Merry together

2017-01-31 1 min read Uncategorized

from Instagram: http://ift.tt/2klfb8U

journalctl command to see kernel messages

2017-01-30 1 min read Fedora

Sometimes, there are just too many messages in journalctl output and it becomes a mystery game to search for the messages you are looking for. But luckily you do not need to use grep to find the right message. Here is example of what I had to do when I was looking for kernel messages.

journalctl _TRANSPORT=kernel
# To see all the fields, you can use the verbose mode
journalctl _TRANSPORT=kernel -o verbose

# And the filter on priority if needed to get the messages you need
journalctl _TRANSPORT=kernel PRIORITY=4

# and follow
journalctl _TRANSPORT=kernel PRIORITY=4 -f -l

Just hanging around.

2017-01-26 1 min read Uncategorized

from Instagram: http://ift.tt/2k7Emfx

Compose a video from a text sequence

2017-01-23 1 min read Learning

I came across this useful and interesting project so sharing with all of you:

seq2vid

Elephants at IG, Delhi

2017-01-19 1 min read Photo

from Instagram: http://ift.tt/2jOoDin

Get disk usage for all the containers with python script

2017-01-16 1 min read Python

With my increasing love for python, here is my attempt to get the disk usage of all the containers on some host. Well, since the requirements vary for everyone, so this script is far from complete.

import docker
import json

# We will connect to 192.168.122.1 for docker daemon. If that is not the case,
# then change the below.

client = docker.DockerClient(base_url="tcp://192.168.122.1:4243")

# Get list of all containers.
cls=client.containers.list()
stats={}

# And now we will iterate over that list to get stats for all the containers.
for val in cls:
    print (val.name)
    stats[val.name] = val.stats(stream=False)
    # Get the disk usage for root and /tmp from containers with docker.exec
    stats[val.name]['df-root'] = ( str(val.exec_run(r'df -kh --output="size,used,avail,pcent" /', stream=False).splitlines()[1]).replace("'","").split()[1:] )
    stats[val.name]['df-tmp'] = ( str((val.exec_run(r'df -kh --output="size,used,avail,pcent" /tmp ', stream=False).splitlines()[1:]+[''])[0]).replace("'","").split()[1:] )

# Now if you want, we have dict of all the data and we can process the
# way we like it, for example create a html table for disk usage only.
print ('<table>')
for st in stats:
    print ('<tr>')
    print ("<td>Root-%s</td>"%(st))
    for i in stats[st]['df-root']:
        print ('<td>%s</td>'%(i) )
    print ('</tr>')
    print ('<tr>')
    print ("<td>tmp-%s</td>"%(st))
    for i in stats[st]['df-tmp']:
        print ('<td>%s</td>'%(i) )
    print ('</tr>')

print ('</table>')

ansible with docker dynamic inventory

2017-01-09 2 min read Bash Fedora Vurtualization

So, I have a few dockers. Every now and then I want to run some command on all of them. Doing ‘docker exec’ is tiresome. I found this neat solution with ansible that I thought I should share with you.

To get started, you need to have the “docker.py” script. This script will be used as python script inventory for ansible. So, use the following command and get the script:

Older posts Newer posts