docker-logs-localtime - Replace all UTC dates in docker logs output to local dates in pipe

docker-logs-localtime

#!/usr/bin/env node
// replace all UTC dates to local dates in pipe
// usage: docker logs -t container_name | docker-logs-localtime

// install:	
// curl https://gist.githubusercontent.com/popstas/ffcf282492fd78389d1df2ab7f31052a/raw/505cdf97c6a1edbb10c3b2b64e1836e0627b87a0/docker-logs-localtime > /usr/local/bin/docker-logs-localtime && chmod +x /usr/local/bin/docker-logs-localtime	

// alternative: https://github.com/HuangYingNing/docker-logs-localtime

const pad = d => (d > 9 ? d : '0' + d);

Date.prototype.outDateTime = function() {
  return (
    [this.getFullYear(), pad(this.getMonth() + 1), pad(this.getDate())].join('-') +
    ' ' +
    [pad(this.getHours()), pad(this.getMinutes()), pad(this.getSeconds())].join(':')
  );
};

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', function(data) {
  data = data.replace(/\.\d+Z /g, ' ');
  const match = data.match(/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/g);
  if (match) {
    match.forEach(dateUtc => {
      const d = new Date(dateUtc);
      const offset = new Date().getTimezoneOffset() * 60000;
      const dateLocal = new Date(d.getTime() - offset).outDateTime();
      data = data.replace(dateUtc, dateLocal);
    });
  }
  process.stdout.write(data);
});

I always get the following error if using:
-ash: docker-logs-localtime: command not found

When I use docker logs -t container_name > docker-logs-localtime, the output is not changed..

@dojo90,

1. You should pipe to script, not output, | in place of >
2. You should place script contents to file docker-logs-localtime and make it executable:

curl https://gist.githubusercontent.com/popstas/ffcf282492fd78389d1df2ab7f31052a/raw/505cdf97c6a1edbb10c3b2b64e1836e0627b87a0/docker-logs-localtime > ./docker-logs-localtime
chmod +x ..docker-logs-localtime

docker logs -t container_name | ./docker-logs-localtime

Place docker-logs-localtime into PATH directory for run it globally.

Hi popstas,

I recieved an error "/usr/bin/env: node: No such file or directory". Can you help me?

@raihan519, script using nodejs, you should install it, apt install nodejs for Debian/Ubuntu.

If you have not nodejs yet, it will too excessively for this small script :)

@raihan519, script using nodejs, you should install it, apt install nodejs for Debian/Ubuntu.

If you have not nodejs yet, it will too excessively for this small script :)

Hi popstas,

Thank you so much for the information, it worked for me 👍

Hi popstas,

Another thing, i already add your script when i run docker logs, but it seems the time still using the UTC zone. I want to use the WIB zone (Asia/Jakarta). Do you have a clue how to do it?

# docker logs -t haraka | docker-logs-localtime 
2020-01-29 01:45:05 loaded TLD files: 1=1528 2=8564 3=2448
2020-01-29 01:45:05 loaded 8787 Public Suffixes
2020-01-29 01:45:05 2020-01-29 01:45:05 loglevel: INFO
2020-01-29 01:45:05 2020-01-29 01:45:05 log format: DEFAULT
2020-01-29 01:45:05 2020-01-29 01:45:05 [WARN] [-] [core] smtp.ini.nodes unset, using 1, see https://github.com/haraka/Haraka/wiki/Performance-Tuning
2020-01-29 01:45:05 2020-01-29 01:45:05 Starting up Haraka version 2.8.25
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugins
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugin: relay
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugin: dnsbl
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugin: helo.checks
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugin: mail_from.is_resolvable
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugin: data.headers
2020-01-29 01:45:05 2020-01-29 01:45:05 [INFO] [-] [core] Loading plugin: queue/smtp_forward
2020-01-29 01:45:05 2020-01-29 01:45:05 [NOTICE] [-] [queue/smtp_forward] outbound enabled, will default to disabled in Haraka v3 (see #1472)
2020-01-29 01:45:05 2020-01-29 01:45:05 [NOTICE] [-] [core] worker started worker=1 pid=17

@raihan519, fixed!

log data will lose...

@hynnet, please example.

Are you add -t to docker logs command?

@hynnet, please example.

Are you add -t to docker logs command?

(https://user-images.githubusercontent.com/1593300/75873710-4cd50680-5e08-11ea-8158-852511114d52.png)

sh script version is ok:
https://github.com/HuangYingNing/docker-logs-localtime

@hynnet, then use sh version :)
Scripts working same for me, but my script also removes nanoseconds:

Does this script works on windows?

Should work, not tested

Hallo, when I try this script, I get an error:
double free or corruption (out)
Aborted (core dumped)
Do you have an idea why?

It works for echo command, but not for docker logs. What could be the problem I'm having?

It works for echo command, but not for docker logs. What could be the problem I'm having?

Fixed! I found that it is because the output of docker logs in my case is stderr(not stdout). So my workaround is redirecting the stderr to stdout by adding 2>&1 at the tail of docker logs command. For example:

$ docker logs -t -n 1 doccano 2>&1 | ./docker-logs-localtime
2022-03-02 14:42:21 django.db.utils.IntegrityError: UNIQUE constraint failed

It works for me ( Docker version 20.10.13, build a224086 @ WSL2 Ubuntu 20.04)
Thanks for the good work 👍 💻

Thank you very much!

Fork with timezone offset:
https://gist.github.com/anton-x-t/859a69d0426ed1e4040660f57229c76c