如果运行的容器没有定义资源（memory、CPU）等限制，那么该容器可以使用宿主机的最大可用资源，直到无资源可用而触发宿主机（OOM Killer），为保证容器资源合理利用，需要在namespace定义LimitRange等限制，这样容器会继承LimitRange中的默认限制。
1、kubernetes对单个容器的memory实现资源限制
case1-pod-memory-limit.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: limit-test-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels: #rs or deployment
app: limit-test-pod
# matchExpressions:
# - {key: app, operator: In, values: [ng-deploy-80,ng-rs-81]}
template:
metadata:
labels:
app: limit-test-pod
spec:
containers:
- name: limit-test-container
image: lorel/docker-stress-ng
resources:
limits:
memory: "1024Mi"
requests:
memory: "1024Mi"
#command: ["stress"]
args: ["--vm", "3", "--vm-bytes", "256M"]
#nodeSelector:
# env: group1
kubectl apply -f case1-pod-memory-limit.yml
describe 看已生效
top查看也限制在1G以下
dashboard查看
2、kubernetes对单个容器的CPU及memory实现资源限制
cat case2-pod-memory-and-cpu-limit.yml
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: limit-test-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels: #rs or deployment
app: limit-test-pod
# matchExpressions:
# - {key: app, operator: In, values: [ng-deploy-80,ng-rs-81]}
template:
metadata:
labels:
app: limit-test-pod
spec:
containers:
- name: limit-test-container
image: lorel/docker-stress-ng
resources:
limits:
cpu: "2"
memory: "512Mi"
requests:
memory: "512M"
cpu: "2"
#command: ["stress"]
args: ["--vm", "3", "--vm-bytes", "256M"]
#nodeSelector:
# env: group1
top查看pod cpu、memory已经限制在2000毫核、512M范围
3、通过LimitRange对namespace进行限制
- 限制namespace中每个Pod或容器的最小与最大计算资源
- 限制namespace中每个Pod或容器计算资源request、limit之间的比例
- 限制namespace中每个存储卷声明（PersistentVolumeClaim）可使用的最小与最大存储空间
- 设置namespace中容器默认计算资源的request、limit，并在运行时自动注入到容器中
cat case3-LimitRange.yaml
apiVersion: v1
kind: LimitRange
metadata:
name: limitrange-magedu
namespace: magedu
spec:
limits:
- type: Container #限制的资源类型
max:
cpu: "2" #限制单个容器的最大CPU
memory: "2Gi" #限制单个容器的最大内存
min:
cpu: "500m" #限制单个容器的最小CPU
memory: "512Mi" #限制单个容器的最小内存
default:
cpu: "500m" #默认单个容器的CPU限制
memory: "512Mi" #默认单个容器的内存限制
defaultRequest:
cpu: "500m" #默认单个容器的CPU创建请求
memory: "512Mi" #默认单个容器的内存创建请求
maxLimitRequestRatio:
cpu: 2 #限制CPU limit/request比值最大为2
memory: 2 #限制内存limit/request比值最大为1.5
- type: Pod
max:
cpu: "4" #限制单个Pod的最大CPU
memory: "4Gi" #限制单个Pod最大内存
- type: PersistentVolumeClaim
max:
storage: 50Gi #限制PVC最大的requests.storage
min:
storage: 30Gi #限制PVC最小的requests.storage
4、kubernetes对cpu与内存RequestRatio比例限制
因为命名空间做了最大请求资源限制，当创建的pod 请超出最大范围时，pod无法创建成功
cat case4-pod-RequestRatio-limit.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
app: magedu-wordpress-deployment-label
name: magedu-wordpress-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-wordpress-selector
template:
metadata:
labels:
app: magedu-wordpress-selector
spec:
containers:
- name: magedu-wordpress-nginx-container
image: nginx:1.16.1
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
env:
- name: "password"
value: "123456"
- name: "age"
value: "18"
resources:
limits:
cpu: 1.5 #此时1.5超出requests请求数512m 2倍数值正常范围
memory: 1Gi
requests:
cpu: 512m
memory: 512Mi
- name: magedu-wordpress-php-container
image: php:5.6-fpm-alpine
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
env:
- name: "password"
value: "123456"
- name: "age"
value: "18"
resources:
limits:
cpu: 3
#cpu: 2
memory: 1Gi
requests:
cpu: 2000m
memory: 512Mi
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-wordpress-service-label
name: magedu-wordpress-service
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
nodePort: 30033
selector:
app: magedu-wordpress-selector
创建并观察pod与deployment，此时pod无法被创建，deployment ready个数为0
通过kubectl get deployments magedu-wordpress-deployment -n magedu -ojson 可以查看相关详情，发现有资源被限制提示~
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get deployment -n magedu magedu-wordpress-deployment -ojson
{
"apiVersion": "apps/v1",
"kind": "Deployment",
"metadata": {
"annotations": {
"deployment.kubernetes.io/revision": "2",
"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"apps/v1\",\"kind\":\"Deployment\",\"metadata\":{\"annotations\":{},\"labels\":{\"app\":\"magedu-wordpress-deployment-label\"},\"name\":\"magedu-wordpress-deployment\",\"namespace\":\"magedu\"},\"spec\":{\"replicas\":3,\"selector\":{\"matchLabels\":{\"app\":\"magedu-wordpress-selector\"}},\"template\":{\"metadata\":{\"labels\":{\"app\":\"magedu-wordpress-selector\"}},\"spec\":{\"containers\":[{\"env\":[{\"name\":\"password\",\"value\":\"123456\"},{\"name\":\"age\",\"value\":\"18\"}],\"image\":\"nginx:1.16.1\",\"imagePullPolicy\":\"Always\",\"name\":\"magedu-wordpress-nginx-container\",\"ports\":[{\"containerPort\":80,\"name\":\"http\",\"protocol\":\"TCP\"}],\"resources\":{\"limits\":{\"cpu\":1.5,\"memory\":\"1Gi\"},\"requests\":{\"cpu\":\"512m\",\"memory\":\"512Mi\"}}},{\"env\":[{\"name\":\"password\",\"value\":\"123456\"},{\"name\":\"age\",\"value\":\"18\"}],\"image\":\"php:5.6-fpm-alpine\",\"imagePullPolicy\":\"Always\",\"name\":\"magedu-wordpress-php-container\",\"ports\":[{\"containerPort\":80,\"name\":\"http\",\"protocol\":\"TCP\"}],\"resources\":{\"limits\":{\"cpu\":2,\"memory\":\"1Gi\"},\"requests\":{\"cpu\":\"2000m\",\"memory\":\"512Mi\"}}}]}}}}\n"
},
"creationTimestamp": "2022-08-25T14:58:59Z",
"generation": 2,
"labels": {
"app": "magedu-wordpress-deployment-label"
},
"name": "magedu-wordpress-deployment",
"namespace": "magedu",
"resourceVersion": "5424603",
"uid": "23be6ba8-003e-4454-9490-77e41af3220b"
},
"spec": {
"progressDeadlineSeconds": 600,
"replicas": 3,
"revisionHistoryLimit": 10,
"selector": {
"matchLabels": {
"app": "magedu-wordpress-selector"
}
},
"strategy": {
"rollingUpdate": {
"maxSurge": "25%",
"maxUnavailable": "25%"
},
"type": "RollingUpdate"
},
"template": {
"metadata": {
"creationTimestamp": null,
"labels": {
"app": "magedu-wordpress-selector"
}
},
"spec": {
"containers": [
{
"env": [
{
"name": "password",
"value": "123456"
},
{
"name": "age",
"value": "18"
}
],
"image": "nginx:1.16.1",
"imagePullPolicy": "Always",
"name": "magedu-wordpress-nginx-container",
"ports": [
{
"containerPort": 80,
"name": "http",
"protocol": "TCP"
}
],
"resources": {
"limits": {
"cpu": "1500m",
"memory": "1Gi"
},
"requests": {
"cpu": "512m",
"memory": "512Mi"
}
},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File"
},
{
"env": [
{
"name": "password",
"value": "123456"
},
{
"name": "age",
"value": "18"
}
],
"image": "php:5.6-fpm-alpine",
"imagePullPolicy": "Always",
"name": "magedu-wordpress-php-container",
"ports": [
{
"containerPort": 80,
"name": "http",
"protocol": "TCP"
}
],
"resources": {
"limits": {
"cpu": "2",
"memory": "1Gi"
},
"requests": {
"cpu": "2",
"memory": "512Mi"
}
},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File"
}
],
"dnsPolicy": "ClusterFirst",
"restartPolicy": "Always",
"schedulerName": "default-scheduler",
"securityContext": {},
"terminationGracePeriodSeconds": 30
}
}
},
"status": {
"conditions": [
{
"lastTransitionTime": "2022-08-25T14:58:59Z",
"lastUpdateTime": "2022-08-25T14:58:59Z",
"message": "Deployment does not have minimum availability.",
"reason": "MinimumReplicasUnavailable",
"status": "False",
"type": "Available"
},
{
"lastTransitionTime": "2022-08-25T14:58:59Z",
"lastUpdateTime": "2022-08-25T14:58:59Z",
"message": "pods \"magedu-wordpress-deployment-564d449cb-vncg9\" is forbidden: [maximum cpu usage per Container is 2, but limit is 2500m, cpu max limit to request ratio per Container is 2, but provided ratio is 3.125000, maximum cpu usage per Container is 2, but limit is 3, maximum cpu usage per Pod is 4, but limit is 5500m]",
"reason": "FailedCreate",
"status": "True",
"type": "ReplicaFailure"
},
{
"lastTransitionTime": "2022-08-25T15:22:42Z",
"lastUpdateTime": "2022-08-25T15:22:42Z",
"message": "Created new replica set \"magedu-wordpress-deployment-7f8fd59b68\"",
"reason": "NewReplicaSetCreated",
"status": "True",
"type": "Progressing"
}
],
"observedGeneration": 2,
"unavailableReplicas": 4
}
}
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case#
View Code
当cpu 512m 设置为800m ，2*800m=1600m 大于resource cpu 限制1.5，小于命名空间限制数值2，pod被正常创建
cat case5-pod-cpu-limit.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
app: magedu-wordpress-deployment-label
name: magedu-wordpress-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-wordpress-selector
template:
metadata:
labels:
app: magedu-wordpress-selector
spec:
containers:
- name: magedu-wordpress-nginx-container
image: nginx:1.16.1
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
env:
- name: "password"
value: "123456"
- name: "age"
value: "18"
resources:
limits:
cpu: 1.5
memory: 1Gi
requests:
cpu: 800m
memory: 512Mi
- name: magedu-wordpress-php-container
image: php:5.6-fpm-alpine
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
env:
- name: "password"
value: "123456"
- name: "age"
value: "18"
resources:
limits:
cpu: 2.8
#cpu: 2
memory: 1Gi
requests:
cpu: 1.5
memory: 512Mi
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-wordpress-service-label
name: magedu-wordpress-service
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
nodePort: 30033
selector:
app: magedu-wordpress-selector
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# grep -A 5 limits case4-pod-RequestRatio-limit.yaml
limits:
cpu: 1.5
memory: 1Gi
requests:
cpu: 512m
memory: 512Mi
--
limits:
cpu: 2
#cpu: 2
memory: 1Gi
requests:
cpu: 2000m
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get pod -n magedu
NAME READY STATUS RESTARTS AGE
deploy-devops-redis-69f975f65d-nmmdk 1/1 Running 0 5d6h
limit-test-deployment-6b84745dc8-cxbfb 1/1 Running 2 (8h ago) 2d8h
magedu-tomcat-app1-deployment-68b54f67d4-8sfff 2/2 Running 20 (15m ago) 13h
magedu-tomcat-app1-deployment-68b54f67d4-crkdt 2/2 Running 21 (14m ago) 13h
magedu-tomcat-app1-deployment-68b54f67d4-q45fq 2/2 Running 19 (17m ago) 13h
mysql-0 2/2 Running 0 2d23h
mysql-1 2/2 Running 0 2d23h
mysql-2 2/2 Running 0 2d23h
redis-0 1/1 Running 0 4d23h
redis-1 1/1 Running 0 4d23h
redis-2 1/1 Running 0 4d23h
redis-3 1/1 Running 0 4d23h
redis-4 1/1 Running 0 4d23h
redis-5 1/1 Running 0 4d23h
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get deployments -n magedu
NAME READY UP-TO-DATE AVAILABLE AGE
deploy-devops-redis 1/1 1 1 5d6h
limit-test-deployment 1/1 1 1 2d8h
magedu-tomcat-app1-deployment 3/3 3 3 13h
magedu-wordpress-deployment 0/3 0 0 29m
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# vi case4-pod-RequestRatio-limit.yaml
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# grep -A 5 limits case5-pod-cpu-limit.yaml
limits:
cpu: 1.5
memory: 1Gi
requests:
cpu: 800m
memory: 512Mi
--
limits:
cpu: 2
#cpu: 2
memory: 1Gi
requests:
cpu: 2000m
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl apply -f case5-pod-cpu-limit.yaml
deployment.apps/magedu-wordpress-deployment configured
service/magedu-wordpress-service unchanged
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get deployments -n magedu
NAME READY UP-TO-DATE AVAILABLE AGE
deploy-devops-redis 1/1 1 1 5d6h
limit-test-deployment 1/1 1 1 2d8h
magedu-tomcat-app1-deployment 3/3 3 3 13h
magedu-wordpress-deployment 3/3 3 3 30m
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get pod -n magedu
NAME READY STATUS RESTARTS AGE
deploy-devops-redis-69f975f65d-nmmdk 1/1 Running 0 5d6h
limit-test-deployment-6b84745dc8-cxbfb 1/1 Running 2 (8h ago) 2d8h
magedu-tomcat-app1-deployment-68b54f67d4-8sfff 2/2 Running 20 (17m ago) 13h
magedu-tomcat-app1-deployment-68b54f67d4-crkdt 2/2 Running 21 (16m ago) 13h
magedu-tomcat-app1-deployment-68b54f67d4-q45fq 2/2 Running 19 (19m ago) 13h
magedu-wordpress-deployment-67598dcbc6-7q7zd 2/2 Running 0 26s
magedu-wordpress-deployment-67598dcbc6-bb7d4 2/2 Running 0 34s
magedu-wordpress-deployment-67598dcbc6-qbbn4 2/2 Running 0 45s
mysql-0 2/2 Running 0 2d23h
mysql-1 2/2 Running 0 2d23h
mysql-2 2/2 Running 0 2d23h
redis-0 1/1 Running 0 4d23h
redis-1 1/1 Running 0 4d23h
redis-2 1/1 Running 0 4d23h
redis-3 1/1 Running 0 4d23h
redis-4 1/1 Running 0 4d23h
redis-5 1/1 Running 0 4d23h
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case#
5、限定某个对象类型(pod、service)可创建的总数
清掉之前设置的环境参数，保持一个干净的环境
kubectl delete -f case1-pod-memory-limit.yml -f case2-pod-memory-and-cpu-limit.yml kubectl delete -f case4-pod-RequestRatio-limit.yaml case5-pod-cpu-limit.yaml
cat case6-ResourceQuota-magedu.yaml
apiVersion: v1
kind: ResourceQuota
metadata:
name: quota-magedu
namespace: magedu
spec:
hard:
requests.cpu: "8"
limits.cpu: "8"
requests.memory: 8Gi
limits.memory: 8Gi
requests.nvidia.com/gpu: 4
pods: "6"
services: "6"
针对后期创建pod个数做限制
创建pod测试
cat case7-namespace-pod-limit-test.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
app: magedu-nginx-deployment-label
name: magedu-nginx-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-nginx-selector
template:
metadata:
labels:
app: magedu-nginx-selector
spec:
containers:
- name: magedu-nginx-container
image: nginx:1.16.1
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
env:
- name: "password"
value: "123456"
- name: "age"
value: "18"
resources:
limits:
cpu: 1
memory: 1Gi
requests:
cpu: 500m
memory: 512Mi
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-nginx-service-label
name: magedu-nginx-service
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
nodePort: 30033
selector:
app: magedu-nginx-selector
此时创建pod失败，提示超出资源限制请求，pod个数已经被占用
修改magedu namespace资源限制
cat case6-ResourceQuota-magedu.yaml
apiVersion: v1
kind: ResourceQuota
metadata:
name: quota-magedu
namespace: magedu
spec:
hard:
requests.cpu: "20"
limits.cpu: "20"
requests.memory: 20Gi
limits.memory: 20Gi
requests.nvidia.com/gpu: 10
pods: "20"
services: "20"
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# vi case6-ResourceQuota-magedu.yaml root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl apply -f case6-ResourceQuota-magedu.yaml resourcequota/quota-magedu configured root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl describe ns -n magedu magedu Name: magedu Labels: kubernetes.io/metadata.name=magedu Annotations: <none> Status: Active Resource Quotas Name: quota-magedu Resource Used Hard -------- --- --- limits.cpu 4500m 20 limits.memory 3Gi 20Gi pods 13 20 requests.cpu 7800m 20 requests.memory 9444Mi 20Gi requests.nvidia.com/gpu 0 10 services 6 20 No LimitRange resource. root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl apply -f case7-namespace-pod-limit-test.yaml deployment.apps/magedu-nginx-deployment configured service/magedu-nginx-service created root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get pod -n magedu NAME READY STATUS RESTARTS AGE deploy-devops-redis-69f975f65d-nmmdk 1/1 Running 0 5d7h magedu-nginx-deployment-658df6889f-qnqm7 1/1 Running 0 2m19s magedu-nginx-deployment-658df6889f-tntkx 1/1 Running 0 2m19s magedu-tomcat-app1-deployment-68b54f67d4-8sfff 2/2 Running 21 (2m52s ago) 14h magedu-tomcat-app1-deployment-68b54f67d4-crkdt 2/2 Running 22 (21m ago) 14h magedu-tomcat-app1-deployment-68b54f67d4-q45fq 2/2 Running 22 (14m ago) 14h mysql-0 2/2 Running 0 3d mysql-1 2/2 Running 0 3d mysql-2 2/2 Running 0 3d redis-0 1/1 Running 0 5d redis-1 1/1 Running 0 5d redis-2 1/1 Running 0 5d redis-3 1/1 Running 0 5d redis-4 1/1 Running 0 5d redis-5 1/1 Running 0 5d root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case#
新建文件让其超出namespace限制的cpu、内存
cat case8-namespace-cpu-limit-test.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
app: magedu-nginx-deployment-label
name: magedu-nginx-deployment
namespace: magedu
spec:
replicas: 3
selector:
matchLabels:
app: magedu-nginx-selector
template:
metadata:
labels:
app: magedu-nginx-selector
spec:
containers:
- name: magedu-nginx-container
image: nginx:1.16.1
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
env:
- name: "password"
value: "123456"
- name: "age"
value: "18"
resources:
limits:
cpu: 8
memory: 4Gi
requests:
cpu: 4
memory: 4Gi
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-nginx-service-label
name: magedu-nginx-service
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
nodePort: 30033
selector:
app: magedu-nginx-selector
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl describe ns -n magedu magedu Name: magedu Labels: kubernetes.io/metadata.name=magedu Annotations: <none> Status: Active Resource Quotas Name: quota-magedu Resource Used Hard -------- --- --- limits.cpu 6500m 20 limits.memory 5Gi 20Gi pods 15 20 requests.cpu 8800m 20 requests.memory 10468Mi 20Gi requests.nvidia.com/gpu 0 10 services 7 20 No LimitRange resource. root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# vi case8-namespace-cpu-limit-test.yaml root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl apply -f case8-namespace-cpu-limit-test.yaml deployment.apps/magedu-nginx-deployment configured service/magedu-nginx-service unchanged
此时pod已经无法在创建了
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get pod -n magedu NAME READY STATUS RESTARTS AGE deploy-devops-redis-69f975f65d-nmmdk 1/1 Running 0 5d7h magedu-nginx-deployment-658df6889f-tntkx 1/1 Running 0 8m41s magedu-nginx-deployment-7c8f464cfc-frplk 1/1 Running 0 41s magedu-tomcat-app1-deployment-68b54f67d4-8sfff 2/2 Running 21 (9m14s ago) 14h magedu-tomcat-app1-deployment-68b54f67d4-crkdt 2/2 Running 22 (28m ago) 14h magedu-tomcat-app1-deployment-68b54f67d4-q45fq 2/2 Running 23 (43s ago) 14h mysql-0 2/2 Running 0 3d mysql-1 2/2 Running 0 3d mysql-2 2/2 Running 0 3d redis-0 1/1 Running 0 5d redis-1 1/1 Running 0 5d redis-2 1/1 Running 0 5d redis-3 1/1 Running 0 5d redis-4 1/1 Running 0 5d redis-5 1/1 Running 0 5d root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case#
查看deployments 可以提示资源限制
kubectl get deployment -n magedu magedu-nginx-deployment -o json
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case# kubectl get deployment -n magedu magedu-nginx-deployment -o json
{
"apiVersion": "apps/v1",
"kind": "Deployment",
"metadata": {
"annotations": {
"deployment.kubernetes.io/revision": "2",
"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"apps/v1\",\"kind\":\"Deployment\",\"metadata\":{\"annotations\":{},\"labels\":{\"app\":\"magedu-nginx-deployment-label\"},\"name\":\"magedu-nginx-deployment\",\"namespace\":\"magedu\"},\"spec\":{\"replicas\":3,\"selector\":{\"matchLabels\":{\"app\":\"magedu-nginx-selector\"}},\"template\":{\"metadata\":{\"labels\":{\"app\":\"magedu-nginx-selector\"}},\"spec\":{\"containers\":[{\"env\":[{\"name\":\"password\",\"value\":\"123456\"},{\"name\":\"age\",\"value\":\"18\"}],\"image\":\"nginx:1.16.1\",\"imagePullPolicy\":\"Always\",\"name\":\"magedu-nginx-container\",\"ports\":[{\"containerPort\":80,\"name\":\"http\",\"protocol\":\"TCP\"}],\"resources\":{\"limits\":{\"cpu\":8,\"memory\":\"4Gi\"},\"requests\":{\"cpu\":4,\"memory\":\"4Gi\"}}}]}}}}\n"
},
"creationTimestamp": "2022-08-25T16:09:16Z",
"generation": 4,
"labels": {
"app": "magedu-nginx-deployment-label"
},
"name": "magedu-nginx-deployment",
"namespace": "magedu",
"resourceVersion": "5435774",
"uid": "7a034e10-8740-4a86-b067-3eba9549c717"
},
"spec": {
"progressDeadlineSeconds": 600,
"replicas": 3,
"revisionHistoryLimit": 10,
"selector": {
"matchLabels": {
"app": "magedu-nginx-selector"
}
},
"strategy": {
"rollingUpdate": {
"maxSurge": "25%",
"maxUnavailable": "25%"
},
"type": "RollingUpdate"
},
"template": {
"metadata": {
"creationTimestamp": null,
"labels": {
"app": "magedu-nginx-selector"
}
},
"spec": {
"containers": [
{
"env": [
{
"name": "password",
"value": "123456"
},
{
"name": "age",
"value": "18"
}
],
"image": "nginx:1.16.1",
"imagePullPolicy": "Always",
"name": "magedu-nginx-container",
"ports": [
{
"containerPort": 80,
"name": "http",
"protocol": "TCP"
}
],
"resources": {
"limits": {
"cpu": "8",
"memory": "4Gi"
},
"requests": {
"cpu": "4",
"memory": "4Gi"
}
},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File"
}
],
"dnsPolicy": "ClusterFirst",
"restartPolicy": "Always",
"schedulerName": "default-scheduler",
"securityContext": {},
"terminationGracePeriodSeconds": 30
}
}
},
"status": {
"availableReplicas": 2,
"conditions": [
{
"lastTransitionTime": "2022-08-25T16:20:13Z",
"lastUpdateTime": "2022-08-25T16:28:19Z",
"message": "ReplicaSet \"magedu-nginx-deployment-7c8f464cfc\" is progressing.",
"reason": "ReplicaSetUpdated",
"status": "True",
"type": "Progressing"
},
{
"lastTransitionTime": "2022-08-25T16:28:19Z",
"lastUpdateTime": "2022-08-25T16:28:19Z",
"message": "pods \"magedu-nginx-deployment-7c8f464cfc-xjl7d\" is forbidden: exceeded quota: quota-magedu, requested: limits.cpu=8, used: limits.cpu=14500m, limited: limits.cpu=20",
"reason": "FailedCreate",
"status": "True",
"type": "ReplicaFailure"
},
{
"lastTransitionTime": "2022-08-25T16:29:23Z",
"lastUpdateTime": "2022-08-25T16:29:23Z",
"message": "Deployment does not have minimum availability.",
"reason": "MinimumReplicasUnavailable",
"status": "False",
"type": "Available"
}
],
"observedGeneration": 4,
"readyReplicas": 2,
"replicas": 2,
"unavailableReplicas": 2,
"updatedReplicas": 1
}
}
root@easzlab-deploy:~/20220821-case/20220821/magedu-limit-case#
View Code
