d1c0d49cf0
Summary: Online volume expansion is a 2 phase process: 1. The backing storage, in this case the raw file, needs to be resized. (i.e. `truncate -s`) 2. The node should be notified, so that it can both refresh its device capacity (i.e. `losetup -c`) and resize the filesystem (`resize2fs`) accordingly. Although in our case both steps could be performed on the node itself, for the sake of following the semantics of how volume expansion works, we perform step 1 from the controller, and step 2 from the node. Also, the `external-resizer` component is added which watches for PVC size updates, and notifies the CSI controller about it. Test Plan: Setup: - Deploy - Create a rawfile-backed pvc, and attach a Deployment to it - Keep an eye on `rawfile` pod logs in `kube-system` namespace to see if any errors pop out during all scenarios Scenario 1: - Increase the size of the pvc - Exec into the pod and verify that the volume is resized indeed (using `df`) Scenario 2: - Decrease deployment's replica to 0 - Increase the size of the pvc. Wait for a couple of minutes. - Increase deployment's replica to 1 - Exec into the pod and verify that the volume is resized indeed. Reviewers: bghadiri, mhyousefi, h.marvi, sina_rad Reviewed By: bghadiri, mhyousefi, sina_rad Differential Revision: https://phab.hamravesh.ir/D817
78 lines
2.3 KiB
YAML
78 lines
2.3 KiB
YAML
apiVersion: v1
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kind: Service
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metadata:
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name: {{ include "rawfile-csi.fullname" . }}-controller
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labels:
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{{- include "rawfile-csi.labels" . | nindent 4 }}
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component: controller
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spec:
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type: ClusterIP
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selector:
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{{- include "rawfile-csi.selectorLabels" . | nindent 4 }}
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component: controller
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clusterIP: None
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---
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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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name: {{ include "rawfile-csi.fullname" . }}-controller
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spec:
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replicas: 1
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serviceName: {{ include "rawfile-csi.fullname" . }}
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selector:
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matchLabels: &selectorLabels
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{{- include "rawfile-csi.selectorLabels" . | nindent 6 }}
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component: controller
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template:
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metadata:
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labels: *selectorLabels
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spec:
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serviceAccount: {{ include "rawfile-csi.fullname" . }}-driver
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priorityClassName: system-cluster-critical
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tolerations:
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- key: "node-role.kubernetes.io/master"
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operator: Equal
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value: "true"
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effect: NoSchedule
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volumes:
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- name: socket-dir
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emptyDir: {}
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containers:
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- name: csi-driver
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image: "{{ .Values.controller.image.repository }}:{{ .Values.controller.image.tag }}"
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imagePullPolicy: {{ .Values.controller.image.pullPolicy }}
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env:
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- name: CSI_ENDPOINT
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value: unix:///csi/csi.sock
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- name: IMAGE_REPOSITORY
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value: "{{ .Values.controller.image.repository }}"
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volumeMounts:
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- name: socket-dir
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mountPath: /csi
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resources:
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{{- toYaml .Values.controller.resources | nindent 12 }}
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- name: csi-provisioner
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image: quay.io/k8scsi/csi-provisioner:v1.6.0
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imagePullPolicy: IfNotPresent
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args:
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- "--csi-address=$(ADDRESS)"
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- "--feature-gates=Topology=true"
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- "--strict-topology"
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env:
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- name: ADDRESS
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value: /csi/csi.sock
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volumeMounts:
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- name: socket-dir
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mountPath: /csi
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- name: csi-resizer
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image: quay.io/k8scsi/csi-resizer:v0.5.0
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imagePullPolicy: IfNotPresent
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args:
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- "--csi-address=$(ADDRESS)"
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env:
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- name: ADDRESS
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value: /csi/csi.sock
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volumeMounts:
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- name: socket-dir
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mountPath: /csi
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