描述#
ceph-csi扩展各种存储类型的卷的管理能力，实现第三方存储ceph的各种操作能力与k8s存储系统的结合。通过 ceph-csi 使用 ceph rbd块设备，它动态地提供rbd以支持 Kubernetes 持久化存储,并将这些rbd映射给 pod做为块设备持久化数据使用。 Ceph 将pod存在块设备的数据以副本机制的方式存储在多个osd上，实现pod数据具有更高的可靠性。
部署环境信息
OS： CentOS Linux release 7.9.2009 (Core)
Kubectl Version：v1.20.2
Ceph Versions：14.2.2
需要部署k8和ceph环境可以看我的文章基于kolla容器化部署ceph和基于ansible自动化部署k8s
配置ceph
# 创建名为kubernetes存储池。
pg与pgs要根据实际情况修改。
$ docker exec -it ceph_mon bash
$ ceph osd pool create kubernetes 64 64
$ ceph osd pool application enable kubernetes rbd
# 新创建的池使用前进行rbd初始化。
$ rbd pool init kubernetes
# 为csi创建一个新用户kubernetes访问kubernetes池。执行以下命令并记录生成的密钥。
$ ceph auth get-or-create client.kubernetes mon 'profile rbd' osd 'profile rbd pool=kubernetes' mgr 'profile rbd'
[client.kubernetes]
key = AQDStCFiN0JMFxAAK8EHEnEIRIN+SbACY0T2lw==
下面配置cephx secret对象时，会要用到userID=kubernetes和userKey=AQDStCFiN0JMFxAAK8EHEnEIRIN+SbACY0T2lw==
# csi需要一个存储在 Kubernetes 中的ConfigMap对象, 对象定义 的是Ceph 集群的 Ceph 监视器地址和fsid。收集 Ceph 集群唯一fsid和监视器地址。
$ ceph mon dump
.....
fsid 4a9e463a-4853-4237-a5c5-9ae9d25bacda
0: [v2:172.20.163.52:3300/0,v1:172.20.163.52:6789/0] mon.172.20.163.52
ceph-csi目前只支持旧版 V1 协议
配置ceph-csi configmap
# 创建ConfigMap对象，将fsid替换为"clusterID"，并将监视器地址替换为"monitors"。
$ cat > csi-config-map.yaml << EOF
---
apiVersion: v1
kind: ConfigMap
data:
config.json: |-
[
{
"clusterID": "4a9e463a-4853-4237-a5c5-9ae9d25bacda",
"monitors": [
"172.20.163.52:6789",
"172.20.163.52:6789",
"172.20.163.52:6789"
]
}
]
metadata:
name: ceph-csi-config
EOF
$ kubectl apply -f csi-config-map.yaml
# 新版本的csi还需要一个额外的ConfigMap对象来定义密钥管理服务 (KMS) 提供者的详细信息, 空配置即可以。
$ cat > csi-kms-config-map.yaml << EOF
---
apiVersion: v1
kind: ConfigMap
data:
config.json: |-
{}
metadata:
name: ceph-csi-encryption-kms-config
EOF
$ kubectl apply -f csi-kms-config-map.yaml
# 查看ceph.conf文件
$ docker exec ceph_mon cat /etc/ceph/ceph.conf
[global]
log file = /var/log/kolla-ceph/$cluster-$name.log
log to syslog = false
err to syslog = false
log to stderr = false
err to stderr = false
fsid = 4a9e463a-4853-4237-a5c5-9ae9d25bacda
mon initial members = 172.20.163.52
mon host = 172.20.163.52
mon addr = 172.20.163.52:6789
auth cluster required = cephx
auth service required = cephx
auth client required = cephx
osd pool default size = 1
osd pool default min size = 1
setuser match path = /var/lib/ceph/$type/$cluster-$id
osd crush update on start = false
# 通过ConfigMap对象来定义 Ceph 配置，以添加到 CSI 容器内的 ceph.conf 文件中。ceph.conf文件内容替换以下的内容。
$ cat > ceph-config-map.yaml << EOF
---
apiVersion: v1
kind: ConfigMap
data:
ceph.conf: |
[global]
log file = /var/log/kolla-ceph/$cluster-$name.log
log to syslog = false
err to syslog = false
log to stderr = false
err to stderr = false
fsid = 4a9e463a-4853-4237-a5c5-9ae9d25bacda
mon initial members = 172.20.163.52
mon host = 172.20.163.52
mon addr = 172.20.163.52:6789
auth cluster required = cephx
auth service required = cephx
auth client required = cephx
osd pool default size = 1
osd pool default min size = 1
setuser match path = /var/lib/ceph/$type/$cluster-$id
osd crush update on start = false
# keyring is a required key and its value should be empty
keyring: |
metadata:
name: ceph-config
EOF
$ kubectl apply -f ceph-config-map.yaml
配置ceph-csi cephx secret
# 创建secret对象, csi需要cephx凭据才能与ceph集群通信。
$ cat > csi-rbd-secret.yaml << EOF
---
apiVersion: v1
kind: Secret
metadata:
name: csi-rbd-secret
namespace: default
stringData:
userID: kubernetes
userKey: AQDStCFiN0JMFxAAK8EHEnEIRIN+SbACY0T2lw==
EOF
$ kubectl apply -f csi-rbd-secret.yaml
配置ceph-csi插件
# 创建所需的ServiceAccount和 RBAC ClusterRole/ClusterRoleBinding Kubernetes 对象。
点击查看csi-provisioner-rbac代码
$ cat > csi-provisioner-rbac.yaml << EOF
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: rbd-csi-provisioner
# replace with non-default namespace name
namespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: rbd-external-provisioner-runner
rules:
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["secrets"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["events"]
verbs: ["list", "watch", "create", "update", "patch"]
- apiGroups: [""]
resources: ["persistentvolumes"]
verbs: ["get", "list", "watch", "create", "update", "delete", "patch"]
- apiGroups: [""]
resources: ["persistentvolumeclaims"]
verbs: ["get", "list", "watch", "update"]
- apiGroups: [""]
resources: ["persistentvolumeclaims/status"]
verbs: ["update", "patch"]
- apiGroups: ["storage.k8s.io"]
resources: ["storageclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshots"]
verbs: ["get", "list", "patch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshots/status"]
verbs: ["get", "list", "patch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshotcontents"]
verbs: ["create", "get", "list", "watch", "update", "delete", "patch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshotclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: ["storage.k8s.io"]
resources: ["volumeattachments"]
verbs: ["get", "list", "watch", "update", "patch"]
- apiGroups: ["storage.k8s.io"]
resources: ["volumeattachments/status"]
verbs: ["patch"]
- apiGroups: ["storage.k8s.io"]
resources: ["csinodes"]
verbs: ["get", "list", "watch"]
- apiGroups: ["snapshot.storage.k8s.io"]
resources: ["volumesnapshotcontents/status"]
verbs: ["update", "patch"]
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get"]
- apiGroups: [""]
resources: ["serviceaccounts"]
verbs: ["get"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: rbd-csi-provisioner-role
subjects:
- kind: ServiceAccount
name: rbd-csi-provisioner
# replace with non-default namespace name
namespace: default
roleRef:
kind: ClusterRole
name: rbd-external-provisioner-runner
apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
# replace with non-default namespace name
namespace: default
name: rbd-external-provisioner-cfg
rules:
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get", "list", "watch", "create", "update", "delete"]
- apiGroups: ["coordination.k8s.io"]
resources: ["leases"]
verbs: ["get", "watch", "list", "delete", "update", "create"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: rbd-csi-provisioner-role-cfg
# replace with non-default namespace name
namespace: default
subjects:
- kind: ServiceAccount
name: rbd-csi-provisioner
# replace with non-default namespace name
namespace: default
roleRef:
kind: Role
name: rbd-external-provisioner-cfg
apiGroup: rbac.authorization.k8s.io
EOF
$ $ kubectl apply -f csi-provisioner-rbac.yaml
点击查看csi-nodeplugin-rbac代码
$ cat > csi-nodeplugin-rbac.yaml << EOF
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: rbd-csi-nodeplugin
# replace with non-default namespace name
namespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: rbd-csi-nodeplugin
rules:
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get"]
# allow to read Vault Token and connection options from the Tenants namespace
- apiGroups: [""]
resources: ["secrets"]
verbs: ["get"]
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get"]
- apiGroups: [""]
resources: ["serviceaccounts"]
verbs: ["get"]
- apiGroups: [""]
resources: ["persistentvolumes"]
verbs: ["get"]
- apiGroups: ["storage.k8s.io"]
resources: ["volumeattachments"]
verbs: ["list", "get"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: rbd-csi-nodeplugin
subjects:
- kind: ServiceAccount
name: rbd-csi-nodeplugin
# replace with non-default namespace name
namespace: default
roleRef:
kind: ClusterRole
name: rbd-csi-nodeplugin
apiGroup: rbac.authorization.k8s.io
EOF
$ kubectl apply -f csi-nodeplugin-rbac.yaml
# 创建所需的ceph-csi容器
点击查看csi-rbdplugin-provisioner代码
$ cat > csi-rbdplugin-provisioner.yaml << EOF
---
kind: Service
apiVersion: v1
metadata:
name: csi-rbdplugin-provisioner
# replace with non-default namespace name
namespace: default
labels:
app: csi-metrics
spec:
selector:
app: csi-rbdplugin-provisioner
ports:
- name: http-metrics
port: 8080
protocol: TCP
targetPort: 8681
---
kind: Deployment
apiVersion: apps/v1
metadata:
name: csi-rbdplugin-provisioner
# replace with non-default namespace name
namespace: default
spec:
replicas: 1
selector:
matchLabels:
app: csi-rbdplugin-provisioner
template:
metadata:
labels:
app: csi-rbdplugin-provisioner
spec:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- csi-rbdplugin-provisioner
topologyKey: "kubernetes.io/hostname"
serviceAccountName: rbd-csi-provisioner
priorityClassName: system-cluster-critical
hostNetwork: true
containers:
- name: csi-provisioner
image: antidebug/csi-provisioner:v3.0.0
args:
- "--csi-address=$(ADDRESS)"
- "--v=5"
- "--timeout=150s"
- "--retry-interval-start=500ms"
- "--leader-election=true"
# set it to true to use topology based provisioning
- "--feature-gates=Topology=false"
# if fstype is not specified in storageclass, ext4 is default
- "--default-fstype=ext4"
- "--extra-create-metadata=true"
env:
- name: ADDRESS
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-snapshotter
image: antidebug/csi-snapshotter:v4.1.1
args:
- "--csi-address=$(ADDRESS)"
- "--v=5"
- "--timeout=150s"
- "--leader-election=true"
env:
- name: ADDRESS
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-attacher
image: antidebug/csi-attacher:v3.2.1
args:
- "--v=5"
- "--csi-address=$(ADDRESS)"
- "--leader-election=true"
- "--retry-interval-start=500ms"
env:
- name: ADDRESS
value: /csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-resizer
image: antidebug/csi-resizer:v1.2.0
args:
- "--csi-address=$(ADDRESS)"
- "--v=5"
- "--timeout=150s"
- "--leader-election"
- "--retry-interval-start=500ms"
- "--handle-volume-inuse-error=false"
env:
- name: ADDRESS
value: unix:///csi/csi-provisioner.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: csi-rbdplugin
# for stable functionality replace canary with latest release version
image: quay.io/cephcsi/cephcsi:v3.5.1
args:
- "--nodeid=$(NODE_ID)"
- "--type=rbd"
- "--controllerserver=true"
- "--endpoint=$(CSI_ENDPOINT)"
- "--csi-addons-endpoint=$(CSI_ADDONS_ENDPOINT)"
- "--v=5"
- "--drivername=rbd.csi.ceph.com"
- "--pidlimit=-1"
- "--rbdhardmaxclonedepth=8"
- "--rbdsoftmaxclonedepth=4"
- "--enableprofiling=false"
env:
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: NODE_ID
valueFrom:
fieldRef:
fieldPath: spec.nodeName
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
# - name: KMS_CONFIGMAP_NAME
# value: encryptionConfig
- name: CSI_ENDPOINT
value: unix:///csi/csi-provisioner.sock
- name: CSI_ADDONS_ENDPOINT
value: unix:///csi/csi-addons.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- mountPath: /dev
name: host-dev
- mountPath: /sys
name: host-sys
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- name: ceph-csi-config
mountPath: /etc/ceph-csi-config/
- name: ceph-csi-encryption-kms-config
mountPath: /etc/ceph-csi-encryption-kms-config/
- name: keys-tmp-dir
mountPath: /tmp/csi/keys
- name: ceph-config
mountPath: /etc/ceph/
- name: csi-rbdplugin-controller
# for stable functionality replace canary with latest release version
image: quay.io/cephcsi/cephcsi:v3.5.1
args:
- "--type=controller"
- "--v=5"
- "--drivername=rbd.csi.ceph.com"
- "--drivernamespace=$(DRIVER_NAMESPACE)"
env:
- name: DRIVER_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: ceph-csi-config
mountPath: /etc/ceph-csi-config/
- name: keys-tmp-dir
mountPath: /tmp/csi/keys
- name: ceph-config
mountPath: /etc/ceph/
- name: liveness-prometheus
image: quay.io/cephcsi/cephcsi:v3.5.1
args:
- "--type=liveness"
- "--endpoint=$(CSI_ENDPOINT)"
- "--metricsport=8681"
- "--metricspath=/metrics"
- "--polltime=60s"
- "--timeout=3s"
env:
- name: CSI_ENDPOINT
value: unix:///csi/csi-provisioner.sock
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
volumeMounts:
- name: socket-dir
mountPath: /csi
imagePullPolicy: "IfNotPresent"
volumes:
- name: host-dev
hostPath:
path: /dev
- name: host-sys
hostPath:
path: /sys
- name: lib-modules
hostPath:
path: /lib/modules
- name: socket-dir
emptyDir: {
medium: "Memory"
}
- name: ceph-config
configMap:
name: ceph-config
- name: ceph-csi-config
configMap:
name: ceph-csi-config
- name: ceph-csi-encryption-kms-config
configMap:
name: ceph-csi-encryption-kms-config
- name: keys-tmp-dir
emptyDir: {
medium: "Memory"
}
EOF
$ kubectl apply -f csi-rbdplugin-provisioner.yaml
点击csi-rbdplugin代码
$ cat > csi-rbdplugin.yaml << EOF
---
kind: DaemonSet
apiVersion: apps/v1
metadata:
name: csi-rbdplugin
# replace with non-default namespace name
namespace: default
spec:
selector:
matchLabels:
app: csi-rbdplugin
template:
metadata:
labels:
app: csi-rbdplugin
spec:
serviceAccountName: rbd-csi-nodeplugin
hostNetwork: true
hostPID: true
priorityClassName: system-node-critical
# to use e.g. Rook orchestrated cluster, and mons' FQDN is
# resolved through k8s service, set dns policy to cluster first
dnsPolicy: ClusterFirstWithHostNet
containers:
- name: driver-registrar
# This is necessary only for systems with SELinux, where
# non-privileged sidecar containers cannot access unix domain socket
# created by privileged CSI driver container.
securityContext:
privileged: true
image: antidebug/csi-node-driver-registrar:v2.2.0
args:
- "--v=5"
- "--csi-address=/csi/csi.sock"
- "--kubelet-registration-path=/var/lib/kubelet/plugins/rbd.csi.ceph.com/csi.sock"
env:
- name: KUBE_NODE_NAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
volumeMounts:
- name: socket-dir
mountPath: /csi
- name: registration-dir
mountPath: /registration
- name: csi-rbdplugin
securityContext:
privileged: true
capabilities:
add: ["SYS_ADMIN"]
allowPrivilegeEscalation: true
# for stable functionality replace canary with latest release version
image: quay.io/cephcsi/cephcsi:v3.5.1
args:
- "--nodeid=$(NODE_ID)"
- "--pluginpath=/var/lib/kubelet/plugins"
- "--stagingpath=/var/lib/kubelet/plugins/kubernetes.io/csi/pv/"
- "--type=rbd"
- "--nodeserver=true"
- "--endpoint=$(CSI_ENDPOINT)"
- "--csi-addons-endpoint=$(CSI_ADDONS_ENDPOINT)"
- "--v=5"
- "--drivername=rbd.csi.ceph.com"
- "--enableprofiling=false"
# If topology based provisioning is desired, configure required
# node labels representing the nodes topology domain
# and pass the label names below, for CSI to consume and advertise
# its equivalent topology domain
# - "--domainlabels=failure-domain/region,failure-domain/zone"
env:
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: NODE_ID
valueFrom:
fieldRef:
fieldPath: spec.nodeName
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
# - name: KMS_CONFIGMAP_NAME
# value: encryptionConfig
- name: CSI_ENDPOINT
value: unix:///csi/csi.sock
- name: CSI_ADDONS_ENDPOINT
value: unix:///csi/csi-addons.sock
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: socket-dir
mountPath: /csi
- mountPath: /dev
name: host-dev
- mountPath: /sys
name: host-sys
- mountPath: /run/mount
name: host-mount
- mountPath: /etc/selinux
name: etc-selinux
readOnly: true
- mountPath: /lib/modules
name: lib-modules
readOnly: true
- name: ceph-csi-config
mountPath: /etc/ceph-csi-config/
- name: ceph-csi-encryption-kms-config
mountPath: /etc/ceph-csi-encryption-kms-config/
- name: plugin-dir
mountPath: /var/lib/kubelet/plugins
mountPropagation: "Bidirectional"
- name: mountpoint-dir
mountPath: /var/lib/kubelet/pods
mountPropagation: "Bidirectional"
- name: keys-tmp-dir
mountPath: /tmp/csi/keys
- name: ceph-logdir
mountPath: /var/log/ceph
- name: ceph-config
mountPath: /etc/ceph/
- name: liveness-prometheus
securityContext:
privileged: true
image: quay.io/cephcsi/cephcsi:v3.5.1
args:
- "--type=liveness"
- "--endpoint=$(CSI_ENDPOINT)"
- "--metricsport=8680"
- "--metricspath=/metrics"
- "--polltime=60s"
- "--timeout=3s"
env:
- name: CSI_ENDPOINT
value: unix:///csi/csi.sock
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
volumeMounts:
- name: socket-dir
mountPath: /csi
imagePullPolicy: "IfNotPresent"
volumes:
- name: socket-dir
hostPath:
path: /var/lib/kubelet/plugins/rbd.csi.ceph.com
type: DirectoryOrCreate
- name: plugin-dir
hostPath:
path: /var/lib/kubelet/plugins
type: Directory
- name: mountpoint-dir
hostPath:
path: /var/lib/kubelet/pods
type: DirectoryOrCreate
- name: ceph-logdir
hostPath:
path: /var/log/ceph
type: DirectoryOrCreate
- name: registration-dir
hostPath:
path: /var/lib/kubelet/plugins_registry/
type: Directory
- name: host-dev
hostPath:
path: /dev
- name: host-sys
hostPath:
path: /sys
- name: etc-selinux
hostPath:
path: /etc/selinux
- name: host-mount
hostPath:
path: /run/mount
- name: lib-modules
hostPath:
path: /lib/modules
- name: ceph-config
configMap:
name: ceph-config
- name: ceph-csi-config
configMap:
name: ceph-csi-config
- name: ceph-csi-encryption-kms-config
configMap:
name: ceph-csi-encryption-kms-config
- name: keys-tmp-dir
emptyDir: {
medium: "Memory"
}
---
# This is a service to expose the liveness metrics
apiVersion: v1
kind: Service
metadata:
name: csi-metrics-rbdplugin
# replace with non-default namespace name
namespace: default
labels:
app: csi-metrics
spec:
ports:
- name: http-metrics
port: 8080
protocol: TCP
targetPort: 8680
selector:
app: csi-rbdplugin
EOF
此处csi-rbdplugin-provisioner
代码与官方不同之处: pod采用hostNetwork: true。
官方csi-rbdplugin-provisioner.yaml文件 官方csi-rbdplugin.yaml文件
使用ceph块设备
# 创建一个存储类
kubernetes storageclass定义了一个存储类。 可以创建多个storageclass对象以映射到不同的服务质量级别（即 NVMe 与基于 HDD 的池）和功能。例如，要创建一个映射到上面创建的kubernetes池的storageclass ，确保"clusterID"与您的ceph集群的fsid一致。
$ cat > csi-rbd-sc.yaml << EOF
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: csi-rbd-sc
provisioner: rbd.csi.ceph.com
parameters:
clusterID: 4a9e463a-4853-4237-a5c5-9ae9d25bacda
pool: kubernetes
imageFeatures: layering
csi.storage.k8s.io/provisioner-secret-name: csi-rbd-secret
csi.storage.k8s.io/provisioner-secret-namespace: default
csi.storage.k8s.io/controller-expand-secret-name: csi-rbd-secret
csi.storage.k8s.io/controller-expand-secret-namespace: default
csi.storage.k8s.io/node-stage-secret-name: csi-rbd-secret
csi.storage.k8s.io/node-stage-secret-namespace: default
reclaimPolicy: Delete
allowVolumeExpansion: true
mountOptions:
- discard
EOF
$ kubectl apply -f csi-rbd-sc.yaml
# 创建pvc
使用上面创建的storageclass创建PersistentVolumeClaim
cat > raw-block-pvc.yaml << EOF
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: raw-block-pvc
spec:
accessModes:
- ReadWriteOnce
volumeMode: Filesystem
resources:
requests:
storage: 2Gi
storageClassName: csi-rbd-sc
EOF
$ kubectl apply -f raw-block-pvc.yaml
# 查看pvc的状态为Bound即正常。
$ kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
raw-block-pvc Bound pvc-d57ba3b8-c916-4182-966f-eb8680955cb7 2Gi RWO csi-rbd-sc 132m
# 将上述 pvc绑定到pod资源作为挂载文件系统的示例。
$ cat > raw-block-pod.yaml << EOF
---
apiVersion: v1
kind: Pod
metadata:
name: pod-with-raw-block-volume
spec:
containers:
- name: web-container
image: nginx
volumeMounts:
- name: data
mountPath: /var/lib/www/html
volumes:
- name: data
persistentVolumeClaim:
claimName: raw-block-pvc
EOF
$ kubectl apply -f raw-block-pod.yaml
$ kubectl exec -it pod-with-raw-block-volume -- lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 492K 0 rom
rbd0 252:0 0 2G 0 disk /var/lib/www/html
vda 253:0 0 50G 0 disk
`-vda1 253:1 0 50G 0 part /etc/hosts
参考文献
[1] ceph.com 作者 202203