMajVersion uint
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}
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type PassthroughTemplate struct {
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WinRMPassword string
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}
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func (p *Provisioner) Prepare(raws ...interface{}) error {
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p.done = make(chan struct{})
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// Create passthrough for winrm password so we can fill it in once we know
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// it
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p.config.ctx.Data = &PassthroughTemplate{
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WinRMPassword: `{{.WinRMPassword}}`,
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}
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err := config.Decode(&p.config, &config.DecodeOpts{
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Interpolate: true,
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InterpolateContext: &p.config.ctx,
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InterpolateFilter: &interpolate.RenderFilter{
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Exclude: []string{},
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},
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}, raws...)
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if err != nil {
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return err
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}
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// Defaults
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if p.config.Command == "" {
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p.config.Command = "ansible-playbook"
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}
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if p.config.HostAlias == "" {
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p.config.HostAlias = "default"
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}
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var errs *packer.MultiError
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err = validateFileConfig(p.config.PlaybookFile, "playbook_file", true)
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if err != nil {
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errs = packer.MultiErrorAppend(errs, err)
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}
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// Check that the authorized key file exists
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if len(p.config.SSHAuthorizedKeyFile) > 0 {
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err = validateFileConfig(p.config.SSHAuthorizedKeyFile, "ssh_authorized_key_file", true)
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if err != nil {
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log.Println(p.config.SSHAuthorizedKeyFile, "does not exist")
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errs = packer.MultiErrorAppend(errs, err)
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}
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}
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if len(p.config.SSHHostKeyFile) > 0 {
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err = validateFileConfig(p.config.SSHHostKeyFile, "ssh_host_key_file", true)
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if err != nil {
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log.Println(p.config.SSHHostKeyFile, "does not exist")
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errs = packer.MultiErrorAppend(errs, err)
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}
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} else {
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p.config.AnsibleEnvVars = append(p.config.AnsibleEnvVars, "ANSIBLE_HOST_KEY_CHECKING=False")
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}
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if !p.config.UseSFTP {
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p.config.AnsibleEnvVars = append(p.config.AnsibleEnvVars, "ANSIBLE_SCP_IF_SSH=True")
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}
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if len(p.config.LocalPort) > 0 {
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if _, err := strconv.ParseUint(p.config.LocalPort, 10, 16); err != nil {
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errs = packer.MultiErrorAppend(errs, fmt.Errorf("local_port: %s must be a valid port", p.config.LocalPort))
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}
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} else {
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p.config.LocalPort = "0"
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}
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if len(p.config.InventoryDirectory) > 0 {
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err = validateInventoryDirectoryConfig(p.config.InventoryDirectory)
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if err != nil {
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log.Println(p.config.InventoryDirectory, "does not exist")
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errs = packer.MultiErrorAppend(errs, err)
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}
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}
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if !p.config.SkipVersionCheck {
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err = p.getVersion()
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if err != nil {
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errs = packer.MultiErrorAppend(errs, err)
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}
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}
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if p.config.User == "" {
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usr, err := user.Current()
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if err != nil {
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errs = packer.MultiErrorAppend(errs, err)
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} else {
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p.config.User = usr.Username
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}
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}
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if p.config.User == "" {
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errs = packer.MultiErrorAppend(errs, fmt.Errorf("user: could not determine current user from environment."))
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}
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if errs != nil && len(errs.Errors) > 0 {
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return errs
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}
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return nil
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}
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func (p *Provisioner) getVersion() error {
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out, err := exec.Command(p.config.Command, "--version").Output()
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if err != nil {
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return fmt.Errorf(
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"Error running \"%s --version\": %s", p.config.Command, err.Error())
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}
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versionRe := regexp.MustCompile(`\w (\d+\.\d+[.\d+]*)`)
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matches := versionRe.FindStringSubmatch(string(out))
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if matches == nil {
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return fmt.Errorf(
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"Could not find %s version in output:\n%s", p.config.Command, string(out))
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}
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version := matches[1]
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log.Printf("%s version: %s", p.config.Command, version)
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p.ansibleVersion = version
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majVer, err := strconv.ParseUint(strings.Split(version, ".")[0], 10, 0)
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if err != nil {
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return fmt.Errorf("Could not parse major version from \"%s\".", version)
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}
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p.ansibleMajVersion = uint(majVer)
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return nil
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}
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func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
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ui.Say("Provisioning with Ansible...")
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// Interpolate env vars to check for .WinRMPassword
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p.config.ctx.Data = &PassthroughTemplate{
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WinRMPassword: getWinRMPassword(p.config.PackerBuildName),
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}
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for i, envVar := range p.config.AnsibleEnvVars {
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envVar, err := interpolate.Render(envVar, &p.config.ctx)
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if err != nil {
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return fmt.Errorf("Could not interpolate ansible env vars: %s", err)
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}
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p.config.AnsibleEnvVars[i] = envVar
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}
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// Interpolate extra vars to check for .WinRMPassword
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for i, arg := range p.config.ExtraArguments {
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arg, err := interpolate.Render(arg, &p.config.ctx)
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if err != nil {
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return fmt.Errorf("Could not interpolate ansible env vars: %s", err)
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}
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p.config.ExtraArguments[i] = arg
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}
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k, err := newUserKey(p.config.SSHAuthorizedKeyFile)
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if err != nil {
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return err
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}
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hostSigner, err := newSigner(p.config.SSHHostKeyFile)
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// Remove the private key file
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if len(k.privKeyFile) > 0 {
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defer os.Remove(k.privKeyFile)
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}
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keyChecker := ssh.CertChecker{
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UserKeyFallback: func(conn ssh.ConnMetadata, pubKey ssh.PublicKey) (*ssh.Permissions, error) {
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if user := conn.User(); user != p.config.User {
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return nil, errors.New(fmt.Sprintf("authentication failed: %s is not a valid user", user))
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}
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if !bytes.Equal(k.Marshal(), pubKey.Marshal()) {
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return nil, errors.New("authentication failed: unauthorized key")
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}
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return nil, nil
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},
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}
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config := &ssh.ServerConfig{
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AuthLogCallback: func(conn ssh.ConnMetadata, method string, err error) {
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log.Printf("authentication attempt from %s to %s as %s using %s", conn.RemoteAddr(), conn.LocalAddr(), conn.User(), method)
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},
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PublicKeyCallback: keyChecker.Authenticate,
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//NoClientAuth: true,
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}
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config.AddHostKey(hostSigner)
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localListener, err := func() (net.Listener, error) {
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port, err := strconv.ParseUint(p.config.LocalPort, 10, 16)
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if err != nil {
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return nil, err
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}
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tries := 1
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if port != 0 {
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tries = 10
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}
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for i := 0; i < tries; i++ {
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l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", port))
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port++
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if err != nil {
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ui.Say(err.Error())
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continue
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}
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_, p.config.LocalPort, err = net.SplitHostPort(l.Addr().String())
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if err != nil {
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ui.Say(err.Error())
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continue
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}
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return l, nil
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}
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return nil, errors.New("Error setting up SSH proxy connection")
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}()
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if err != nil {
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return err
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}
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ui = newUi(ui)
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p.adapter = newAdapter(p.done, localListener, config, p.config.SFTPCmd, ui, comm)
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defer func() {
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log.Print("shutting down the SSH proxy")
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close(p.done)
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p.adapter.Shutdown()
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}()
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go p.adapter.Serve()
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if len(p.config.InventoryFile) == 0 {
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tf, err := ioutil.TempFile(p.config.InventoryDirectory, "packer-provisioner-ansible")
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if err != nil {
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return fmt.Errorf("Error preparing inventory file: %s", err)
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}
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defer os.Remove(tf.Name())
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host := fmt.Sprintf("%s ansible_host=127.0.0.1 ansible_user=%s ansible_port=%s\n",
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p.config.HostAlias, p.config.User, p.config.LocalPort)
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if p.ansibleMajVersion < 2 {
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host = fmt.Sprintf("%s ansible_ssh_host=127.0.0.1 ansible_ssh_user=%s ansible_ssh_port=%s\n",
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p.config.HostAlias, p.config.User, p.config.LocalPort)
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}
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w := bufio.NewWriter(tf)
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w.WriteString(host)
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for _, group := range p.config.Groups {
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fmt.Fprintf(w, "[%s]\n%s", group, host)
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}
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for _, group := range p.config.EmptyGroups {
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fmt.Fprintf(w, "[%s]\n", group)
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}
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if err := w.Flush(); err != nil {
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tf.Close()
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return fmt.Errorf("Error preparing inventory file: %s", err)
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}
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tf.Close()
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p.config.InventoryFile = tf.Name()
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defer func() {
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p.config.InventoryFile = ""
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}()
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}
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if err := p.executeAnsible(ui, comm, k.privKeyFile); err != nil {
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return fmt.Errorf("Error executing Ansible: %s", err)
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}
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return nil
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}
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func (p *Provisioner) Cancel() {
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if p.done != nil {
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close(p.done)
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}
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if p.adapter != nil {
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p.adapter.Shutdown()
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}
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os.Exit(0)
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}
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func (p *Provisioner) executeAnsible(ui packer.Ui, comm packer.Communicator, privKeyFile string) error {
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playbook, _ := filepath.Abs(p.config.PlaybookFile)
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inventory := p.config.InventoryFile
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if len(p.config.InventoryDirectory) > 0 {
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inventory = p.config.InventoryDirectory
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}
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var envvars []string
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args := []string{"--extra-vars", fmt.Sprintf("packer_build_name=%s packer_builder_type=%s",
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p.config.PackerBuildName, p.config.PackerBuilderType),
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"-i", inventory, playbook}
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if len(privKeyFile) > 0 {
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// Changed this from using --private-key to supplying -e ansible_ssh_private_key_file as the latter
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// is treated as a highest priority variable, and thus prevents overriding by dynamic variables
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// as seen in #5852
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// args = append(args, "--private-key", privKeyFile)
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args = append(args, "-e", fmt.Sprintf("ansible_ssh_private_key_file=%s", privKeyFile))
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}
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// expose packer_http_addr extra variable
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httpAddr := common.GetHTTPAddr()
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if httpAddr != "" {
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args = append(args, "--extra-vars", fmt.Sprintf("packer_http_addr=%s", httpAddr))
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}
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args = append(args, p.config.ExtraArguments...)
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if len(p.config.AnsibleEnvVars) > 0 {
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envvars = append(envvars, p.config.AnsibleEnvVars...)
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}
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cmd := exec.Command(p.config.Command, args...)
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cmd.Env = os.Environ()
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if len(envvars) > 0 {
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cmd.Env = append(cmd.Env, envvars...)
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}
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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return err
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}
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stderr, err := cmd.StderrPipe()
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if err != nil {
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return err
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}
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wg := sync.WaitGroup{}
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repeat := func(r io.ReadCloser) {
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reader := bufio.NewReader(r)
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for {
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line, err := reader.ReadString('\n')
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if line != "" {
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line = strings.TrimRightFunc(line, unicode.IsSpace)
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ui.Message(line)
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}
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if err != nil {
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if err == io.EOF {
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break
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} else {
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ui.Error(err.Error())
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break
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}
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}
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}
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wg.Done()
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}
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wg.Add(2)
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go repeat(stdout)
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go repeat(stderr)
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// remove winrm password from command, if it's been added
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flattenedCmd := strings.Join(cmd.Args, " ")
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sanitized := flattenedCmd
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if len(getWinRMPassword(p.config.PackerBuildName)) > 0 {
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sanitized = strings.Replace(sanitized,
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getWinRMPassword(p.config.PackerBuildName), "*****", -1)
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}
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ui.Say(fmt.Sprintf("Executing Ansible: %s", sanitized))
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if err := cmd.Start(); err != nil {
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return err
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}
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wg.Wait()
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err = cmd.Wait()
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if err != nil {
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return fmt.Errorf("Non-zero exit status: %s", err)
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}
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return nil
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}
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func validateFileConfig(name string, config string, req bool) error {
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if req {
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if name == "" {
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return fmt.Errorf("%s must be specified.", config)
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}
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}
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info, err := os.Stat(name)
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if err != nil {
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return fmt.Errorf("%s: %s is invalid: %s", config, name, err)
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} else if info.IsDir() {
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return fmt.Errorf("%s: %s must point to a file", config, name)
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}
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return nil
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}
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func validateInventoryDirectoryConfig(name string) error {
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info, err := os.Stat(name)
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if err != nil {
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return fmt.Errorf("inventory_directory: %s is invalid: %s", name, err)
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} else if !info.IsDir() {
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return fmt.Errorf("inventory_directory: %s must point to a directory", name)
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}
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return nil
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}
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type userKey struct {
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ssh.PublicKey
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privKeyFile string
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}
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func newUserKey(pubKeyFile string) (*userKey, error) {
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userKey := new(userKey)
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if len(pubKeyFile) > 0 {
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pubKeyBytes, err := ioutil.ReadFile(pubKeyFile)
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if err != nil {
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return nil, errors.New("Failed to read public key")
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}
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userKey.PublicKey, _, _, _, err = ssh.ParseAuthorizedKey(pubKeyBytes)
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if err != nil {
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return nil, errors.New("Failed to parse authorized key")
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}
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return userKey, nil
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}
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key, err := rsa.GenerateKey(rand.Reader, 2048)
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if err != nil {
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return nil, errors.New("Failed to generate key pair")
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}
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userKey.PublicKey, err = ssh.NewPublicKey(key.Public())
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if err != nil {
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return nil, errors.New("Failed to extract public key from generated key pair")
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}
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// To support Ansible calling back to us we need to write
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// this file down
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privateKeyDer := x509.MarshalPKCS1PrivateKey(key)
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privateKeyBlock := pem.Block{
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Type: "RSA PRIVATE KEY",
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Headers: nil,
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Bytes: privateKeyDer,
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}
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tf, err := ioutil.TempFile("", "ansible-key")
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if err != nil {
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return nil, errors.New("failed to create temp file for generated key")
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}
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_, err = tf.Write(pem.EncodeToMemory(&privateKeyBlock))
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if err != nil {
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return nil, errors.New("failed to write private key to temp file")
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}
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err = tf.Close()
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if err != nil {
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return nil, errors.New("failed to close private key temp file")
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}
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userKey.privKeyFile = tf.Name()
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return userKey, nil
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}
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type signer struct {
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ssh.Signer
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}
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func newSigner(privKeyFile string) (*signer, error) {
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signer := new(signer)
|
|
|
|
if len(privKeyFile) > 0 {
|
|
privateBytes, err := ioutil.ReadFile(privKeyFile)
|
|
if err != nil {
|
|
return nil, errors.New("Failed to load private host key")
|
|
}
|
|
|
|
signer.Signer, err = ssh.ParsePrivateKey(privateBytes)
|
|
if err != nil {
|
|
return nil, errors.New("Failed to parse private host key")
|
|
}
|
|
|
|
return signer, nil
|
|
}
|
|
|
|
key, err := rsa.GenerateKey(rand.Reader, 2048)
|
|
if err != nil {
|
|
return nil, errors.New("Failed to generate server key pair")
|
|
}
|
|
|
|
signer.Signer, err = ssh.NewSignerFromKey(key)
|
|
if err != nil {
|
|
return nil, errors.New("Failed to extract private key from generated key pair")
|
|
}
|
|
|
|
return signer, nil
|
|
}
|
|
|
|
func getWinRMPassword(buildName string) string {
|
|
winRMPass, _ := commonhelper.RetrieveSharedState("winrm_password", buildName)
|
|
return winRMPass
|
|
}
|
|
|
|
// Ui provides concurrency-safe access to packer.Ui.
|
|
type Ui struct {
|
|
sem chan int
|
|
ui packer.Ui
|
|
}
|
|
|
|
func newUi(ui packer.Ui) packer.Ui {
|
|
return &Ui{sem: make(chan int, 1), ui: ui}
|
|
}
|
|
|
|
func (ui *Ui) Ask(s string) (string, error) {
|
|
ui.sem <- 1
|
|
ret, err := ui.ui.Ask(s)
|
|
<-ui.sem
|
|
|
|
return ret, err
|
|
}
|
|
|
|
func (ui *Ui) Say(s string) {
|
|
ui.sem <- 1
|
|
ui.ui.Say(s)
|
|
<-ui.sem
|
|
}
|
|
|
|
func (ui *Ui) Message(s string) {
|
|
ui.sem <- 1
|
|
ui.ui.Message(s)
|
|
<-ui.sem
|
|
}
|
|
|
|
func (ui *Ui) Error(s string) {
|
|
ui.sem <- 1
|
|
ui.ui.Error(s)
|
|
<-ui.sem
|
|
}
|
|
|
|
func (ui *Ui) Machine(t string, args ...string) {
|
|
ui.sem <- 1
|
|
ui.ui.Machine(t, args...)
|
|
<-ui.sem
|
|
}
|