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
swim_broadcast: 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

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