What is the correct IP Address of Kubernetes Node coming from the payload?

mango_byte — Mon, 06 May 2024 13:38:51 GMT

Hi,

I am trying to fetch KUBERNETES_NODE from Dynatrace v2 API, and I am getting the below payload, I want to use the IP Address value for the Node, but as you can see inside properties there is an array of internalIPAddresses which I am not confident to use as it is an array, so can contain more values in future, can you tell me which JSON key is correct here to fetch the value.

{

"totalCount": 1,

"pageSize": 50,

"entities": [

{

"entityId": "KUBERNETES_NODE-6C3263148CCF0B35",

"type": "KUBERNETES_NODE",

"displayName": "ip-10-2-0-116.us-east-2.compute.internal",

"properties": {

"kubernetesNodeConditions": {

"Ready": "NODE_CONDITION_TRUE",

"MemoryPressure": "NODE_CONDITION_FALSE",

"DiskPressure": "NODE_CONDITION_FALSE",

"PIDPressure": "NODE_CONDITION_FALSE"

"detectedName": "ip-10-2-0-116.us-east-2.compute.internal",

"internalIpAddresses": [

"10.2.0.116"

"kubernetesProviderType": "PROVIDER_TYPE_UNKNOWN",

"kubeletVersion": "v1.28.6+k3s2",

"kubernetesLabels": {

"kubernetes.io/hostname": "ip-10-2-0-116.us-east-2.compute.internal",

"kubernetes.io/arch": "amd64",

"kubernetes.io/os": "linux",

"beta.kubernetes.io/arch": "amd64",

"beta.kubernetes.io/instance-type": "k3s",

"beta.kubernetes.io/os": "linux",

"node-role.kubernetes.io/master": "true",

"node-role.kubernetes.io/control-plane": "true",

"node.kubernetes.io/instance-type": "k3s"

"kubernetesNodeUid": "61174194-cbad-4e74-bfed-10d54f21280f",

"ipAddress": [],

"osArchitecture": "X86",

"kubernetesNodeRoles": [

"control-plane",

"master"

"resourceCreationTimestamp": 1709231820000,

"osInfo": "Red Hat Enterprise Linux 8.9 (Ootpa)",

"kubernetesNodeStates": [

"NODE_STATE_READY"

"osVersion": "4.18.0-513.24.1.el8_9.x86_64",

"osType": "LINUX",

"kubernetesNodeCordoned": false,

"kubernetesConditions": [

{

"type": "MemoryPressure",

"status": "False",

"reason": "KubeletHasSufficientMemory",

"message": "kubelet has sufficient memory available",

"lastTransitionTimestamp": 1709231820000

{

"type": "DiskPressure",

"status": "False",

"reason": "KubeletHasNoDiskPressure",

"message": "kubelet has no disk pressure",

"lastTransitionTimestamp": 1709231820000

{

"type": "PIDPressure",

"status": "False",

"reason": "KubeletHasSufficientPID",

"message": "kubelet has sufficient PID available",

"lastTransitionTimestamp": 1709231820000

{

"type": "Ready",

"status": "True",

"reason": "KubeletReady",

"message": "kubelet is posting ready status",

"lastTransitionTimestamp": 1713564532000

}

"kubernetesAnnotations": {

"flannel.alpha.coreos.com/kube-subnet-manager": "true",

"flannel.alpha.coreos.com/public-ip": "10.2.0.116",

"flannel.alpha.coreos.com/backend-data": "{\"VNI\":1,\"VtepMAC\":\"4a:d8:f9:b1:13:b5\"}",

"k3s.io/node-env": "{\"K3S_DATA_DIR\":\"/var/lib/rancher/k3s/data/13f9723ffde84ba41d08658d407a523bcf32698f179c9ab30cc0534e1e5d2c1a\"}",

"alpha.kubernetes.io/provided-node-ip": "10.2.0.116",

"csi.volume.kubernetes.io/nodeid": "{\"csi.oneagent.dynatrace.com\":\"ip-10-2-0-116.us-east-2.compute.internal\"}",

"k3s.io/internal-ip": "10.2.0.116",

"k3s.io/node-config-hash": "BJHH2XQGHLYI42QVGO2SCCACG6GVKD3ZJOPRCC2BAMYZKNGH5ZRA====",

"k3s.io/node-args": "[\"server\",\"--write-kubeconfig-mode\",\"644\"]",

"node.alpha.kubernetes.io/ttl": "0",

"volumes.kubernetes.io/controller-managed-attach-detach": "true",

"k3s.io/hostname": "ip-10-2-0-116.us-east-2.compute.internal",

"flannel.alpha.coreos.com/backend-type": "vxlan"

"kubernetesNodeSystemUuid": "ec2d527e-261a-3d17-96d6-5c792a6d9a61"

"tags": [],

"managementZones": [],

"fromRelationships": {},

"toRelationships": {

"isClusterOfNode": [

{

"id": "KUBERNETES_CLUSTER-DFDB0908FE53A2C5",

"type": "KUBERNETES_CLUSTER"

}

"runsOn": [

{

"id": "CLOUD_APPLICATION_INSTANCE-2C3937ABC0B41D2A",