GitOps Happy Hour: Storing (g)it

Working with Storage in a GitOps world

Transcript

1. Storing (g)it
   Working with Storage in a GitOps world
   GitOps Happy Hour
   1
   Christian Hernandez
   Cloud Platforms BU
   

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2. A broad spectrum of
   static and dynamic storage endpoints
   OPENSHIFT CONTAINER PLATFORM | Persistent Storage
   NFS
   GlusterFS
   OpenStack Cinder
   Ceph RBD
   AWS EBS
   GCE Persistent
   Disk
   iSCSI
   Fiber Channel
   Azure Disk
   Azure File
   FlexVolume
   VMWare
   vSphere VMDK
   Container Storage
   Interface (CSI)**
   NetApp Trident*
   2
   

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3. PV Consumption
   OPENSHIFT CONTAINER PLATFORM | Persistent Storage
   Node
   POD
   CONTAINER
   Claim
   Z
   apiVersion: v1
   kind: Pod
   metadata:
   name: mypod
   spec:
   containers:
   - name: myfrontend
   image: nginx
   volumeMounts:
   - mountPath: "/var/www/html"
   name: mypd
   volumes:
   - name: mypd
   persistentVolumeClaim:
   claimName: z
   PV
   Kubelet
   Storage
   /foo/bar
   3
   

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4. iSCSI
   PV
   iSCSI
   PV
   NFS
   PV
   NFS
   PV
   Static Storage Provisioning
   OPENSHIFT CONTAINER PLATFORM | Persistent Storage
   Admin
   PersistentVolumes
   NFS
   PV
   iSCSI
   PV
   ...
   Claim
   Z
   2Gi RWX
   Bind
   User
   POD
   CONTAINER
   ...
   VolumeMount: Z
   Pod Definition
   Mount
   Define/Map
   2Gi NFS
   4
   

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5. Dynamic Storage Provisioning
   OPENSHIFT CONTAINER PLATFORM | Persistent Storage
   Admin
   StorageClass
   Claim
   Z
   2Gi RWX
   Good
   Bind
   User
   ...
   VolumeMount: Z
   Pod Definition
   Mount
   Fast
   NetApp Flash
   Block
   VMware VMDK
   Good
   NetApp SSD
   API
   Server
   NetApp SSD
   2Gi NFS
   PV
   Create
   Map
   POD
   CONTAINER
   5
   

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6. Challenges in a GitOps world
   OPENSHIFT CONTAINER PLATFORM | Persistent Storage
   6
   Dynamic Storage provisioning
   ○ (By default) storage reclaim policy is set to “Delete”
   ○ Little control
   ○ Reclaiming storage after disaster is a manual process
   ■ It’s less work restoring from backup
   Manual Storage provisioning
   ○ Storage needs to be set up for each application
   ○ Keeping track of what is what
   ○ More control means more steps
   Other things to consider
   ○ File permissions
   ○ Restoring from backups
   

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7. Challenges in a GitOps world
   OPENSHIFT CONTAINER PLATFORM | Persistent Storage
   7
   Dynamic Storage provisioning
   ○ (By default) storage reclaim policy is set to “Delete”
   ○ Little control
   ○ Reclaiming storage after disaster is a manual process
   ■ It’s less work restoring from backup
   Manual Storage provisioning
   ○ Storage needs to be set up for each application
   ○ Keeping track of what is what
   ○ More control means more steps
   Other things to consider
   ○ File permissions
   ○ Restoring from backups
   There’s no magic bullet
   

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8. Let’s Explore!
   Hacking away at it until it works.
   GitOps Happy Hour
   8
   Keyboard time!
   

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