Kubernetes:GCP 上的 Cassandra(有状态集)部署
Kubernetes: Cassandra(stateful set) deployment on GCP
有没有人尝试使用 kubernetes(不是 GKE)在 GCP 上部署 Cassandra (POC)。如果是这样,您能否分享有关如何使其正常工作的信息?
您可以先查看 IBM's Scalable-Cassandra-deployment-on-Kubernetes。
对于种子发现,您可以使用无头服务,类似于此 Multi-node Cassandra Cluster Made Easy with Kubernetes。
一些困难:
- fast local storage for K8s is still in beta; of course, you can use what k8s already has; there are some users reporting 他们使用带有 8 个 C* 节点的 Ceph RBD,每个节点在 K8s 上有 2TB 的数据。
- 在某个时候你会意识到你需要一个 C* 运算符 - 这是一些很好的启动 - Instaclustr's Cassandra Operator and Pantheon Systems' Cassandra Operator
- 你需要一种方法scale in gracefully stateful applications(运营商也应该涵盖;如果你不需要运营商,这是一个解决方案,但你仍然需要使用控制器)。
您还可以查看 Cassandra mailing list,,因为那里已经有人在生产中使用 Cassandra 而不是 K8s。
我已经在 kubernetes 上实现了 cassandra。请找到我的部署和服务 yaml 文件:
apiVersion: v1
kind: Service
metadata:
labels:
app: cassandra
name: cassandra
spec:
clusterIP: None
ports:
- port: 9042
selector:
app: cassandra
---
apiVersion: apps/v1beta2
kind: StatefulSet
metadata:
name: cassandra
labels:
app: cassandra
spec:
serviceName: cassandra
replicas: 3
updateStrategy:
type: RollingUpdate
selector:
matchLabels:
app: cassandra
template:
metadata:
labels:
app: cassandra
spec:
terminationGracePeriodSeconds: 1800
containers:
- name: cassandra
image: gcr.io/google-samples/cassandra:v12
imagePullPolicy: Always
ports:
- containerPort: 7000
name: intra-node
- containerPort: 7001
name: tls-intra-node
- containerPort: 7199
name: jmx
- containerPort: 9042
name: cql
resources:
limits:
cpu: "500m"
memory: 1Gi
requests:
cpu: "500m"
memory: 1Gi
securityContext:
capabilities:
add:
- IPC_LOCK
lifecycle:
preStop:
exec:
command:
- /bin/sh
- -c
- nodetool drain
env:
- name: MAX_HEAP_SIZE
value: 512M
- name: HEAP_NEWSIZE
value: 100M
- name: CASSANDRA_SEEDS
value: "cassandra-0.cassandra.default.svc.cluster.local"
- name: CASSANDRA_CLUSTER_NAME
value: "K8Demo"
- name: CASSANDRA_DC
value: "DC1-K8Demo"
- name: CASSANDRA_RACK
value: "Rack1-K8Demo"
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
readinessProbe:
exec:
command:
- /bin/bash
- -c
- /ready-probe.sh
initialDelaySeconds: 15
timeoutSeconds: 5
volumeMounts:
- name: cassandra-data
mountPath: /cassandra_data
volumeClaimTemplates:
- metadata:
name: cassandra-data
spec:
accessModes: [ "ReadWriteOnce" ]
storageClassName: "fast"
resources:
requests:
storage: 5Gi
希望对您有所帮助。
使用头盔:
在 Mac:
brew install helm@2
brew link --force helm@2
helm init
避免 Kubernetes Helm 权限地狱:
来自:https://github.com/helm/helm/issues/2224:
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
卡桑德拉
孵化器:
helm repo add https://github.com/helm/charts/tree/master/incubator/cassandra
helm install --namespace "cassandra" -n "cassandra" incubator/cassandra
helm status "cassandra"
helm delete --purge "cassandra"
比特纳米:
helm repo add bitnami https://charts.bitnami.com/bitnami
helm install --namespace "cassandra" -n "my-deployment" bitnami/cassandra
helm status "my-deployment"
helm delete --purge "my-deployment"
有没有人尝试使用 kubernetes(不是 GKE)在 GCP 上部署 Cassandra (POC)。如果是这样,您能否分享有关如何使其正常工作的信息?
您可以先查看 IBM's Scalable-Cassandra-deployment-on-Kubernetes。
对于种子发现,您可以使用无头服务,类似于此 Multi-node Cassandra Cluster Made Easy with Kubernetes。
一些困难:
- fast local storage for K8s is still in beta; of course, you can use what k8s already has; there are some users reporting 他们使用带有 8 个 C* 节点的 Ceph RBD,每个节点在 K8s 上有 2TB 的数据。
- 在某个时候你会意识到你需要一个 C* 运算符 - 这是一些很好的启动 - Instaclustr's Cassandra Operator and Pantheon Systems' Cassandra Operator
- 你需要一种方法scale in gracefully stateful applications(运营商也应该涵盖;如果你不需要运营商,这是一个解决方案,但你仍然需要使用控制器)。
您还可以查看 Cassandra mailing list,,因为那里已经有人在生产中使用 Cassandra 而不是 K8s。
我已经在 kubernetes 上实现了 cassandra。请找到我的部署和服务 yaml 文件:
apiVersion: v1
kind: Service
metadata:
labels:
app: cassandra
name: cassandra
spec:
clusterIP: None
ports:
- port: 9042
selector:
app: cassandra
---
apiVersion: apps/v1beta2
kind: StatefulSet
metadata:
name: cassandra
labels:
app: cassandra
spec:
serviceName: cassandra
replicas: 3
updateStrategy:
type: RollingUpdate
selector:
matchLabels:
app: cassandra
template:
metadata:
labels:
app: cassandra
spec:
terminationGracePeriodSeconds: 1800
containers:
- name: cassandra
image: gcr.io/google-samples/cassandra:v12
imagePullPolicy: Always
ports:
- containerPort: 7000
name: intra-node
- containerPort: 7001
name: tls-intra-node
- containerPort: 7199
name: jmx
- containerPort: 9042
name: cql
resources:
limits:
cpu: "500m"
memory: 1Gi
requests:
cpu: "500m"
memory: 1Gi
securityContext:
capabilities:
add:
- IPC_LOCK
lifecycle:
preStop:
exec:
command:
- /bin/sh
- -c
- nodetool drain
env:
- name: MAX_HEAP_SIZE
value: 512M
- name: HEAP_NEWSIZE
value: 100M
- name: CASSANDRA_SEEDS
value: "cassandra-0.cassandra.default.svc.cluster.local"
- name: CASSANDRA_CLUSTER_NAME
value: "K8Demo"
- name: CASSANDRA_DC
value: "DC1-K8Demo"
- name: CASSANDRA_RACK
value: "Rack1-K8Demo"
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
readinessProbe:
exec:
command:
- /bin/bash
- -c
- /ready-probe.sh
initialDelaySeconds: 15
timeoutSeconds: 5
volumeMounts:
- name: cassandra-data
mountPath: /cassandra_data
volumeClaimTemplates:
- metadata:
name: cassandra-data
spec:
accessModes: [ "ReadWriteOnce" ]
storageClassName: "fast"
resources:
requests:
storage: 5Gi
希望对您有所帮助。
使用头盔:
在 Mac:
brew install helm@2
brew link --force helm@2
helm init
避免 Kubernetes Helm 权限地狱: 来自:https://github.com/helm/helm/issues/2224:
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
卡桑德拉
孵化器:
helm repo add https://github.com/helm/charts/tree/master/incubator/cassandra
helm install --namespace "cassandra" -n "cassandra" incubator/cassandra
helm status "cassandra"
helm delete --purge "cassandra"
比特纳米:
helm repo add bitnami https://charts.bitnami.com/bitnami
helm install --namespace "cassandra" -n "my-deployment" bitnami/cassandra
helm status "my-deployment"
helm delete --purge "my-deployment"