Link Search Menu Expand Document

Configuration Reference

Configuring lakeFS is done using a YAML configuration file and/or environment variable. The configuration file’s location can be set with the ‘–config’ flag. If not specified, the first file found in the following order will be used:

  1. ./config.yaml
  2. $HOME/lakefs/config.yaml
  3. /etc/lakefs/config.yaml
  4. $HOME/.lakefs.yaml

Configuration items can each be controlled by an environment variable. The variable name will have a prefix of LAKEFS_, followed by the name of the configuration, replacing every ‘.’ with a ‘_’. Example: LAKEFS_LOGGING_LEVEL controls logging.level.

This reference uses . to denote the nesting of values.


  • logging.format (one of ["json", "text"] : "text") - Format to output log message in
  • logging.level (one of ["TRACE", "DEBUG", "INFO", "WARN", "ERROR", "NONE"] : "DEBUG") - Logging level to output
  • logging.audit_log_level (one of ["TRACE", "DEBUG", "INFO", "WARN", "ERROR", "NONE"] : "DEBUG") - Audit logs level to output.

    Note: In case you configure this field to be lower than the main logger level, you won’t be able to get the audit logs

  • logging.output (string : "-") - A path or paths to write logs to. A - means the standard output, = means the standard error.
  • logging.file_max_size_mb (int : 100) - Output file maximum size in megabytes.
  • logging.files_keep (int : 0) - Number of log files to keep, default is all.
  • actions.enabled (bool : true) - Setting this to false will block hooks from being executed
  • database.connection_string (string : "postgres://localhost:5432/postgres?sslmode=disable") - PostgreSQL connection string to use
  • database.max_open_connections (int : 25) - Maximum number of open connections to the database
  • database.max_idle_connections (int : 25) - Sets the maximum number of connections in the idle connection pool
  • database.connection_max_lifetime (duration : 5m) - Sets the maximum amount of time a connection may be reused

    Note: Deprecated - See database section

  • database - Configuration section for the lakeFS key-value store database
    • database.type (string ["postgres"|"dynamodb"|"local"] : ) - lakeFS database type
    • database.postgres - Configuration section when using database.type="postgres"
      • database.postgres.connection_string (string : "postgres://localhost:5432/postgres?sslmode=disable") - PostgreSQL connection string to use
      • database.postgres.max_open_connections (int : 25) - Maximum number of open connections to the database
      • database.postgres.max_idle_connections (int : 25) - Maximum number of connections in the idle connection pool
      • database.postgres.connection_max_lifetime (duration : 5m) - Sets the maximum amount of time a connection may be reused (valid units: ns|us|ms|s|m|h)
    • database.dynamodb - Configuration section when using database.type="dynamodb"
      • database.dynamodb.table_name (string : "kvstore") - Table used to store the data
      • database.dynamodb.read_capacity_units (int : 1000) - Read capacity units, measured in requests per second
      • database.dynamodb.write_capacity_units (int : 1000) - Write capacity units, measured in requests per second
      • database.dynamodb.scan_limit (int : ) - Maximal number of items per page during scan operation

        Note: Refer to the following AWS documentation for further information

      • database.dynamodb.endpoint (string : ) - Endpoint URL for database instance
      • database.dynamodb.aws_region (string : ) - AWS Region of database instance
      • database.dynamodb.aws_profile (string : ) - AWS named profile to use
      • database.dynamodb.aws_access_key_id (string : ) - AWS access key ID
      • database.dynamodb.aws_secret_access_key (string : ) - AWS secret access key
      • Note: endpoint aws_region aws_access_key_id aws_secret_access_key are not required and used mainly for experimental purposes when working with DynamoDB with different AWS credentials.
    • database.local - Configuration section when using database.type="local"
      • database.local.path (string : "~/lakefs/metadata") - Local path on the filesystem to store embedded KV metadata, like branches and uncommitted entries
      • database.local.sync_writes (bool: true) - Ensure each write is written to the disk. Disable to increase performance
      • database.local.prefetch_size (int: 256) - How many items to prefetch when iterating over embedded KV records
      • database.local.enable_logging (bool: false) - Enable trace logging for local driver
  • listen_address (string : "") - A <host>:<port> structured string representing the address to listen on
  • auth.cache.enabled (bool : true) - Whether to cache access credentials and user policies in-memory. Can greatly improve throughput when enabled.
  • auth.cache.size (int : 1024) - How many items to store in the auth cache. Systems with a very high user count should use a larger value at the expense of ~1kb of memory per cached user.
  • auth.cache.ttl (time duration : "20s") - How long to store an item in the auth cache. Using a higher value reduces load on the database, but will cause changes longer to take effect for cached users.
  • auth.cache.jitter (time duration : "3s") - A random amount of time between 0 and this value is added to each item’s TTL. This is done to avoid a large bulk of keys expiring at once and overwhelming the database.
  • auth.encrypt.secret_key (string : required) - A random (cryptographically safe) generated string that is used for encryption and HMAC signing
  • auth.cookie_domain (string : "") - Domain attribute to set the access_token cookie on (the default is an empty string which defaults to the same host that sets the cookie)
  • auth.api.endpoint (string: https://external.service/api/v1) - URL to external Authorization Service described at authorization.yml;
  • auth.api.token (string: eyJhbGciOiJIUzI1NiIsInR5...) - API token used to authenticate requests to api endpoint

    Note: It is best to keep this somewhere safe such as KMS or Hashicorp Vault, and provide it to the system at run time

  • auth.ldap.server_endpoint (string : required) - If specified, also authenticate users via this LDAP server.
  • auth.ldap.bind_dn (string : required) - Use this DN to bind lakeFS on the LDAP server for searching for users.
  • auth.ldap.bind_password (string : ) - If set, use this password for binding bind_dn.
  • auth.ldap.username_attribute (string : required) - Attribute holding login username on LDAP users, e.g. cn or uid.
  • auth.ldap.user_base_dn (string : required) - Base DN for searching for users. Search looks for users in the subtree below this.
  • auth.ldap.default_user_group (string : ) - Create all LDAP users in this group. Defaults to Viewers.
  • auth.ldap.user_filter (string : ) - Additional filter for users.
  • auth.oidc.enabled (bool : false) - Set to true to enable authentication with an external OIDC provider.
  • auth.oidc.is_default_login (bool : false) - If true, the lakeFS login page will redirect to the external provider by default.
  • auth.oidc.client_id (string : ) - OIDC client ID.
  • auth.oidc.client_secret (string : ) - OIDC client secret.
  • auth.oidc.url (string : ) - The base URL of your OIDC compatible identity provider.
  • auth.oidc.callback_base_url (string : ) - The scheme, host and port of your lakeFS installation. After authenticating, your identity provider will redirect you to a URL under this base.
  • auth.oidc.default_initial_groups (string[] : []) - By default, OIDC users will be assigned to these groups
  • auth.oidc.initial_groups_claim_name (string[] : []) - Use this claim from the ID token to provide the initial group for new users.
  • auth.oidc.friendly_name_claim_name (string[] : ) - If specified, the value from the claim with this name will be used as the user’s display name.
  • auth.oidc.authorize_endpoint_query_parameters (map[string]string : ) - Add these parameters when calling the provider’s /authorize endpoint
  • auth.oidc.validate_id_token_claims (map[string]string : ) - When a user tries to access lakeFS, validate that the ID token contains these claims with the corresponding values.
  • blockstore.type (one of ["local", "s3", "gs", "azure", "mem"] : required). Block adapter to use. This controls where the underlying data will be stored
  • blockstore.default_namespace_prefix (string : ) - Use this to help your users choose a storage namespace for their repositories. If specified, the storage namespace will be filled with this default value as a prefix when creating a repository from the UI. The user may still change it to something else.
  • blockstore.local.path (string: "~/lakefs/data") - When using the local Block Adapter, which directory to store files in
  • (string : ) - If specified will be used as a file path of the JSON file that contains your Google service account key
  • (string : ) - If specified will be used as JSON string that contains your Google service account key (when credentials_file is not set)
  • (string : ) - If specified, will be used as the Azure storage account
  • (string : ) - If specified, will be used as the Azure storage access key
  • (one of ["msi", "access-key"]: "access-key" ) - Authentication method to use (msi is used for Azure AD authentication).
  • blockstore.s3.region (string : "us-east-1") - Default region for lakeFS to use when interacting with S3.
  • blockstore.s3.profile (string : ) - If specified, will be used as a named credentials profile
  • blockstore.s3.credentials_file (string : ) - If specified, will be used as a credentials file
  • blockstore.s3.credentials.access_key_id (string : ) - If specified, will be used as a static set of credential
  • blockstore.s3.credentials.secret_access_key (string : ) - If specified, will be used as a static set of credential
  • blockstore.s3.credentials.session_token (string : ) - If specified, will be used as a static session token
  • blockstore.s3.endpoint (string : ) - If specified, custom endpoint for the AWS S3 API (https://s3_compatible_service_endpoint:port)
  • blockstore.s3.force_path_style (bool : false) - When true, use path-style S3 URLs (https:/// instead of https://.)
  • blockstore.s3.streaming_chunk_size (int : 1048576) - Object chunk size to buffer before streaming to blockstore (use a lower value for less reliable networks). Minimum is 8192.
  • blockstore.s3.streaming_chunk_timeout (time duration : "60s") - Per object chunk timeout for blockstore streaming operations (use a larger value for less reliable networks).
  • blockstore.s3.discover_bucket_region (bool : true) - (Can be turned off if the underlying S3 bucket doesn’t support the GetBucketRegion API).
  • blockstore.s3.skip_verify_certificate_test_only (boolean: false) - Skip certificate verification while connecting to the storage endpoint. Should be used only for testing.
  • committed.local_cache - an object describing the local (on-disk) cache of metadata from permanent storage:
    • committed.local_cache.size_bytes (int : 1073741824) - bytes for local cache to use on disk. The cache may use more storage for short periods of time.
    • committed.local_cache.dir (string, ~/lakefs/local_tier) - directory to store local cache.
    • committed.local_cache.range_proportion (float : 0.9) - proportion of local cache to use for storing ranges (leaves of committed metadata storage).
    • committed.local_cache.range.open_readers (int : 500) - maximal number of unused open SSTable readers to keep for ranges.
    • committed.local_cache.range.num_shards (int : 30) - sharding factor for open SSTable readers for ranges. Should be at least sqrt(committed.local_cache.range.open_readers).
    • committed.local_cache.metarange_proportion (float : 0.1) - proportion of local cache to use for storing metaranges (roots of committed metadata storage).
    • committed.local_cache.metarange.open_readers (int : 50) - maximal number of unused open SSTable readers to keep for metaranges.
    • committed.local_cache.metarange.num_shards (int : 10) - sharding factor for open SSTable readers for metaranges. Should be at least sqrt(committed.local_cache.metarange.open_readers).
  • committed.block_storage_prefix (string : _lakefs) - Prefix for metadata file storage in each repository’s storage namespace
  • committed.permanent.min_range_size_bytes (int : 0) - Smallest allowable range in metadata. Increase to somewhat reduce random access time on committed metadata, at the cost of increased committed metadata storage cost.
  • committed.permanent.max_range_size_bytes (int : 20971520) - Largest allowable range in metadata. Should be close to the size at which fetching from remote storage becomes linear.
  • committed.permanent.range_raggedness_entries (int : 50_000) - Average number of object pointers to store in each range (subject to min_range_size_bytes and max_range_size_bytes).
  • committed.sstable.memory.cache_size_bytes (int : 200_000_000) - maximal size of in-memory cache used for each SSTable reader.
  • email.smtp_host (string) - A string representing the URL of the SMTP host.
  • email.smtp_port (int) - An integer representing the port of the SMTP service (465, 587, 993, 25 are some standard ports)
  • email.use_ssl (bool : false) - Use SSL connection with SMTP host.
  • email.username (string) - A string representing the username of the specific account at the SMTP. It’s recommended to provide this value at runtime from a secret vault of some sort.
  • email.password (string) - A string representing the password of the account. It’s recommended to provide this value at runtime from a secret vault of some sort.
  • email.local_name (string) - A string representing the hostname sent to the SMTP server with the HELO command. By default, “localhost” is sent.
  • email.sender (string) - A string representing the email account which is set as the sender.
  • email.limit_every_duration (duration : 1m) - The average time between sending emails. If zero is entered, there is no limit to the amount of emails that can be sent.
  • email.burst (int: 10) - Maximal burst of emails before applying limit_every_duration. The zero value means no burst and therefore no emails can be sent.
  • email.lakefs_base_url (string : "http://localhost:8000") - A string representing the base lakefs endpoint to be directed to when emails are sent inviting users, reseting passwords etc.
  • gateways.s3.domain_name (string : "") - a FQDN representing the S3 endpoint used by S3 clients to call this server (* always resolves to, useful for local development, if using virtual-host addressing.
  • gateways.s3.region (string : "us-east-1") - AWS region we’re pretending to be in, it should match the region configuration used in AWS SDK clients
  • gateways.s3.fallback_url (string) - If specified, requests with a non-existing repository will be forwarded to this URL. This can be useful for using lakeFS side-by-side with S3, with the URL pointing at an S3Proxy instance.
  • stats.enabled (bool : true) - Whether to periodically collect anonymous usage statistics
  • security.audit_check_interval (duration : 12h) - Duration in which we check for security audit.
  • ui.enable (bool: true) - Whether to server the embedded UI from the binary

Using Environment Variables

All the configuration variables can be set or overridden using environment variables. To set an environment variable, prepend LAKEFS_ to its name, convert it to upper case, and replace . with _:

For example, logging.format becomes LAKEFS_LOGGING_FORMAT, blockstore.s3.region becomes LAKEFS_BLOCKSTORE_S3_REGION, etc.

Example: Local Development with PostgreSQL database

listen_address: ""

  type: "postgres"
    connection_string: "postgres://localhost:5432/postgres?sslmode=disable"

  format: text
  level: DEBUG
  output: "-"

    secret_key: "10a718b3f285d89c36e9864494cdd1507f3bc85b342df24736ea81f9a1134bcc09e90b6641"

  type: local
    path: "~/lakefs/dev/data"

    region: us-east-1

Example: AWS Deployment with DynamoDB database

  format: json
  level: WARN
  output: "-"

  type: "dynamodb"
    table_name: "kvstore"

    secret_key: "10a718b3f285d89c36e9864494cdd1507f3bc85b342df24736ea81f9a1134bcc"

  type: s3
    region: us-east-1 # optional, fallback in case discover from bucket is not supported
    credentials_file: /secrets/aws/credentials
    profile: default

Example: Google Storage

  format: json
  level: WARN
  output: "-"

  type: "postgres"
    connection_string: "postgres://"

    secret_key: "10a718b3f285d89c36e9864494cdd1507f3bc85b342df24736ea81f9a1134bcc"

  type: gs
    credentials_file: /secrets/lakefs-service-account.json

Example: MinIO

  format: json
  level: WARN
  output: "-"

  type: "postgres"
    connection_string: "postgres://"

    secret_key: "10a718b3f285d89c36e9864494cdd1507f3bc85b342df24736ea81f9a1134bcc"

  type: s3
    force_path_style: true
    endpoint: http://localhost:9000
    discover_bucket_region: false
      access_key_id: minioadmin
      secret_access_key: minioadmin

Example: Azure blob storage

  format: json
  level: WARN
  output: "-"

  type: "postgres"
    connection_string: "postgres://"

    secret_key: "10a718b3f285d89c36e9864494cdd1507f3bc85b342df24736ea81f9a1134bcc"

  type: azure
    auth_method: access-key
    storage_account: exampleStorageAcount
    storage_access_key: ExampleAcessKeyMD7nkPOWgV7d4BUjzLw==