This demo is using :
- a modified version of the project Qlkube
- the openTelemetry demo
- the OpenTelemetry Operator
- Dynatrace
You will first need a Kubernetes cluster with 2 Nodes. You can either deploy on Minikube or K3s or follow the instructions to create GKE cluster:
PROJECT_ID="<your-project-id>"
gcloud services enable container.googleapis.com --project ${PROJECT_ID}
gcloud services enable monitoring.googleapis.com \
cloudtrace.googleapis.com \
clouddebugger.googleapis.com \
cloudprofiler.googleapis.com \
--project ${PROJECT_ID}ZONE=europe-west3-a
NAME=otelinpractice-qlkube
gcloud container clusters create "${NAME}" \
--zone ${ZONE} --machine-type=e2-standard-2 --num-nodes=3If you don't have any Dyntrace tenant , then i suggest to create a trial using the following link : Dynatrace Trial
Once you have your Tenant save the Dynatrace (including https) tenant URL in the variable DT_TENANT_URL (for example : https://dedededfrf.live.dynatrace.com)
DT_TENANT_URL=<YOUR TENANT URL>
Create a Dynatrace token with the following scope ( left menu Acces Token):
- ingest metrics
- ingest OpenTelemetry traces
DATA_INGEST_TOKEN=<YOUR TOKEN VALUE>
git clone https://github.com/henrikrexed/qlkube
cd qlkubeThe application will deploy the otel demo v1.2.1
chmod 777 deployment.sh
./deployment.sh --clustername "${NAME}" --dturl "${DT_TENANT_URL}" --dttoken "${DATA_INGEST_TOKEN}"qlkube is a graphql api for kubernetes, allowing you to interact with all the features of the Kubernetes api using graphql.
qlkube's graphql schema is dynamically built from the openapi/swagger api specification exposed by the Kubernetes cluster it is running in - qlkube should therefore:
- expose all the types and operations from the Kubernetes rest api in its grapqhl api
- be consistent with the exact Kubernetes api version of your cluster and kept up to date if and when this changes
In addition to the directly mapped operations from the openapi spec, qlkube provides an 'all' query type that gives a more natural 'kubectl' influenced interface into the api.
qlkube ships with the Apollo GraphQL Playground, so you can play around with the api straight away.
The 'all' resource is the easiest query type to use for querying kubernetes resources of all types (services, pods, deployments etc). qlkube also exposes all the low-level resources autogenerated from the Kubernetes openapi/swagger api - these types are named exactly as the 'operationId' in the openapi spec, they can therefore seem quite 'low-level' and sometimes unintuitive in comparison.
Get all pods in all namespaces
This query returns the names and namespaces of all the pods in the cluster.
(here we use the more friendly 'all' type - you can perform a similar query using listCoreV1PodForAllNamespaces)
query getAllPodsInAllNamespaces {
all {
pods {
items {
metadata {
name
namespace
}
}
}
}
}Output:
{
"data": {
"all": {
"pods": {
"items": [
{
"metadata": {
"name": "alpha-7c766f4fc7-2bh8m",
"namespace": "default"
}
},
{
"metadata": {
"name": "alpha-7c766f4fc7-hx8ml",
"namespace": "default"
}
},
{
"metadata": {
"name": "alpha-7c766f4fc7-ztpph",
"namespace": "default"
}
},
{
"metadata": {
"name": "beta-v1-597679f796-k5gn4",
"namespace": "default"
}
},
{
"metadata": {
"name": "beta-v1-597679f796-x7hsl",
"namespace": "default"
}
},
{
"metadata": {
"name": "gamma-79bc488b5b-srmxm",
"namespace": "default"
}
},
...etcGet all pods in a specific namespace
This query returns the names, namespaces, creation times and labels of all the pods in the 'default' namespace
(here we use the more friendly 'all' type - you can perform a similar query using ioK8sApiCoreV1PodList)
query getAllPodsInDefaultNamespace {
all(namespace: "default") {
pods {
items {
metadata {
name
namespace
creationTimestamp
labels
}
}
}
}
}Output:
{
"data": {
"all": {
"pods": {
"items": [
{
"metadata": {
"name": "alpha-7c766f4fc7-2bh8m",
"namespace": "default",
"creationTimestamp": "2019-06-03T15:07:17Z",
"labels": {
"app": "alpha",
"appKubernetesIoManagedBy": "skaffold-v0.29.0",
"appId": "github.expedia.biz_hotels_alpha",
"podTemplateHash": "7c766f4fc7",
"skaffoldDevBuilder": "local",
"skaffoldDevCleanup": "true",
"skaffoldDevDeployer": "kubectl",
"skaffoldDevDockerApiVersion": "1.39",
"skaffoldDevTagPolicy": "git-commit",
"skaffoldDevTail": "true",
"version": "v1"
}
}
},
...etc Get all kubernetes resources with a specific label
This query gets the names of all kubernetes resources (services, deployments, pods etc) that are labelled with label 'app=alpha'
(roughly equivalent to kubectl get all -l app=alpha)
query allResourcesOfApp {
all(labelSelector:"app=alpha") {
services {
items {
metadata {
name
}
}
}
deployments {
items {
metadata {
name
}
}
}
pods {
items {
metadata {
name
}
}
}
daemonSets {
items {
metadata {
name
}
}
}
replicaSets {
items {
metadata {
name
}
}
}
statefulSets {
items {
metadata {
name
}
}
}
jobs {
items {
metadata {
name
}
}
}
cronJobs {
items {
metadata {
name
}
}
}
namespaces {
items {
metadata {
name
}
}
}
}
}Output:
{
"data": {
"all": {
"services": {
"items": [
{
"metadata": {
"name": "alpha"
}
}
]
},
"deployments": {
"items": [
{
"metadata": {
"name": "alpha"
}
}
]
},
"pods": {
"items": [
{
"metadata": {
"name": "alpha-7c766f4fc7-2bh8m"
}
},
...etc Create namespace
This mutation creates a new 'bar' namespace. The input json is the escaped version of the following:
{
"apiVersion": "v1",
"kind": "Namespace",
"metadata": {
"name": "bar"
}
}We output the creation timestamp for the new namesapce.
mutation createNamespace {
createCoreV1Namespace(input: "{\"apiVersion\":\"v1\",\"kind\":\"Namespace\",\"metadata\":{\"name\":\"bar\"}}") {
metadata {
creationTimestamp
}
}
}Output:
{
"data": {
"createCoreV1Namespace": {
"metadata": {
"creationTimestamp": "2019-06-03T22:37:02Z"
}
}
}
}
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