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unzip.js
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unzip.js
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/* jshint esnext: true */
var util = require('util');
var fs = require('fs');
var AWS = require('aws-sdk');
var progress = require('progress-stream');
var prettyBytes = require('pretty-bytes');
var moment = require('moment');
var numeral = require('numeral');
var log = require('loglevel');
var pg = require('pg');
var child_process = require('child_process');
var zlib = require('zlib');
var debounce = require('debounce');
var ArgumentParser = require('argparse').ArgumentParser;
var rollbar = require('rollbar');
rollbar.init(process.env.ROLLBAR_TOKEN);
var parser = new ArgumentParser({
version: '0.0.1',
addHelp: true,
description: "Unzips detailed billing reports"
});
parser.addArgument(
['-i', '--source-bucket'], {
help: 'The source S3 bucket name',
defaultValue: process.env.DBR_BUCKET
}
);
parser.addArgument(
['-o', '--dest-bucket'], {
help: 'The destination S3 bucket name',
defaultValue: process.env.STAGING_BUCKET
}
);
parser.addArgument(
['-r', '--redshift-url'], {
help: 'The destination S3 bucket name',
defaultValue: process.env.REDSHIFT_URL
}
);
parser.addArgument(
['-t', '--target-table'], {
help: 'The redshift table to copy data into',
defaultValue: 'line_items'
}
);
parser.addArgument(
['-f', '--file'], {
help: 'The file to unzip and copy',
required: true
}
);
parser.addArgument(
['-d', '--debug'], {
action: 'storeConst',
dest: 'debug',
help: 'Turn on debugging output',
constant: true
}
);
var args = parser.parseArgs();
if (args.debug) {
log.setLevel('debug');
log.debug("Debugging output enabled.");
} else {
log.setLevel('info');
}
log.debug(args);
var dbrClientOptions = {
accessKeyId: process.env.DBR_AWS_ACCESS_KEY_ID,
secretAccessKey: process.env.DBR_AWS_SECRET_ACCESS_KEY
};
var stagingClientOptions = {
accessKeyId: process.env.IDAN_AWS_ACCESS_KEY_ID,
secretAccessKey: process.env.IDAN_AWS_SECRET_ACCESS_KEY
};
// We'll need these handy in various places
var monthMatch = /(\d{4})-(\d{2})/.exec(args.file);
var year = monthMatch[1];
var month = monthMatch[2];
var monthString = `${year}_${month}`;
var monthDateString = `${year}-${month}-01`;
// S3 Clients for the DBR and staging buckets
var dbrClient = new AWS.S3(dbrClientOptions);
var stagingClient = new AWS.S3(stagingClientOptions);
// ==============================================================
// Each of the major steps is a function which returns a promise.
// ==============================================================
var downloadFile = function(bucket, key) {
// Downloads the specified DBR zip
log.info(`${monthString} (download): downloading '${key}' from S3...`);
return new Promise(function(resolve, reject) {
var sourceParams = {
Bucket: bucket,
Key: key
};
var outStream = fs.createWriteStream(key);
var downloadProgress = progress({
length: 0,
time: 1000
});
downloadProgress.on("progress", function(progress) {
percentage = numeral(progress.percentage/100).format('00.0%');
eta = moment.duration(progress.eta * 1000).humanize();
log.info(`${monthString} (download): ${percentage} (${eta} at ${prettyBytes(progress.speed)}/sec)`);
});
var request = dbrClient.getObject(sourceParams);
request.on('httpHeaders', function(status, headers, resp) {
totalLength = parseInt(headers['content-length'], 10);
downloadProgress.setLength(totalLength);
});
var zipfileStream = request.createReadStream();
zipfileStream.pipe(downloadProgress)
.pipe(outStream);
outStream.on('close', function() {
var durationString = moment.utc(moment.utc() - startTime).format("HH:mm:ss.SSS");
log.info(`${monthString} (download): complete (${durationString})`);
resolve(key);
});
});
};
var processZipFile = function(zipFileName) {
// Unzip, gzip, and upload to the staging bucket on S3
log.info(`${monthString} (process): processing '${zipFileName}'...`);
// In theory, zipfiles can contain multiple files
// We know that the DBR zip has only one file inside, the DBR CSV
return new Promise(function(resolve, reject) {
var uncompressedLength = parseInt(child_process.execSync(
`zipinfo -t ${zipFileName} | cut -d ' ' -f 3`, {encoding: 'utf8'}
));
// Hack off the '.zip'
var plainFileName = zipFileName.substr(0, zipFileName.length - 4);
// For monitoring unzip progress
var unzipProgress = progress({time: 10000, length: uncompressedLength}, function(progress) {
percentage = numeral(progress.percentage/100).format('00.0%');
eta = moment.duration(progress.eta * 1000).humanize();
log.info(`${monthString} (process-unzip): ${percentage} (${eta} at ${prettyBytes(progress.speed)}/sec)`);
});
// For monitoring gzip progress.
// From this point forward in the stream, we don't know the stream length as
// we don't know how much the stream will compress down to until it's done.
var gzipProgress = progress({time: 10000}, function(progress) {
log.info(`${monthString} (process-gzip): ${prettyBytes(progress.transferred)} at ${prettyBytes(progress.speed)}/sec`);
});
// Hook up every part of the stream prior to the HTTP upload to S3
// Stream not flowing at this point! Triggered by request.send() below.
var unzipGzipStream = child_process.spawn('unzip', ['-p', './' + zipFileName])
.stdout
.pipe(unzipProgress)
.pipe(zlib.createGzip())
.pipe(gzipProgress);
// Prepare the upload to S3 with the stream as the body
var requestParams = {
Bucket: process.env.STAGING_BUCKET,
Key: `${plainFileName}.gz`,
Body: unzipGzipStream
};
var request = stagingClient.upload(requestParams);
request.on('httpUploadProgress', debounce(function(progress) {
log.info(`${monthString} (process-upload): ${prettyBytes(progress.loaded)}`);
}, 1000, true));
// Fire the upload request, gets the stream flowing.
request.send(function(err, data) {
if (err) throw err;
var durationString = moment.utc(moment.utc() - startTime).format("HH:mm:ss.SSS");
log.info(`${monthString} (upload): complete (${durationString})`);
resolve(`s3://${requestParams.Bucket}/${requestParams.Key}`);
});
});
};
var importToRedshift = function(s3uri) {
// Import the gzipped DBR from the staging bucket into a staging table on
// redshift. Add the statement_month column and then copy from staging into
// line_items, then drop the staging table.
log.info(`${monthString} (import): importing to redshift...`);
return new Promise(function(resolve, reject) {
var client = new pg.Client(args.redshift_url);
client.connect(function(err) {
if (err) throw err;
var stagingTableName = `staging_${monthString}`;
var query = `
BEGIN;
-- can't create and alter because statement_month is the sortkey
-- must create from scratch
-- CREATE TABLE ${stagingTableName} (LIKE line_items);
-- ALTER TABLE ${stagingTableName} DROP COLUMN statement_month;
CREATE TABLE IF NOT EXISTS ${stagingTableName} (
invoice_id TEXT,
payer_account_id TEXT,
linked_account_id TEXT,
record_type TEXT,
record_id TEXT,
product_name TEXT,
rate_id TEXT,
subscription_id TEXT,
pricing_plan_id TEXT,
usage_type TEXT,
operation TEXT,
availability_zone TEXT,
reserved_instance TEXT,
item_description TEXT,
usage_start_date TIMESTAMP,
usage_end_date TIMESTAMP,
usage_quantity FLOAT8,
blended_rate NUMERIC(18,11),
blended_cost NUMERIC(18,11),
unblended_rate NUMERIC(18,11),
unblended_cost NUMERIC(18,11),
resource_id TEXT,
cloud TEXT,
slot TEXT,
PRIMARY KEY(record_id)
) DISTSTYLE EVEN;
COPY ${stagingTableName}
FROM '${s3uri}'
CREDENTIALS 'aws_access_key_id=${stagingClientOptions.accessKeyId};aws_secret_access_key=${stagingClientOptions.secretAccessKey}'
GZIP CSV IGNOREHEADER 1;
ALTER TABLE ${stagingTableName} ADD COLUMN statement_month DATE DEFAULT '${monthDateString}';
INSERT INTO line_items SELECT * FROM ${stagingTableName};
DROP TABLE ${stagingTableName};
COMMIT;
-- ANALYZE line_items;
-- VACUUM line_items;
`;
log.debug(query);
client.query(query, function(err, result) {
if (err) throw err;
var durationString = moment.utc(moment.utc() - startTime).format("HH:mm:ss.SSS");
log.info(`${monthString} (import): complete (${durationString})`);
resolve(s3uri);
});
});
});
};
// Kick off the promise chain.
var startTime = moment.utc();
downloadFile(args.source_bucket, args.file)
.then(processZipFile)
.then(importToRedshift)
.then(function(s3uri) {
var durationString = moment.utc(moment.utc() - startTime).format("HH:mm:ss.SSS");
log.info(`${monthString}: Import complete! Took ${durationString}`);
process.exit();
})
.catch(function(err) {
var durationString = moment.utc(moment.utc() - startTime).format("HH:mm:ss.SSS");
log.error(`${monthString}: Something went terribly wrong after ${durationString}`);
log.error(err);
log.error(err.stack);
rollbar.handleError(err);
process.exit();
});