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8 devstack beyond_hello-world
 

8 devstack beyond_hello-world

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    8 devstack beyond_hello-world 8 devstack beyond_hello-world Presentation Transcript

    • Devstack beyond ‘hello-world’
    • Agenda What is Devstack? Single and multi node architecture Cell architecture Quick demo of cell setup
    • Run it Test it Mimic a deploy Why Devstack?
    • Structure nova-db glance- db img store volume storage
    • Compute Other componentsNova API API request Compute Compute` Compute Compute Single node setup Multi-node setup
    • A peek into stack.sh ADMIN_PASSWORD=password MYSQL_PASSWORD=stackdb RABBIT_PASSWORD=stackqueue SERVICE_PASSWORD=$ADMIN_PASSWORD HOST_IP=w.x.y.z ... localrc – set overrides Database type Enabled services=g-api,n-api,... (Service repos) NOVA_REPO=<nova git repo> NOVA_BRANCH=<nova branch> … stackrc – primary config file
    • HOST_IP = <compute node IP> MULTI_HOST=1 SERVICE_HOST=<controller IP> MYSQL_HOST=<controller IP> RABBIT_HOST=<controller IP> ENABLED_SERVICES=n-cpu, n-net, c-sch, c-api, c-vol On the compute node: localrc settings HOST_IP = <controller IP> MULTI_HOST=1 ENABLED_SERVICES=n-net, n-api, c-sch, c-api, c-vol On the controller node:
    • Work flow API request
    • http://devstack.org/guides/multinode-lab.html
    • Cells
    • Nova- cpu Nova -net DB DB Nova- cpu Nova -net Nova- cell Nova- cell Nova- sch Nova -sch Parent Child Grand-child
    • Parent-child structure
    • AMQP Build Request Parent Child Work flow
    • So, how we do we configure these cells in devstack?
    • Let’s try to configure a cell environment with one parent and one child
    • We used two VMs with Ubuntu 12.04 LTS installed as parent and child for this demo
    • Clone https://github.com/matiu2/devstack on both parent and child and checkout “cell_support” branch
    • Open localrc under devstack folder and type in below content.. MULTI_HOST=True enable_service n-cell n-api-meta disable_service n-cpu … Open /etc/nova/nova.conf and type in below content.. [cells] enable=True name=parent cell_type=api On Parent.. Run ./stack.sh Restart n-api and n-cell services
    • On Child.. Open localrc under devstack folder and type in below content.. MULTI_HOST=True enable_service n-cell disable_service n-api Run ./stack.sh Open /etc/nova/nova.conf and type in below content.. [DEFAULT] quota_driver=nova.quota.NoopQuotaDriver glance_api_server = <glance server running in parent> [cells] enable=True name=child cell_type=compute Restart n-cpu, n-sch and n-cell services
    • Now we are done configuring both parent and child…
    • How do the parent and the child know about each other now?
    • On parent, we will run the command: nova-manage cell create --name=child --cell_type=compute -- username=guest --password=password --hostname=<child ip> -- port=5672 --virtual_host=/ --woffset=1.0 --wscale=1.0
    • On the child, we will run the command: nova-manage cell create –name=parent --cell_type=api -- username=guest --password=password --hostname=<parent ip> -- port=5672 --virtual_host=/ --woffset=1.0 --wscale=1.0
    • Let’s try to build an instance in this cell environment…
    • http://openlystacking.blogspot.in/2013/07/creating-cell-environment-using- devstack.html
    • So far, we have seen… Brief introduction to devstack Single and multi-node environment Cells A demo in a cell environment Questions?