piston/api/src/config.js

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const fss = require('fs');
const Logger = require('logplease');
const logger = Logger.create('config');
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const options = [
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{
key: 'log_level',
desc: 'Level of data to log',
default: 'INFO',
options: Object.values(Logger.LogLevels),
validators: [
x =>
Object.values(Logger.LogLevels).includes(x) ||
`Log level ${x} does not exist`,
],
},
{
key: 'bind_address',
desc: 'Address to bind REST API on',
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default: '0.0.0.0:2000',
validators: [],
},
{
key: 'data_directory',
desc: 'Absolute path to store all piston related data at',
default: '/piston',
validators: [
x => fss.exists_sync(x) || `Directory ${x} does not exist`,
],
},
{
key: 'runner_uid_min',
desc: 'Minimum uid to use for runner',
default: 1001,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'runner_uid_max',
desc: 'Maximum uid to use for runner',
default: 1500,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'runner_gid_min',
desc: 'Minimum gid to use for runner',
default: 1001,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'runner_gid_max',
desc: 'Maximum gid to use for runner',
default: 1500,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'disable_networking',
desc: 'Set to true to disable networking',
default: true,
parser: x => x === 'true',
validators: [x => typeof x === 'boolean' || `${x} is not a boolean`],
},
{
key: 'output_max_size',
desc: 'Max size of each stdio buffer',
default: 1024,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'max_process_count',
desc: 'Max number of processes per job',
default: 64,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'max_open_files',
desc: 'Max number of open files per job',
default: 2048,
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'max_file_size',
desc: 'Max file size in bytes for a file',
default: 10000000, //10MB
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'compile_memory_limit',
desc:
'Max memory usage for compile stage in bytes (set to -1 for no limit)',
default: -1, // no limit
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'run_memory_limit',
desc:
'Max memory usage for run stage in bytes (set to -1 for no limit)',
default: -1, // no limit
parser: parse_int,
validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
},
{
key: 'repo_url',
desc: 'URL of repo index',
default:
'https://github.com/engineer-man/piston/releases/download/pkgs/index',
validators: [],
},
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];
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logger.info(`Loading Configuration from environment`);
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let errored = false;
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let config = {};
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options.forEach(option => {
const env_key = 'PISTON_' + option.key.to_upper_case();
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const parser = option.parser || (x => x);
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const env_val = process.env[env_key];
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const parsed_val = parser(env_val);
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const value = env_val || option.default;
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option.validators.for_each(validator => {
let response = null;
if (env_val) response = validator(parsed_val, env_val);
else response = validator(value, value);
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if (response !== true) {
errored = true;
logger.error(
`Config option ${option.key} failed validation:`,
response
);
return;
}
});
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config[option.key] = value;
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});
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if (errored) {
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process.exit(1);
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}
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logger.info('Configuration successfully loaded');
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module.exports = config;