Rackspace cloud-init configuration (drop in /etc/cloud/cloud.cfg.d)

10_rackspace.cfg

datasource_list: [ ConfigDrive, None ]
disable_root: False
ssh_pwauth: True
ssh_deletekeys: False
resize_rootfs: noblock
growpart:
  mode: auto
  devices: ['/']

cloud_config_modules:
 - disk_setup
 - mounts
 - ssh-import-id
 - locale
 - set-passwords
 - package-update-upgrade-install
 - yum-add-repo
 - timezone
 - puppet
 - chef
 - salt-minion
 - mcollective
 - disable-ec2-metadata
 - runcmd
 - byobu

cloud_init_modules:
 - migrator
 - bootcmd
 - write-files
 - growpart
 - resizefs
 - set_hostname
 - update_hostname
 - update_etc_hosts
 - rsyslog
 - users-groups
 - ssh

cloud_final_modules:
 - rightscale_userdata
 - scripts-per-once
 - scripts-per-boot
 - scripts-per-instance
 - scripts-user
 - phone-home
 - final-message
# this bit scales some sysctl parameters to flavor type
runcmd:
  - echo "net.ipv4.tcp_rmem = $(cat /proc/sys/net/ipv4/tcp_mem)" >> /etc/sysctl.conf
  - echo "net.ipv4.tcp_wmem = $(cat /proc/sys/net/ipv4/tcp_mem)" >> /etc/sysctl.conf
  - echo "net.core.rmem_max = $(cat /proc/sys/net/ipv4/tcp_mem | awk {'print $3'})" >> /etc/sysctl.conf
  - echo "net.core.wmem_max = $(cat /proc/sys/net/ipv4/tcp_mem | awk {'print $3'})" >> /etc/sysctl.conf
  - echo 'net.ipv4.tcp_window_scaling = 1' >> /etc/sysctl.conf
  - echo 'net.ipv4.tcp_timestamps = 1' >> /etc/sysctl.conf
  - echo 'net.ipv4.tcp_sack = 1' >> /etc/sysctl.conf
  - sysctl -p