【发布时间】：2018-06-13 17:12:11
【问题描述】：
我为不同的项目安装了 2 个 kubernetes，据我所知，它们在重要的领域具有相同的配置，但 2 个执行滚动更新的方式不同。
两者都是使用 kops 安装在 AWS 上的。
系统 1 (k8s v1.7.0) - 使用 k8s web gui 在部署中杀死 pod，首先创建新 pod，然后一旦运行将终止旧 pod。没有停机时间。
System 2 (k8s v1.8.4) - 使用 k8s web gui 在部署中杀死 pod，旧的 pod 立即被杀死，然后创建新的 pod。导致短暂停机。
关于它们为何表现不同以及如何让系统 2 在终止旧 pod 之前创建新 pod 有任何建议或想法吗？
系统 1 部署
{
"kind": "Deployment",
"apiVersion": "extensions/v1beta1",
"metadata": {
"name": "proxy-deployment",
"namespace": "namespace",
"selfLink": "/apis/extensions/v1beta1/namespaces/namespace/deployments/proxy-deployment",
"uid": "d12778ba-8950-11e7-9e69-12f38e55b21a",
"resourceVersion": "31538492",
"generation": 7,
"creationTimestamp": "2017-08-25T04:49:45Z",
"labels": {
"app": "proxy"
},
"annotations": {
"deployment.kubernetes.io/revision": "6",
"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"apps/v1beta1\",\"kind\":\"Deployment\",\"metadata\":{\"annotations\":{},\"name\":\"proxy-deployment\",\"namespace\":\"namespace\"},\"spec\":{\"replicas\":2,\"template\":{\"metadata\":{\"labels\":{\"app\":\"proxy\"}},\"spec\":{\"containers\":[{\"image\":\"xxxxxxxxxxx.dkr.ecr.us-east-1.amazonaws.com/nginx-proxy-xxxxxx:latest\",\"name\":\"proxy-ctr\",\"ports\":[{\"containerPort\":80},{\"containerPort\":8080}]}]}}}}\n"
}
},
"spec": {
"replicas": 1,
"selector": {
"matchLabels": {
"app": "proxy"
}
},
"template": {
"metadata": {
"creationTimestamp": null,
"labels": {
"app": "proxy",
"date": "1522386390"
}
},
"spec": {
"containers": [
{
"name": "proxy-ctr",
"image": "xxxxxxxxxxx.dkr.ecr.us-east-1.amazonaws.com/nginx-proxy-xxxxxx:latest",
"ports": [
{
"containerPort": 80,
"protocol": "TCP"
},
{
"containerPort": 8080,
"protocol": "TCP"
}
],
"resources": {},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File",
"imagePullPolicy": "Always"
}
],
"restartPolicy": "Always",
"terminationGracePeriodSeconds": 30,
"dnsPolicy": "ClusterFirst",
"securityContext": {},
"schedulerName": "default-scheduler"
}
},
"strategy": {
"type": "RollingUpdate",
"rollingUpdate": {
"maxUnavailable": "25%",
"maxSurge": "25%"
}
},
"revisionHistoryLimit": 2,
"progressDeadlineSeconds": 600
},
"status": {
"observedGeneration": 7,
"replicas": 1,
"updatedReplicas": 1,
"readyReplicas": 1,
"availableReplicas": 1,
"conditions": [
{
"type": "Progressing",
"status": "True",
"lastUpdateTime": "2018-03-30T05:03:01Z",
"lastTransitionTime": "2017-08-25T04:49:45Z",
"reason": "NewReplicaSetAvailable",
"message": "ReplicaSet \"proxy-deployment-1457650622\" has successfully progressed."
},
{
"type": "Available",
"status": "True",
"lastUpdateTime": "2018-06-01T06:55:12Z",
"lastTransitionTime": "2018-06-01T06:55:12Z",
"reason": "MinimumReplicasAvailable",
"message": "Deployment has minimum availability."
}
]
}
}
系统 2 部署
{
"kind": "Deployment",
"apiVersion": "extensions/v1beta1",
"metadata": {
"name": "prodefault-deployment",
"namespace": "namespace",
"selfLink": "/apis/extensions/v1beta1/namespaces/namespace/deployments/prodefault-deployment",
"uid": "a80528c8-eb79-11e7-9364-068125440f70",
"resourceVersion": "25203392",
"generation": 10,
"creationTimestamp": "2017-12-28T02:49:00Z",
"labels": {
"app": "prodefault"
},
"annotations": {
"deployment.kubernetes.io/revision": "7",
"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"apps/v1beta1\",\"kind\":\"Deployment\",\"metadata\":{\"annotations\":{},\"name\":\"prodefault-deployment\",\"namespace\":\"namespace\"},\"spec\":{\"replicas\":1,\"strategy\":{\"rollingUpdate\":{\"maxSurge\":\"25%\",\"maxUnavailable\":\"25%\"},\"type\":\"RollingUpdate\"},\"template\":{\"metadata\":{\"labels\":{\"app\":\"prodefault\"}},\"spec\":{\"containers\":[{\"image\":\"xxxxxxxxxxxx.dkr.ecr.us-west-2.amazonaws.com/xxxxxxxxxxx-pro-default:latest\",\"livenessProbe\":{\"httpGet\":{\"path\":\"/healthchk\",\"port\":80},\"initialDelaySeconds\":120,\"periodSeconds\":15,\"timeoutSeconds\":1},\"name\":\"prodefault-ctr\",\"ports\":[{\"containerPort\":80}],\"readinessProbe\":{\"httpGet\":{\"path\":\"/healthchk\",\"port\":80},\"initialDelaySeconds\":5,\"periodSeconds\":2,\"timeoutSeconds\":3},\"resources\":{\"limits\":{\"cpu\":\"1\",\"memory\":\"1024Mi\"},\"requests\":{\"cpu\":\"150m\",\"memory\":\"256Mi\"}},\"volumeMounts\":[{\"mountPath\":\"/var/www/html/homes\",\"name\":\"efs-pvc\"},{\"mountPath\":\"/var/xero\",\"name\":\"xero-key\",\"readOnly\":true},{\"mountPath\":\"/var/gcal\",\"name\":\"gcal-json\",\"readOnly\":true}]}],\"volumes\":[{\"name\":\"efs-pvc\",\"persistentVolumeClaim\":{\"claimName\":\"tio-pv-claim-homes\"}},{\"name\":\"xero-key\",\"secret\":{\"secretName\":\"xero-key\"}},{\"name\":\"gcal-json\",\"secret\":{\"secretName\":\"gcaljson\"}}]}}}}\n"
}
},
"spec": {
"replicas": 1,
"selector": {
"matchLabels": {
"app": "prodefault"
}
},
"template": {
"metadata": {
"creationTimestamp": null,
"labels": {
"app": "prodefault"
}
},
"spec": {
"volumes": [
{
"name": "efs-pvc",
"persistentVolumeClaim": {
"claimName": "tio-pv-claim-homes"
}
},
{
"name": "xero-key",
"secret": {
"secretName": "xero-key",
"defaultMode": 420
}
},
{
"name": "gcal-json",
"secret": {
"secretName": "gcaljson",
"defaultMode": 420
}
}
],
"containers": [
{
"name": "prodefault-ctr",
"image": "xxxxxxxxxxxx.dkr.ecr.us-west-2.amazonaws.com/xxxxxxxxxxx-pro-default:latest",
"ports": [
{
"containerPort": 80,
"protocol": "TCP"
}
],
"resources": {
"limits": {
"cpu": "1",
"memory": "1Gi"
},
"requests": {
"cpu": "150m",
"memory": "256Mi"
}
},
"volumeMounts": [
{
"name": "efs-pvc",
"mountPath": "/var/www/html/homes"
},
{
"name": "xero-key",
"readOnly": true,
"mountPath": "/var/xero"
},
{
"name": "gcal-json",
"readOnly": true,
"mountPath": "/var/gcal"
}
],
"livenessProbe": {
"httpGet": {
"path": "/healthchk",
"port": 80,
"scheme": "HTTP"
},
"initialDelaySeconds": 120,
"timeoutSeconds": 1,
"periodSeconds": 15,
"successThreshold": 1,
"failureThreshold": 3
},
"readinessProbe": {
"httpGet": {
"path": "/healthchk",
"port": 80,
"scheme": "HTTP"
},
"initialDelaySeconds": 5,
"timeoutSeconds": 3,
"periodSeconds": 2,
"successThreshold": 1,
"failureThreshold": 3
},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File",
"imagePullPolicy": "Always"
}
],
"restartPolicy": "Always",
"terminationGracePeriodSeconds": 30,
"dnsPolicy": "ClusterFirst",
"securityContext": {},
"schedulerName": "default-scheduler"
}
},
"strategy": {
"type": "RollingUpdate",
"rollingUpdate": {
"maxUnavailable": "25%",
"maxSurge": "25%"
}
},
"revisionHistoryLimit": 2,
"progressDeadlineSeconds": 600
},
"status": {
"observedGeneration": 10,
"replicas": 1,
"updatedReplicas": 1,
"readyReplicas": 1,
"availableReplicas": 1,
"conditions": [
{
"type": "Progressing",
"status": "True",
"lastUpdateTime": "2018-01-15T06:07:52Z",
"lastTransitionTime": "2017-12-28T03:00:16Z",
"reason": "NewReplicaSetAvailable",
"message": "ReplicaSet \"prodefault-deployment-9685f46d4\" has successfully progressed."
},
{
"type": "Available",
"status": "True",
"lastUpdateTime": "2018-06-13T07:12:41Z",
"lastTransitionTime": "2018-06-13T07:12:41Z",
"reason": "MinimumReplicasAvailable",
"message": "Deployment has minimum availability."
}
]
}
}
【问题讨论】：
-
所以你试图通过杀死 pod 来执行滚动更新？通常的方法是“kubectl set image”或“kubectl apply”
-
apply 或 set image 都没有任何效果，因为 :latest 在 kubectl 所知的情况下没有改变。在仪表板中杀死 pod 在 1.7 安装中始终有效，然后从存储库中获取真正的最新版本
-
是的，您必须更改图像 - 如果您只有“最新”标签，您应该使用图像的摘要。见kubernetes.io/docs/concepts/configuration/overview/…
标签： kubernetes kops