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etcd-json-schema.md

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JSON schema for etcd cluster configuration

Example JSON config doc:

{
  "endpoints": "https://dev3-9.compose.direct:15182,https://dev3-11.compose.direct:15182",
  "userid": "userid",
  "password": "password",
  "root_prefix": "aka-chroot-or-namespace",
  "certificate_file": "etcd-dev.pem",
  "override_authority": "etcd-development-01",
  "client_key_file": "etcd-client-key.key",
  "client_certificate_file": "etcd-client-cert.crt"
}
  • All attributes apart from endpoints are optional.
  • The root_prefix attribute currently has no effect on clients created via EtcdClientConfig.getClient(). It's included in the configuration for use by application code (to query via EtcdClientConfig.getRootPrefix()). In future full chroot-like functionality at the client level might be supported.
  • certificate_file is the name of a pem-format (public) cert to use for TLS server-auth, either an absolute path or a filename assumed to be in the same directory as the json config file itself.
  • A certificate attribute may be included instead of certificate_file, whose value is an embedded string UTF-8 pem format certificate. This allows a single json doc to hold all of the necessary connection info.
  • client_key_file and client_certificate_file form an optional key/cert pair for TLS client-auth. Either may also be embedded in a similar way by instead including client_key and/or client_certificate string attributes.

    • Note that the private key must be PKCS8-encoded. PKCS1-encoded keys can be converted using openssl:

      openssl pkcs8 -topk8 -nocrypt -in pkcs1_key_file -out pkcs8_key.pem

  • The override_authority attribute is optional and may be used to override the authority used for TLS hostname verification for all endpoints.

Example with embedded (trunctated) TLS cert:

{
  "endpoints": "https://dev3-9.compose.direct:15182,https://dev3-11.compose.direct:15182",
  "userid": "userid",
  "password": "password",
  "root_prefix": "aka-chroot-or-namespace",
  "certificate": "-----BEGIN CERTIFICATE-----\nMIIDaTCCA ... MP0u6J/xasx14IW4A==\n-----END CERTIFICATE-----\n",
  "override_authority": "etcd-development-01"
}