The operator init command initializes a Vault server. Initialization is the process by which Vault's storage backend is prepared to receive data. Since Vault servers share the same storage backend in HA mode, you only need to initialize one Vault to initialize the storage backend. This command cannot be run against already-initialized Vault cluster.
During initialization, Vault generates a root key, which is stored in the storage backend alongside all other Vault data. The root key itself is encrypted and requires an unseal key to decrypt it.
The default Vault configuration uses Shamir's Secret Sharing to split the root key into a configured number of shards (referred as key shares, or unseal keys). A certain threshold of shards is required to reconstruct the root key, which is then used to decrypt the Vault's encryption key.
Refer to the Seal/Unseal documentation for further details.
Start initialization with the default options:
Initialize, but encrypt the unseal keys with pgp keys:
$ vault operator init \
-key-shares=3 \
-key-threshold=2 \
-pgp-keys="keybase:hashicorp,keybase:jefferai,keybase:sethvargo"
Initialize Auto Unseal with a non-default threshold and number of recovery keys, and encrypt the recovery keys with pgp keys:
$ vault operator init \
-recovery-shares=7 \
-recovery-threshold=4 \
-recovery-pgp-keys="keybase:jeff,keybase:chris,keybase:brian,keybase:calvin,keybase:matthew,keybase:vishal,keybase:nick"
Encrypt the initial root token using a pgp key:
$ vault operator init -root-token-pgp-key="keybase:hashicorp"
The following flags are available in addition to the standard set of flags included on all commands.
Output options-format (string: "") - Print the output in the given format. Valid formats are "table", "json", or "yaml". The default is table. This can also be specified via the VAULT_FORMAT environment variable.-key-shares (int: 5) - Number of key shares to split the generated master key into. This is the number of "unseal keys" to generate. This is aliased as -n.
-key-threshold (int: 3) - Number of key shares required to reconstruct the root key. This must be less than or equal to -key-shares. This is aliased as -t.
-pgp-keys (string: "...") - Comma-separated list of paths to files on disk containing public PGP keys OR a comma-separated list of Keybase usernames using the format keybase:<username>. When supplied, the generated unseal keys will be encrypted and base64-encoded in the order specified in this list. The number of entries must match -key-shares, unless -stored-shares are used.
-root-token-pgp-key (string: "") - Path to a file on disk containing a binary or base64-encoded public PGP key. This can also be specified as a Keybase username using the format keybase:<username>. When supplied, the generated root token will be encrypted and base64-encoded with the given public key.
-status (bool": false) - Print the current initialization status. An exit code of 0 means the Vault is already initialized. An exit code of 1 means an error occurred. An exit code of 2 means the Vault is not initialized.
-consul-auto (bool: false) - Perform automatic service discovery using Consul in HA mode. When all nodes in a Vault HA cluster are registered with Consul, enabling this option will trigger automatic service discovery based on the provided -consul-service value. When Consul is Vault's HA backend, this functionality is automatically enabled. Ensure the proper Consul environment variables are set (CONSUL_HTTP_ADDR, etc). When only one Vault server is discovered, it will be initialized automatically. When more than one Vault server is discovered, they will each be output for selection. The default is false.
-consul-service (string: "vault") - Name of the service in Consul under which the Vault servers are registered.
-recovery-pgp-keys (string: "...") - Behaves like -pgp-keys, but for the recovery key shares. This is only available with Auto Unseal seals (HSM, KMS and Transit seals).
-recovery-shares (int: 5) - Number of key shares to split the recovery key into. This is only available with Auto Unseal seals (HSM, KMS and Transit seals).
-recovery-threshold (int: 3) - Number of key shares required to reconstruct the recovery key. This is only available with Auto Unseal seals (HSM, KMS and Transit seals).
-stored-shares (int: 0) - Number of unseal keys to store on an HSM. This must be equal to -key-shares.
Recovery keys: Refer to the Seal/Unseal documentation to learn more about recovery keys.
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