Storage Architecture #
Maintaining state in Kubernetes can be complex. I’m using a local path provisioner after having tried many other options which did not match my low risk apatite for storage. The code can be found here or here (post fluxcd migration).
Storage Tiers #
Each server has SSD and HDD storage. I created a predefined folder structures, each folder would answer to different storage requirements:
| Backup | Volatility | Speed |
|---|---|---|
| - 1: Backed-up (High Availability) - 2: Not Backed-up (Normal Availability) | - 1: Persistent, retained indefinite - 2: Volatile, removed after 2 weeks | - 1: High speed SSD storage - 2: Normal speed HDD Storage - 3: Slower speed HDD storage |
Generic Instances #
| Class Code | Implemented server(s) | Backup | Volatility | Speed | Hostpath | Reclaim |
|---|---|---|---|---|---|---|
| 111 | 1: linux-wayne | 1 | 1 | 1 | /mnt/ssd/ha/<service_name> | manual |
| 211 | 1: linux-wayne | 2 | 1 | 1 | /mnt/ssd/na/<service_name> | automatic |
| 221 | 1: linux-wayne | 2 | 2 | 1 | /mnt/ssd/tmp/<service_name> | automatic |
| 112 | 1: linux-wayne | 1 | 1 | 2 | /mnt/hdd/ha/<service_name> | manual |
| 212 (default) | 1: linux-wayne | 2 | 1 | 2 | /mnt/hdd/na/<service_name> | automatic |
| 222 | 1: linux-wayne | 2 | 2 | 2 | /mnt/hdd/tmp/<service_name> | automatic |
Specific Instances #
TODO: update
| Class Code | Implemented server(s) | Backup | Volatility | Speed | Persistent Volume (PV) name | Hostpath |
|---|---|---|---|---|---|---|
| 211 | 1: linux-wayne | 2 | 1 | 1 | nextcloud-config | /mnt/ssd/ha/nextcloud/config/ |
| 212 | 1: linux-wayne | 2 | 1 | 2 | nextcloud-data | /mnt/hdd/ha/nextcloud/data/ |