This document is for power users of the Notary client who want to facilitate CLI interaction or specify custom options.
The configuration file for Notary client normally resides at ~/.notary/config.json
, but the path to a different configuration file can be specified using the -c
or --configFile
command line flag.
In addition to the configuration file format, see the optional password environment variables that the Notary client can take for ease of use.
Here is a full client configuration file example; click on the top level JSON keys to learn more about the configuration section corresponding to that key:
{
"trust_dir" : "~/.docker/trust",
"remote_server": {
"url": "https://my-notary-server.my-private-registry.com",
"root_ca": "./fixtures/root-ca.crt",
"tls_client_cert": "./fixtures/secure.example.com.crt",
"tls_client_key": "./fixtures/secure.example.com.crt"
},
"trust_pinning": {
"certs": {
"docker.com/notary": ["49cf5c6404a35fa41d5a5aa2ce539dfee0d7a2176d0da488914a38603b1f4292"]
}
}
}
The trust_dir
specifies the location (as an absolute path or a path relative to the directory of the configuration file) where the TUF metadata and private keys are stored.
This is normally defaults to ~/.notary
, but specifying ~/.docker/trust
facilitates interoperability with content trust.
This option can be overridden with the command line flag --trustDir
.
The remote_server
specifies how to connect to a Notary server to download metadata updates and publish metadata changes.
Remote server example:
"remote_server": {
"url": "https://my-notary-server.my-private-registry.com",
"root_ca": "./fixtures/root-ca.crt",
"tls_client_cert": "./fixtures/secure.example.com.crt",
"tls_client_key": "./fixtures/secure.example.com.crt"
}
Parameter | Required | Description |
---|---|---|
url | no | URL of the Notary server: defaults to https://notary.docker.io This configuration option can be overridden with the command line flag `-s` or `--server`. |
root_ca | no |
The path to the file containing the root CA with which to verify the TLS certificate of the Notary server, for example if it is self-signed. The path is relative to the directory of the configuration file. This configuration option can overridden with the command line flag `--tlscacert`, which would specify a path relative to the current working directory where the Notary client is invoked. |
tls_client_cert | no |
The path to the client certificate to use for mutual TLS with the Notary server. Must be provided along with This configuration option can overridden with the command line flag `--tlscert`, which would specify a path relative to the current working directory where the Notary client is invoked. |
tls_client_key | no |
The path to the client key to use for mutual TLS with the Notary server. Must be provided along with This configuration option can overridden with the command line flag `--tlskey`, which would specify a path relative to the current working directory where the Notary client is invoked. |
The trust_pinning
specifies how to bootstrap trust for the root of a Notary client’s trusted collection.
This section is optional, Notary uses TOFU over HTTPS by default and trust certificates in the downloaded root file.
In this section, one can provide specific certificates to pin to, or a CA to pin to as a root of trust for a GUN. Multiple sections can be specified, but the pinned certificates take highest priority for validation, followed by the pinned CA, followed by TOFUS (TOFU over HTTPS). The diagram below describes this validation flow:
Only one trust pinning option is used to validate a GUN even if multiple sections are specified, and any validation failure results in a failed bootstrapping of the repo.
Parameter | Required | Description |
---|---|---|
certs | no | Mapping of GUN to certificate IDs to pin to. Both are strings in the JSON object. |
ca | no | Mapping of GUN prefixes to filepaths containing the root CA file with which to verify the certificates in the root file. This file can contain multiple root certificates, bundled in separate PEM blocks. The path is relative to the directory of the configuration file. |
disable_tofu | no | Boolean value determining whether to use trust on first use when bootstrapping validation on a collection's root file. This keeps TOFUs on by default. |
The following environment variables containing signing key passphrases can be used to facilitate Notary client CLI interaction. If provided, these passwords are used initially to sign TUF metadata. If the passphrase is incorrect, you are prompted to enter the correct passphrase.
Environment Variable | Description |
---|---|
NOTARY_ROOT_PASSPHRASE | The root/offline key passphrase |
NOTARY_TARGETS_PASSPHRASE | The targets (an online) key passphrase |
NOTARY_SNAPSHOT_PASSPHRASE | The snapshot (an online) key passphrase |
NOTARY_DELEGATION_PASSPHRASE | The delegation (an online) key passphrase |
NOTARY_AUTH | The notary server credentials: <username>:<password> encoded in base64 |
If provided, the passphrase in NOTARY_DELEGATION_PASSPHRASE
is tried for all delegation roles that notary attempts to sign with.
docker, notary, notary-client, notary-server, notary server, notary-signer, notary signer
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Licensed under the Apache License, Version 2.0.
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https://docs.docker.com/notary/reference/client-config/