387 lines
14 KiB
Go
387 lines
14 KiB
Go
package command
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import (
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"fmt"
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"net/url"
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"os"
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"runtime"
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"strings"
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consulapi "github.com/hashicorp/consul/api"
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"github.com/hashicorp/vault/api"
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"github.com/hashicorp/vault/helper/pgpkeys"
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"github.com/hashicorp/vault/meta"
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"github.com/hashicorp/vault/physical"
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)
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// InitCommand is a Command that initializes a new Vault server.
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type InitCommand struct {
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meta.Meta
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}
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func (c *InitCommand) Run(args []string) int {
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var threshold, shares, storedShares, recoveryThreshold, recoveryShares int
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var pgpKeys, recoveryPgpKeys, rootTokenPgpKey pgpkeys.PubKeyFilesFlag
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var auto, check bool
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var consulServiceName string
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flags := c.Meta.FlagSet("init", meta.FlagSetDefault)
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flags.Usage = func() { c.Ui.Error(c.Help()) }
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flags.IntVar(&shares, "key-shares", 5, "")
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flags.IntVar(&threshold, "key-threshold", 3, "")
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flags.IntVar(&storedShares, "stored-shares", 0, "")
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flags.Var(&pgpKeys, "pgp-keys", "")
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flags.Var(&rootTokenPgpKey, "root-token-pgp-key", "")
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flags.IntVar(&recoveryShares, "recovery-shares", 5, "")
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flags.IntVar(&recoveryThreshold, "recovery-threshold", 3, "")
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flags.Var(&recoveryPgpKeys, "recovery-pgp-keys", "")
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flags.BoolVar(&check, "check", false, "")
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flags.BoolVar(&auto, "auto", false, "")
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flags.StringVar(&consulServiceName, "consul-service", physical.DefaultServiceName, "")
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if err := flags.Parse(args); err != nil {
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return 1
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}
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initRequest := &api.InitRequest{
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SecretShares: shares,
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SecretThreshold: threshold,
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StoredShares: storedShares,
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PGPKeys: pgpKeys,
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RecoveryShares: recoveryShares,
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RecoveryThreshold: recoveryThreshold,
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RecoveryPGPKeys: recoveryPgpKeys,
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}
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switch len(rootTokenPgpKey) {
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case 0:
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case 1:
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initRequest.RootTokenPGPKey = rootTokenPgpKey[0]
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default:
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c.Ui.Error("Only one PGP key can be specified for encrypting the root token")
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return 1
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}
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// If running in 'auto' mode, run service discovery based on environment
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// variables of Consul.
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if auto {
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// Create configuration for Consul
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consulConfig := consulapi.DefaultConfig()
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// Create a client to communicate with Consul
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consulClient, err := consulapi.NewClient(consulConfig)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to create Consul client:%v", err))
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return 1
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}
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// Fetch Vault's protocol scheme from the client
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vaultclient, err := c.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to fetch Vault client: %v", err))
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return 1
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}
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if vaultclient.Address() == "" {
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c.Ui.Error("Failed to fetch Vault client address")
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return 1
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}
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clientURL, err := url.Parse(vaultclient.Address())
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to parse Vault address: %v", err))
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return 1
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}
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if clientURL == nil {
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c.Ui.Error("Failed to parse Vault client address")
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return 1
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}
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var uninitializedVaults []string
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var initializedVault string
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// Query the nodes belonging to the cluster
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if services, _, err := consulClient.Catalog().Service(consulServiceName, "", &consulapi.QueryOptions{AllowStale: true}); err == nil {
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Loop:
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for _, service := range services {
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vaultAddress := &url.URL{
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Scheme: clientURL.Scheme,
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Host: fmt.Sprintf("%s:%d", service.ServiceAddress, service.ServicePort),
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}
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// Set VAULT_ADDR to the discovered node
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os.Setenv(api.EnvVaultAddress, vaultAddress.String())
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// Create a client to communicate with the discovered node
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client, err := c.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing client: %v", err))
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return 1
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}
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// Check the initialization status of the discovered node
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inited, err := client.Sys().InitStatus()
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switch {
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case err != nil:
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c.Ui.Error(fmt.Sprintf("Error checking initialization status of discovered node: %+q. Err: %v", vaultAddress.String(), err))
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return 1
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case inited:
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// One of the nodes in the cluster is initialized. Break out.
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initializedVault = vaultAddress.String()
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break Loop
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default:
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// Vault is uninitialized.
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uninitializedVaults = append(uninitializedVaults, vaultAddress.String())
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}
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}
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}
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export := "export"
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quote := "'"
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if runtime.GOOS == "windows" {
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export = "set"
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quote = ""
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}
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if initializedVault != "" {
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vaultURL, err := url.Parse(initializedVault)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to parse Vault address: %+q. Err: %v", initializedVault, err))
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}
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c.Ui.Output(fmt.Sprintf("Discovered an initialized Vault node at %+q, using Consul service name %+q", vaultURL.String(), consulServiceName))
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c.Ui.Output("\nSet the following environment variable to operate on the discovered Vault:\n")
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c.Ui.Output(fmt.Sprintf("\t%s VAULT_ADDR=%s%s%s", export, quote, vaultURL.String(), quote))
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return 0
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}
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switch len(uninitializedVaults) {
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case 0:
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c.Ui.Error(fmt.Sprintf("Failed to discover Vault nodes using Consul service name %+q", consulServiceName))
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return 1
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case 1:
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// There was only one node found in the Vault cluster and it
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// was uninitialized.
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vaultURL, err := url.Parse(uninitializedVaults[0])
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to parse Vault address: %+q. Err: %v", uninitializedVaults[0], err))
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}
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// Set the VAULT_ADDR to the discovered node. This will ensure
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// that the client created will operate on the discovered node.
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os.Setenv(api.EnvVaultAddress, vaultURL.String())
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// Let the client know that initialization is perfomed on the
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// discovered node.
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c.Ui.Output(fmt.Sprintf("Discovered Vault at %+q using Consul service name %+q\n", vaultURL.String(), consulServiceName))
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// Attempt initializing it
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ret := c.runInit(check, initRequest)
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// Regardless of success or failure, instruct client to update VAULT_ADDR
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c.Ui.Output("\nSet the following environment variable to operate on the discovered Vault:\n")
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c.Ui.Output(fmt.Sprintf("\t%s VAULT_ADDR=%s%s%s", export, quote, vaultURL.String(), quote))
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return ret
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default:
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// If more than one Vault node were discovered, print out all of them,
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// requiring the client to update VAULT_ADDR and to run init again.
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c.Ui.Output(fmt.Sprintf("Discovered more than one uninitialized Vaults using Consul service name %+q\n", consulServiceName))
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c.Ui.Output("To initialize these Vaults, set any *one* of the following environment variables and run 'vault init':")
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// Print valid commands to make setting the variables easier
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for _, vaultNode := range uninitializedVaults {
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vaultURL, err := url.Parse(vaultNode)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to parse Vault address: %+q. Err: %v", vaultNode, err))
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}
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c.Ui.Output(fmt.Sprintf("\t%s VAULT_ADDR=%s%s%s", export, quote, vaultURL.String(), quote))
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}
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return 0
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}
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}
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return c.runInit(check, initRequest)
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}
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func (c *InitCommand) runInit(check bool, initRequest *api.InitRequest) int {
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client, err := c.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf(
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"Error initializing client: %s", err))
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return 1
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}
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if check {
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return c.checkStatus(client)
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}
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resp, err := client.Sys().Init(initRequest)
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if err != nil {
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c.Ui.Error(fmt.Sprintf(
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"Error initializing Vault: %s", err))
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return 1
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}
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for i, key := range resp.Keys {
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if resp.KeysB64 != nil && len(resp.KeysB64) == len(resp.Keys) {
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c.Ui.Output(fmt.Sprintf("Unseal Key %d: %s", i+1, resp.KeysB64[i]))
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} else {
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c.Ui.Output(fmt.Sprintf("Unseal Key %d: %s", i+1, key))
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}
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}
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for i, key := range resp.RecoveryKeys {
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if resp.RecoveryKeysB64 != nil && len(resp.RecoveryKeysB64) == len(resp.RecoveryKeys) {
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c.Ui.Output(fmt.Sprintf("Recovery Key %d: %s", i+1, resp.RecoveryKeysB64[i]))
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} else {
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c.Ui.Output(fmt.Sprintf("Recovery Key %d: %s", i+1, key))
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}
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}
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c.Ui.Output(fmt.Sprintf("Initial Root Token: %s", resp.RootToken))
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if initRequest.StoredShares < 1 {
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c.Ui.Output(fmt.Sprintf(
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"\n"+
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"Vault initialized with %d keys and a key threshold of %d. Please\n"+
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"securely distribute the above keys. When the Vault is re-sealed,\n"+
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"restarted, or stopped, you must provide at least %d of these keys\n"+
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"to unseal it again.\n\n"+
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"Vault does not store the master key. Without at least %d keys,\n"+
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"your Vault will remain permanently sealed.",
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initRequest.SecretShares,
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initRequest.SecretThreshold,
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initRequest.SecretThreshold,
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initRequest.SecretThreshold,
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))
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} else {
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c.Ui.Output(
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"\n" +
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"Vault initialized successfully.",
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)
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}
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if len(resp.RecoveryKeys) > 0 {
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c.Ui.Output(fmt.Sprintf(
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"\n"+
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"Recovery key initialized with %d keys and a key threshold of %d. Please\n"+
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"securely distribute the above keys.",
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initRequest.RecoveryShares,
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initRequest.RecoveryThreshold,
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))
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}
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return 0
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}
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func (c *InitCommand) checkStatus(client *api.Client) int {
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inited, err := client.Sys().InitStatus()
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switch {
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case err != nil:
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c.Ui.Error(fmt.Sprintf(
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"Error checking initialization status: %s", err))
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return 1
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case inited:
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c.Ui.Output("Vault has been initialized")
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return 0
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default:
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c.Ui.Output("Vault is not initialized")
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return 2
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}
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}
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func (c *InitCommand) Synopsis() string {
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return "Initialize a new Vault server"
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}
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func (c *InitCommand) Help() string {
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helpText := `
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Usage: vault init [options]
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Initialize a new Vault server.
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This command connects to a Vault server and initializes it for the
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first time. This sets up the initial set of master keys and sets up the
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backend data store structure.
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This command can't be called on an already-initialized Vault.
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General Options:
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` + meta.GeneralOptionsUsage() + `
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Init Options:
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-check Don't actually initialize, just check if Vault is
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already initialized. A return code of 0 means Vault
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is initialized; a return code of 2 means Vault is not
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initialized; a return code of 1 means an error was
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encountered.
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-key-shares=5 The number of key shares to split the master key
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into.
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-key-threshold=3 The number of key shares required to reconstruct
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the master key.
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-stored-shares=0 The number of unseal keys to store. Only used with
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Vault HSM. Must currently be equivalent to the
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number of shares.
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-pgp-keys If provided, must be a comma-separated list of
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files on disk containing binary- or base64-format
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public PGP keys, or Keybase usernames specified as
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"keybase:<username>". The output unseal keys will
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be encrypted and base64-encoded, in order, with the
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given public keys. If you want to use them with the
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'vault unseal' command, you will need to base64-
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decode and decrypt; this will be the plaintext
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unseal key. When 'stored-shares' are not used, the
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number of entries in this field must match 'key-shares'.
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When 'stored-shares' are used, the number of entries
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should match the difference between 'key-shares'
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and 'stored-shares'.
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-root-token-pgp-key If provided, a file on disk with a binary- or
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base64-format public PGP key, or a Keybase username
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specified as "keybase:<username>". The output root
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token will be encrypted and base64-encoded, in
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order, with the given public key. You will need
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to base64-decode and decrypt the result.
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-recovery-shares=5 The number of key shares to split the recovery key
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into. Only used with Vault HSM.
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-recovery-threshold=3 The number of key shares required to reconstruct
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the recovery key. Only used with Vault HSM.
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-recovery-pgp-keys If provided, behaves like "pgp-keys" but for the
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recovery key shares. Only used with Vault HSM.
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-auto If set, performs service discovery using Consul.
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When all the nodes of a Vault cluster are
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registered with Consul, setting this flag will
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trigger service discovery using the service name
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with which Vault nodes are registered. This option
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works well when each Vault cluster is registered
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under a unique service name. Note that, when Consul
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is serving as Vault's HA backend, Vault nodes are
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registered with Consul by default. The service name
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can be changed using 'consul-service' flag. Ensure
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that environment variables required to communicate
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with Consul, like (CONSUL_HTTP_ADDR,
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CONSUL_HTTP_TOKEN, CONSUL_HTTP_SSL, et al) are
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properly set. When only one Vault node is
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discovered, it will be initialized and when more
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than one Vault node is discovered, they will be
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output for easy selection.
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-consul-service Service name under which all the nodes of a Vault
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cluster are registered with Consul. Note that, when
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Vault uses Consul as its HA backend, by default,
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Vault will register itself as a service with Consul
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with the service name "vault". This name can be
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modified in Vault's configuration file, using the
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"service" option for the Consul backend.
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`
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return strings.TrimSpace(helpText)
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}
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