DevStack Tech Talk

devstack-grizzly.sh

# New non-root user
ssh root@<ip-address>
adduser --gecos "" stack
adduser stack sudo
exit
ssh stack@<ip-address>

# Install OpenStack Grizzly with DevStack
sudo apt-get install -y git
git clone https://github.com/openstack-dev/devstack.git -b stable/grizzly devstack/
cd devstack/
curl -sO https://gist.github.com/everett-toews/6629538/raw/c49ae2501ccd50147c3631f35437329397067e6e/localrc
more localrc
./stack.sh

# Wait...time for Q&A

# Go to the dashboard http://<ip-address>
# Username: demo
# Password: devstack

ls exercises/
ls samples/
ls tools/

# Screen
screen -ls
screen -r stack
# Exit: Ctrl+a Ctrl+d
screen -r stack
# Jump to screen number: Ctrl+a <Number> 
# Next screen: Ctrl+a Spacebar
# Scrollback: Ctrl+a Esc <PageUp/PageDn>
# Stop scrollback: Esc 
# New screen: Ctrl+a c
# screen -X -S stack quit
# screen -c stack-screenrc

# Using curl & python
TOKEN=$(curl -s -X POST http://localhost:5000/v2.0/tokens -d '{"auth": {"passwordCredentials": {"username":"demo", "password":"devstack"}, "tenantName":"demo"}}' -H "Content-type: application/json" | python -c 'import json,sys; response=json.loads(sys.stdin.read()); print response["access"]["token"]["id"]')
echo $TOKEN

# Using curl & jq
sudo wget http://stedolan.github.io/jq/download/linux64/jq -O /usr/local/bin/jq
sudo chmod a+x /usr/local/bin/jq
TOKEN=$(curl -s -X POST http://localhost:5000/v2.0/tokens -d '{"auth": {"passwordCredentials": {"username":"demo", "password":"devstack"}, "tenantName":"demo"}}' -H "Content-type: application/json" |  jq -r .access.token.id)
echo $TOKEN

# Using the command line interfaces
source /opt/stack/python-novaclient/tools/nova.bash_completion
source openrc demo demo

# Boot an instance
nova list
nova secgroup-create test test
nova secgroup-add-rule test TCP 22 22 0.0.0.0/0
nova secgroup-add-rule test ICMP -1 -1 0.0.0.0/0
nova keypair-add test > test.pem
chmod 400 test.pem
nova image-list

IMAGE_ID=$(nova image-list | egrep "cirros-.*-uec " | awk '{print $2}')
echo $IMAGE_ID

nova flavor-list
nova boot --flavor 1 --image $IMAGE_ID --key-name test --security-groups test test-vm
nova list

# For nova boot, all of the interactions that occur across services:
#   1. nova client makes a request over HTTP against the Identity service (keystone), passing username and password and getting a token
#   2. nova client makes a request over HTTP against the Compute service (nova-api) to create a new server.
#   3. nova-api makes a request over the message queue to nova-scheduler to run an instance.
#   4. nova-scheduler selects a compute host and makes a request over the message queue to nova-compute on that host to boot a new virtual machine instance.
#   5. nova-compute makes a request over the message queue to nova-network to do network configuration for the new instance.
#   6. nova-compute makes a request over HTTP against the Image Service (glance-api) for the virtual machine image file.
#   7. glance-api makes a request over HTTP against glance-registry to retrieve the file from the image backend.

ping 10.0.0.2
ssh -i test.pem cirros@10.0.0.2
ls -al
exit

# Create an image
curl -O http://c250663.r63.cf1.rackcdn.com/centos60_x86_64.qcow2
glance image-create --name="CentOS6" --container-format=bare --disk-format=qcow2 --is-public=True --file=centos60_x86_64.qcow2

# Database
mysql -uroot -pdevstack
show databases;
use nova;
show tables;
desc instances;
select id, display_name from instances;
quit

# AMQP for RPC
sudo rabbitmqctl list_queues name
sudo rabbitmqctl list_exchanges name

# Go to the Rackspace Python SDK (pyrax) at http://developer.rackspace.com/#python
sudo pip install pyrax bpython

# To get the tenant id, paste it over <tenant-id> below
source openrc admin admin
keystone tenant-get demo

vim ~/.pyrax.cfg
  [private]
  identity_type = keystone
  region = RegionOne
  auth_endpoint = http://localhost:5000/v2.0/
  tenant_id = <tenant-id>
  debug = True

bpython
  import pyrax
  pyrax.set_credentials("demo", "devstack")
  pyrax.regions
  pyrax.cloudservers.list()
  pyrax.cloudservers.list_images()

# Clean up
source openrc demo demo
nova list
nova list | grep test | awk '{print $2}' | xargs -n 1 nova delete

# Swift only, start over with
curl -sO https://gist.github.com/everett-toews/6632691/raw/0951be59af1cd7c0d6f28b0415c82213c9f1e947/localrc
more localrc

# Going nuclear on your Cloud Files container on Rackspace
for region in DFW ORD IAD SYD; do export OS_REGION_NAME=$region; swift list | xargs -n 1 swift delete; done