Module cartridge.argparse

Module cartridge.argparse

Gather configuration options.

The module tries to read configuration options from multiple sources and then merge them together according to the priority of the source:

  • –<VARNAME> command line arguments
  • TARANTOOL_<VARNAME> environment variables
  • configuration files

You can specify a configuration file using the –cfg <CONFIG_FILE> option or the TARANTOOL_CFG=<CONFIG_FILE> environment variable.

Configuration files are yaml files, divided into sections like the following:

default:
  memtx_memory: 10000000
  some_option: "default value"
myapp.router:
  memtx_memory: 1024000000
  some_option: "router specific value"

Within the configuration file, argparse looks for multiple matching sections:

  • The section named <APP_NAME>.<INSTANCE_NAME> is parsed first. Application name is derived automatically from the rockspec filename in the project directory. Or it can be can be specified manually with the --app-name command line argument or the TARANTOOL_APP_NAME environment variable. Instance name can be specified the same way, either as –instance-name or TARANTOOL_INSTANCE_NAME .
  • The common <APP_NAME> section is parsed next.
  • Finally, the section [default] with global configuration is parsed with the lowest priority.

Functions

parse ()

Parse command line arguments, environment variables, and configuration files.

Returns:

({argname=value,…})

get_opts (filter)

Filter the results of parsing and cast variables to a given type.

From all configuration options gathered by parse , select only those specified in the filter.

For example, running an application as following:

./init.lua --alias router --memtx-memory 100

results in:

parse()            -> {memtx_memory = "100", alias = "router"}
get_cluster_opts() -> {alias = "router"} -- a string
get_box_opts()     -> {memtx_memory = 100} -- a number

Parameters:

  • filter: ({argname=type,…})

Returns:

({argname=value,…})

get_box_opts ()

Shorthand for get_opts(box_opts) .

get_cluster_opts ()

Shorthand for get_opts(cluster_opts) .

Tables

cluster_opts

Common cartridge.cfg options.

Options which are not listed below (like roles ) can’t be modified with argparse and should be configured in code.

Fields:

  • alias: string
  • workdir: string
  • http_port: number
  • http_enabled: boolean
  • advertise_uri: string
  • cluster_cookie: string
  • console_sock: string
  • auth_enabled: boolean
  • bucket_count: number
  • upgrade_schema: boolean

box_opts

Common [box.cfg](https://www.tarantool.io/en/doc/latest/reference/configuration/) tuning options.

Fields:

  • listen: string
  • memtx_memory: number
  • strip_core: boolean
  • memtx_min_tuple_size: number
  • memtx_max_tuple_size: number
  • slab_alloc_factor: number
  • work_dir: string (deprecated)
  • memtx_dir: string
  • wal_dir: string
  • vinyl_dir: string
  • vinyl_memory: number
  • vinyl_cache: number
  • vinyl_max_tuple_size: number
  • vinyl_read_threads: number
  • vinyl_write_threads: number
  • vinyl_timeout: number
  • vinyl_run_count_per_level: number
  • vinyl_run_size_ratio: number
  • vinyl_range_size: number
  • vinyl_page_size: number
  • vinyl_bloom_fpr: number
  • log: string
  • log_nonblock: boolean
  • log_level: number
  • log_format: string
  • io_collect_interval: number
  • readahead: number
  • snap_io_rate_limit: number
  • too_long_threshold: number
  • wal_mode: string
  • rows_per_wal: number
  • wal_max_size: number
  • wal_dir_rescan_delay: number
  • force_recovery: boolean
  • replication: string
  • instance_uuid: string
  • replicaset_uuid: string
  • custom_proc_title: string
  • pid_file: string
  • background: boolean
  • username: string
  • coredump: boolean
  • checkpoint_interval: number
  • checkpoint_wal_threshold: number
  • checkpoint_count: number
  • read_only: boolean
  • hot_standby: boolean
  • worker_pool_threads: number
  • replication_timeout: number
  • replication_sync_lag: number
  • replication_sync_timeout: number
  • replication_connect_timeout: number
  • replication_connect_quorum: number
  • replication_skip_conflict: boolean
  • feedback_enabled: boolean
  • feedback_host: string
  • feedback_interval: number
  • net_msg_max: number