How to pull files from Cloud Foundry on Diego

3
votes

I would like to retrieve some application's logs. I found that the command cf file was not available anymore and the plugin cf-download doesn't work on Diego Architecture. Is there a way to retrieve files from the cloud foundry by CLI other another method?

2
command-line-interfacecloud-foundryswisscomdev
Possible duplicate of How to download the app with the CLI from the Swisscom App Cloud? – Josefine
you can also use cf ssh or native SSH client. See docs.cloudfoundry.org/devguide/deploy-apps/ssh-apps.html – Josefine
The use of API didn't work for me the logs were not present. But in the documentation of SSH i found what i was looking for: Application SSH Access without cf CLI. I'll refer it as the solution – jerem0808

2 Answers

0
votes

The solution is to use SSH without cf CLI

When you are at the step 4) you can use WinSCP (for Windows) to have a graphical interface to navigate in the folders.

0
votes

A simpler albeit uncloudy / hacky solution is to use cf ssh to transfer via stdout.

For example, if you want to transfer all files directly under /home/vcap/logs you can do...

Update: Here's the much simpler and faster version without a for loop using only tar:

cf ssh <APP> -i <INSTANCE> -c 'tar cfz - logs/*.log' | tar xfz - -C .

In my case this transfers 1 GB log files in just under 20 seconds.

Original answer:

#!/bin/sh
mkdir -p logs
for f in $( cf ssh <APP> -i <INSTANCE> -c 'ls logs/*' ); do
    cf ssh <APP> -i <INSTANCE> -c "cat $f" > $f
done

In my setup this took about 11 minutes to transfer 1.3GB of log files.

Using gzip compression brought this down to 5 minutes (replace the line in the for loop):

    cf ssh <APP> -i <INSTANCE> -c "cat $f | gzip -c" | gunzip > $f

Pretty sure this can be optimized using tar and getting rid of the for loop.