k8s的HTTP接口使用
# 查看当前集群支持的API版本
$ curl -s 10.0.0.120:8080/api/ | jq -r .versions
# 查看指定API的资源操作类型 返回一个字典列表
$ curl -s 10.0.0.120:8080/api/v1/ | jq keys
[
"groupVersion",
"kind",
"resources"
]
# 查看当前k8s集群支持的操作类型
curl -s 10.0.0.120:8080/api/v1/ | jq .resources | grep "name\b"
"name": "bindings",
"name": "componentstatuses",
"name": "configmaps",
"name": "endpoints",
"name": "events",
"name": "limitranges",
"name": "namespaces",
"name": "namespaces/finalize",
"name": "namespaces/status",
"name": "nodes",
"name": "nodes/proxy",
"name": "nodes/status",
"name": "persistentvolumeclaims",
"name": "persistentvolumeclaims/status",
"name": "persistentvolumes",
"name": "persistentvolumes/status",
"name": "pods",
"name": "pods/attach",
"name": "pods/binding",
"name": "pods/eviction",
"name": "pods/exec",
"name": "pods/log",
"name": "pods/portforward",
"name": "pods/proxy",
"name": "pods/status",
"name": "podtemplates",
"name": "replicationcontrollers",
"name": "replicationcontrollers/scale",
"name": "replicationcontrollers/status",
"name": "resourcequotas",
"name": "resourcequotas/status",
"name": "secrets",
"name": "serviceaccounts",
"name": "services",
"name": "services/proxy",
"name": "services/status",
# 常用的，需要关注的几个资源类型 【namespaces|nodes|pods|podtemplates|replicationcontrollers|services|secrets】
# 查看某个namespace的URL
$ curl -s 10.0.0.120:8080/api/v1/namespaces/ | jq .items | jq values[0] | grep -E '(name|selfLink)'
"name": "default",
"selfLink": "/api/v1/namespaces/default",
# 查看namespace详情
$ curl -s 10.0.0.120:8080/api/v1/namespaces/default | jq .spec
{
"finalizers": [
"kubernetes"
]
}
# 查看全部node
$ curl -s 10.0.0.120:8080/api/v1/nodes | jq .items | grep -E "\bname\b|selfLink"
"name": "172.25.47.138",
"selfLink": "/api/v1/nodes/172.25.47.138",
"name": "172.25.47.202",
"selfLink": "/api/v1/nodes/172.25.47.202",
"name": "172.25.47.75",
"selfLink": "/api/v1/nodes/172.25.47.75",
"name": "10.0.0.121",
"selfLink": "/api/v1/nodes/10.0.0.121",
"name": "10.0.0.122",
"selfLink": "/api/v1/nodes/10.0.0.122",
# 查看某个node详情【当前该节点的资源信息以及设置限制条件，当前节点运行的pod容器以及镜像相关信息】
$ curl -s 10.0.0.120:8080/api/v1/nodes/10.0.0.122 | jq .status
{
"capacity": {
"cpu": "4",
"ephemeral-storage": "14987616Ki",
"hugepages-2Mi": "0",
"memory": "6627524Ki",
"pods": "110"
},
"allocatable": {
"cpu": "4",
"ephemeral-storage": "13812586883",
"hugepages-2Mi": "0",
"memory": "6525124Ki",
"pods": "110"
},
"conditions": [
{
"type": "OutOfDisk",
"status": "False",
"lastHeartbeatTime": "2018-07-19T03:15:50Z",
"lastTransitionTime": "2018-06-28T01:59:06Z",
"reason": "KubeletHasSufficientDisk",
"message": "kubelet has sufficient disk space available"
},
{
"type": "MemoryPressure",
"status": "False",
"lastHeartbeatTime": "2018-07-19T03:15:50Z",
"lastTransitionTime": "2018-06-28T01:59:06Z",
"reason": "KubeletHasSufficientMemory",
"message": "kubelet has sufficient memory available"
},
{
"type": "DiskPressure",
"status": "False",
"lastHeartbeatTime": "2018-07-19T03:15:50Z",
"lastTransitionTime": "2018-06-28T01:59:06Z",
"reason": "KubeletHasNoDiskPressure",
"message": "kubelet has no disk pressure"
},
{
"type": "PIDPressure",
"status": "False",
"lastHeartbeatTime": "2018-07-19T03:15:50Z",
"lastTransitionTime": "2018-06-28T01:59:06Z",
"reason": "KubeletHasSufficientPID",
"message": "kubelet has sufficient PID available"
},
{
"type": "Ready",
"status": "True",
"lastHeartbeatTime": "2018-07-19T03:15:50Z",
"lastTransitionTime": "2018-07-18T08:18:31Z",
"reason": "KubeletReady",
"message": "kubelet is posting ready status"
}
],
"addresses": [
{
"type": "InternalIP",
"address": "10.0.0.122"
},
{
"type": "Hostname",
"address": "10.0.0.122"
}
],
"daemonEndpoints": {
"kubeletEndpoint": {
"Port": 10250
}
},
"nodeInfo": {
"machineID": "cd7f16da1665b7cee74f46122e2d7cdd",
"systemUUID": "0E96FBAF-C214-18F8-D9E6-8B65B9B5A413",
"bootID": "f67f0185-4be6-41d0-b5e0-d126165f6986",
"kernelVersion": "3.10.0-327.el7.x86_64",
"osImage": "CentOS Linux 7 (Core)",
"containerRuntimeVersion": "docker://1.12.6",
"kubeletVersion": "v1.10.4",
"kubeProxyVersion": "v1.10.4",
"operatingSystem": "linux",
"architecture": "amd64"
},
"images": [
{
"names": [
"dockerhub.jd.com/wolf/fe-wolf@sha256:0b155e99f27de990cfd3a5f96bcc13b820530cf1236b96ca5d87efae4f65f62a",
"dockerhub.jd.com/wolf/fe-wolf:latest"
],
"sizeBytes": 352597644
},
{
"names": [
"xxbandy123/go-web@sha256:c375b479a74b0ec77608a221a28ddc4589149d55a04845eac697903add557c30",
"xxbandy123/go-web:latest"
],
"sizeBytes": 338268706
},
{
"names": [
"dockerhub.jd.com/gcr_mirror/pause-amd64@sha256:fcaff905397ba63fd376d0c3019f1f1cb6e7506131389edbcb3d22719f1ae54d",
"dockerhub.jd.com/gcr_mirror/pause-amd64:3.1"
],
"sizeBytes": 742472
}
]
}
# 查看pod相关信息【由于一般k8s是不建议使用pod类型来直接控制容器的，因此这个接口直接查没什么意义】
# 查看apis group相关信息
curl -s 10.0.0.120:8080/apis/extensions/v1beta1 | grep "\bname\b"
"name": "daemonsets",
"name": "daemonsets/status",
"name": "deployments",
"name": "deployments/rollback",
"name": "deployments/scale",
"name": "deployments/status",
"name": "ingresses",
"name": "ingresses/status",
"name": "networkpolicies",
"name": "podsecuritypolicies",
"name": "replicasets",
"name": "replicasets/scale",
"name": "replicasets/status",
"name": "replicationcontrollers",
"name": "replicationcontrollers/scale",
$ curl -s 10.0.0.120:8080/apis/apps/v1beta1 | grep "\bname\b"
"name": "controllerrevisions",
"name": "deployments",
"name": "deployments/rollback",
"name": "deployments/scale",
"name": "deployments/status",
"name": "statefulsets",
"name": "statefulsets/scale",
"name": "statefulsets/status",
# 查看控制器对应的控制器信息【statefulset,deployment】 这些控制器的信息一般在/apis/apps/下
# job和cronjob一般会在/apis/batch/下
$ curl -s 10.0.0.120:8080/apis/batch/v1 | grep "\bname\b"
"name": "jobs",
"name": "jobs/status",
curl -s 10.0.0.120:8080/apis/batch/v1/jobs | jq -r .items | grep name
"name": "image-build-service",
"namespace": "default",
"selfLink": "/apis/batch/v1/namespaces/default/jobs/image-build-service",
"job-name": "image-build-service"
"name": "image-build-service",
"job-name": "image-build-service"
"name": "hosts",
"name": "image-build-service",
"name": "dockerhost",
"name": "branch",
"name": "giturl",
"name": "app",
"name": "dockerfiledir",
"name": "hosts",
# 查看当前/apis/apps/支持的apiversion
$ curl -s 10.0.0.120:8080/apis/apps | jq .versions |grep "groupVersion"
"groupVersion": "apps/v1",
"groupVersion": "apps/v1beta2",
"groupVersion": "apps/v1beta1",
# 查看应用的api支持的相关资源类型 【daemonsets|deployments|replicasets|statefulsets】
$ curl -s 10.0.0.120:8080/apis/apps/v1 | jq .resources | grep "name\b"
"name": "controllerrevisions",
"name": "daemonsets",
"name": "daemonsets/status",
"name": "deployments",
"name": "deployments/scale",
"name": "deployments/status",
"name": "replicasets",
"name": "replicasets/scale",
"name": "replicasets/status",
"name": "statefulsets",
"name": "statefulsets/scale",
"name": "statefulsets/status",
# 问题：job类型的资源在哪里查看 batch/extension?
# 查看deployment名称和selflink
$ curl -s 10.0.0.120:8080/apis/apps/v1/deployments | jq .items | grep -E "(\bname\b|\bnamespace\b|selfLink)"
"name": "test-go-web",
"namespace": "default",
"selfLink": "/apis/apps/v1/namespaces/default/deployments/test-go-web",
# 查看某个deployment详情
$ kubectl get deployments -o wide
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
test-go-web 5 5 5 5 1h test-go-web xxbandy123/go-web run=test-go-web
$ curl -s 10.0.0.120:8080/apis/apps/v1/namespaces/default/deployments/test-go-web | jq .spec
{
"replicas": 5,
"selector": {
"matchLabels": {
"run": "test-go-web"
}
},
"template": {
"metadata": {
"creationTimestamp": null,
"labels": {
"run": "test-go-web"
}
},
"spec": {
"containers": [
{
"name": "test-go-web",
"image": "xxbandy123/go-web",
"ports": [
{
"containerPort": 9090,
"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": 1,
"maxSurge": 1
}
},
"revisionHistoryLimit": 10,
"progressDeadlineSeconds": 600
}
# 查看service资源下的实例
# curl -s 10.0.0.120:8080/api/v1/services/ | jq ".items" | jq values[1] |grep -E "(\bname\b|selfLink|\bnamespace\b)"
"name": "test-go-web",
"namespace": "default",
"selfLink": "/api/v1/namespaces/default/services/test-go-web",
# 查看某个service详情 【具体的资源类型会被划分到namespaces下】
$ curl -s 10.0.0.120:8080/api/v1/namespaces/default/services/test-go-web | jq -r '.spec'
{
"ports": [
{
"protocol": "TCP",
"port": 9090,
"targetPort": 9090,
"nodePort": 30315
}
],
"selector": {
"run": "test-go-web"
},
"clusterIP": "10.254.141.49",
"type": "NodePort",
"sessionAffinity": "None",
"externalTrafficPolicy": "Cluster"
}
# 查看configmap
$ curl -s 10.0.0.120:8080/api/v1/configmaps | jq .items
# 查看secrets
$ curl -s 10.0.0.120:8080/api/v1/secrets | jq .items | grep "\"\bname\b"
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