James Page presented on using Juju and charms to manage the operational complexity of Ceph deployments. Juju provides an auto-magic deployment tool and model-driven operations that can be used to deploy Ceph along with related applications like rbd-mirror across multiple data centers. The Ceph charms encapsulate operational knowledge to handle tasks like installation, configuration, upgrades, scaling, and health monitoring. Juju allows defining the application model and relating applications across models, and includes features like MAAS for server provisioning and LXD for containers. Demostrations showed using Juju actions to manage Ceph operations like creating pools, refreshing mirrors, and upgrading versions across availability zones.

1. Managing Ceph operational
complexity using Juju
James Page, Principal Engineer, OpenStack Engineering
Ceph Day London 2019

2. $ whois jamespage
[ ceph | ubuntu | debian| openstack | juju | charms ]

3. Ceph? it’s just servers and disks right?

4. Deployment Considerations
Block Devices
SATA
SSD
NVMe
Networks
10G
25G
100G
40G
Leaf/Spine
(Clos)
Physical Zoning
Racks
ToR
Switches
Power
Cluster/Public
Servers
RAM
CPU
Disaster Recovery

5. An auto-magic deployment tool for an
auto-magic SDS platform?

6. Juju
Controllers
Applications
Machines
Relations
Networking
Storage
Model driven, re-usable
open source operations

7. Charms
Installation
Configuration
Connection
Upgrades and Updates
Scale-out (and in)
Health
Operations
Encapsulation of
operational knowledge of
applications

8. Ceph Charms
MON and OSD
RADOS Gateway
RBD mirror
CephFS
Upgrades
Operations
Deploying Ceph
since 2011

9. MAAS
Automated physical server provisioning
Dynamic allocation of workloads
IPAM
Zones
Web UI and REST API
Open source bare-metal
automation

10. LXD
Machine containers
Resource management
REST API
Juju integration
Faster, denser, lower
latency Linux machine
containers

11. Ceph + Juju

12. Application Model

13. Machine View

14. Cross Model Relations
us-east us-west

15. Operations
juju run-action -m us-west --wait
ceph-mon/leader create-pool
name=another-rbd-pool app-name=rbd
juju run-action -m us-west --wait
rbd-mirror-us-west/leader refresh-pools

16. Operations
[ Demo ]

17. Operations
juju run-action -m us-west --wait
rbd-mirror-us-west/leader demote
juju run-action -m us-east --wait
rbd-mirror-us-east/leader promote

18. Operations - Upgrades
juju config ceph-mon source=cloud:bionic-train
juju config ceph-osd source=cloud:bionic-train

19. Encryption at Rest

20. https://github.com/javacruft/ceph-day-london-2019
https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/
irc: #openstack-charms
Thankyou! Questions?