lovr: LOgVieweR

LOgVieweR is a tool that enable you to view your logs in a human readable way.

Example:

Input:

{"level":"info","ts":1648174276.8416204,"caller":"api/main.go:45","msg":"connecting to redis","service":"website-api","version":"dev","build":"local","build_date":"20220308","go_version":"go1.16.5","addresses":["redis:6379"]}
{"level":"info","ts":1648174276.8429966,"caller":"zapreporter/reporter.go:28","msg":"starting service","service":"website-api","version":"dev","build":"local","build_date":"20220308","go_version":"go1.16.5","dependency.service":"HTTP Server"}

Output

     Level: Info
   Message: connecting to redis
 Timestamp: 2022-03-24 23:11:16.841620445 -03:00
    Fields:
      ├─ service   : website-api
      ├─ version   : dev
      ├─ build     : local
      ├─ build_date: 20220308
      ├─ go_version: go1.16.5
      └─ addresses : [redis:6379]
    Caller: api/main.go:45
----------------------------------------
     Level: Info
   Message: starting service
 Timestamp: 2022-03-24 23:11:16.842996597 -03:00
    Fields:
      ├─ service           : website-api:wq
      ├─ version           : dev
      ├─ build             : local
      ├─ build_date        : 20220308
      ├─ go_version        : go1.16.5
      └─ dependency.service: HTTP Server
    Caller: zapreporter/reporter.go:28
----------------------------------------
EOF

Installation

go install github.com/jamillosantos/lovr/lovr@latest

Usage

Below some examples of how you can use the lovr:

Loading from a file:

For this case, imagine you have a log file called app.log.

lovr -s app.log

Listening changes in a file:

For this case, you have a process running adding logs to a app.log.

tail -f app.log | lovr

Filtering entries

lovr --filter 'debug_id = "75fcd5f5-f04d-4dc7-9be3-e2e574857a76"' -s app.log
# Or 
lovr -f 'debug_id = "75fcd5f5-f04d-4dc7-9be3-e2e574857a76"' -s app.log

Loading from the STDIN:

For this case, you will run your application and its STDOUT will be redirected straight to the lovr. As long yourapp is running, lovr will be active converting the output.

./yourapp | lovr

Loading from the STDERR:

The same as above. However, in this case, instead of capturing the STDOUT, we are capturing the STDERR.

./yourapp 2>&1 >/dev/null | lovr

Loading from a docker container:

In this case, we will be capturing the output of docker container. The docker logs will output all the logs it has until this moment, then it will close. lovr will also close when it happens.

docker logs c353a06afee4 | lovr

If you want to keep lovr running just add the -f option to the docker logs command.

docker logs -f c353a06afee4 2>&1 | lovr

Loading from a docker-compose container:

In this case, we will be capturing the output of docker-compose container. The docker-compose logs will output all the logs it has until this moment, then it will close. lovr will also close when it happens.

docker-compose logs --no-log-prefix api | lovr

If you want to keep lovr running just add the -f option to the docker-compose logs command.

docker-compose logs -f --no-log-prefix api | lovr