useful_commands.md

Useful Commands

Remove all docker containers and images

# Stop all containers
docker stop $(docker ps -a -q)
# Delete all containers
docker rm $(docker ps -a -q)
# Delete all images
docker rmi $(docker images -q)

Run chef-solo in vagrant vm

chef-solo -c /tmp/vagrant-chef-1/solo.rb -j /tmp/vagrant-chef-3/dna.json

Run chef-shell in solo mode

chef-shell -s -c /tmp/vagrant-chef-3/solo.rb -j /tmp/vagrant-chef-3/dna.json

Show encrypted data bag item

knife data bag show --editor=/usr/bin/vim --secret-file=../../.chef/encrypted_data_bag_secret secrets ITEM

Mysql backup / restore

backup: mysqldump -u root -p[root_password] [database_name] > dumpfilename.sql

restore: mysql -u root -p[root_password] [database_name] < dumpfilename.sql

sass generate

RAILS_ENV=qa nohup bundle exec rake sass:generate &

copy s3 bucket

RAILS_ENV=qa nohup bundle exec rake fog_s3_copy[from-bucket,to-bucket,access_key_id,secret_access_key] &

passenger tools

/usr/sbin/passenger-status
/usr/sbin/passenger-memory-stats

scp to vagrant vm

scp -P 2222 -i .vagrant/machines/default/virtualbox/private_key file vagrant@localhost:/tmp

scp to boot2docker

scp -i ~/.ssh/id_boot2docker -P 2022 file-to-upload docker@localhost:~

Switch ruby on EY Managed

sudo eselect ruby set ruby19 && sudo /etc/init.d/nginx restart

Sphinx

Find search errors in rails log:

grep -C 10 "search" production.log | grep -C 50 "Completed 500 Internal Server Error"

Disk space

To find the largest 10 files (linux/bash):

find . -type f -print0 | xargs -0 du -s | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {}

To find the largest 10 directories:

find . -type d -print0 | xargs -0 du -s | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {}

Show swap usage by process

Run top then press 'O' (capital letter o) followed by 'p' then 'enter'

Install ruby 2.0 using rbenv

CONFIGURE_OPTS="--with-openssl-dir=`brew --prefix openssl`" rbenv install 2.0.0-p353

Clean up pid space while debugging upstart scripts

http://www.markhneedham.com/blog/2012/09/29/upstart-job-getting-stuck-in-the-startkilled-state/

Dump and restore chef node

knife node show NODE_NAME -F json > NODE_NAME.json
knife node from file NODE_NAME.json

Basic ceph operations

#!/usr/bin/env python

import boto
import boto.s3.connection
access_key = ''
secret_key = ''
bucket_name = ''
host = ''

conn = boto.connect_s3( 
    aws_access_key_id = access_key,
    aws_secret_access_key = secret_key,
    host = host,
    #is_secure=False,               # uncommmnt if you are not using ssl
    calling_format = boto.s3.connection.OrdinaryCallingFormat(),
)

#newbucket = conn.create_bucket(bucket_name)

for bucket in conn.get_all_buckets():
    print "{name}\t{created}".format(
        name = bucket.name,
        created = bucket.creation_date,
    )

#bucket = conn.get_bucket(bucket_name)
#key = bucket.new_key('hello.txt')
#key.set_contents_from_string('Hello World!')

for key in bucket.list():
    print "{name}\t{size}\t{modified}".format(
      name = key.name,
      size = key.size,
      modified = key.last_modified,
    )

List available azure Ubuntu VM images

azure vm image list canadacentral canonical ubuntuserver