Jaeger Kubernetes Templates
How to contribute
Please see CONTRIBUTING.md
This template uses an in-memory storage with a limited functionality for local testing and development. The image used defaults to the latest version (released)[https://github.com/jaegertracing/jaeger/releases]. Do not use this template in production environments. Note that functionality may differ from the pinned docker versions for production.
Install everything in the current namespace:
kubectl create -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/all-in-one/jaeger-all-in-one-template.yml
Once everything is ready,
kubectl get service jaeger-query tells you where to find Jaeger URL.
If you are using
minikube to setup your Kubernetes cluster, the command
minikube service jaeger-query --url
can be used instead.
Pinned Production Version
The docker image tags are manually pinned and manually updated. You should use the current pinned version for production.
The Jaeger Collector and Query require a backing storage to exist before being started up. As a starting point for your own templates, we provide basic templates deploying Cassandra and Elasticsearch. None of them are ready for production and should be adapted before any real usage.
To use our Cassandra template:
kubectl create -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/production/configmap.yml kubectl create -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/production/cassandra.yml
For Elasticsearch, use:
kubectl create -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/production-elasticsearch/configmap.yml kubectl create -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/production-elasticsearch/elasticsearch.yml
The Cassandra template includes also a Kubernetes
Job that creates the schema required by the Jaeger components. It's advisable
to wait for this job to finish before deploying the Jaeger components. To check the status of the job, run:
kubectl get job jaeger-cassandra-schema-job
The job should have
1 in the
The Jaeger Collector, Query and Agent require a
ConfigMap to exist on the same namespace, named
ConfigMap is included in the storage templates, as each backing storage have their own specific configuration entries,
but in your environment, you'll probably manage it differently.
If changes are required for the configuration, the
edit command can be used:
kubectl edit configmap jaeger-configuration
The main production template deploys the Collector and the Query Service (with UI) as separate individually scalable services,
as well as the Agent as
kubectl create -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/jaeger-production-template.yml
If the backing storage is not ready by the time the Collector/Agent start, they will fail and Kubernetes will reschedule the pod. It's advisable to either wait for the backing storage to stabilize, or to ignore such failures for the first few minutes.
Once everything is ready,
kubectl get service jaeger-query tells you where to find Jaeger URL, or
minikube service jaeger-query --url when using
As the agent is deployed as a
DaemonSet, the node's IP address can be stored as an environment variable and passed down
to the application as:
env: - name: JAEGER_AGENT_HOST valueFrom: fieldRef: fieldPath: status.hostIP
Deploying the agent as sidecar
The Jaeger Agent is designed to be deployed local to your service, so that it can receive traces via UDP keeping your
application's load minimal. By default, the template above installs the agent as a
DaemonSet, but this means that all
pods running on a given node will send data to the same agent. If that's not suitable for your workload, an alternative
is to deploy the agent as a sidecar. To accomplish that, just add it as a container within any struct that supports
spec.containers, like a
Deployment and so on. More about this be found on the blog post
Deployment strategies for the Jaeger Agent.
Assuming that your application is named
myapp and the image is for it is
Deployment descriptor would be something like:
- apiVersion: apps/v1 kind: Deployment metadata: name: myapp spec: selector: matchLabels: app: myapp template: metadata: labels: app: myapp spec: containers: - image: mynamespace/hello-myimage name: myapp ports: - containerPort: 8080 - image: jaegertracing/jaeger-agent name: jaeger-agent ports: - containerPort: 5775 protocol: UDP - containerPort: 6831 protocol: UDP - containerPort: 6832 protocol: UDP - containerPort: 5778 protocol: TCP args: ["--collector.host-port=jaeger-collector.jaeger-infra.svc:14267"]
The Jaeger Agent will then be available to your application at
In most cases, you don't need to specify a hostname or port to your Jaeger Tracer, as it will default to the right
Configure UDP/HTTP Senders
As the Jaeger Agent is deployed with the other components, your application needs to tell the Jaeger Client where to find the agent. Refer to your client's documentation for the appropriate mechanism, but most clients allow this to be set via the environment variable
JAEGER_AGENT_HOST in environment variable like so:
env: - name: JAEGER_SERVICE_NAME value: <YOUR SERVICE NAME> - name: JAEGER_AGENT_HOST value: jaeger-all-in-one-agent - name: JAEGER_SAMPLER_TYPE value: const - name: JAEGER_SAMPLER_PARAM value: "1"
The following service names are supported by HTTP sender:
The following service names are supported by UDP sender:
Even though this template uses a stateful Cassandra, backing storage is set to
emptyDir. It's more
appropriate to create a
PersistentVolume and use it instead. Note that this
Cassandra deployment does not support deleting pods or scaling down, as this might require
administrative tasks that are dependent on the final deployment architecture.
Jaeger production deployment needs an external process to derive dependency links between services. Project spark-dependencies provides this functionality.
This job should be periodically run before end of a day. The following command creates
scheduled 5 minutes before the midnight.
kubectl run jaeger-spark-dependencies --schedule="55 23 * * *" --env="STORAGE=cassandra" --env="CASSANDRA_CONTACT_POINTS=cassandra:9042" --restart=Never --image=jaegertracing/spark-dependencies
If you want to run the job only once and immediately then remove scheduled flag.
Deploying Docker Tags
The Jaeger project automatically creates new Docker images with tags that mirror the release number. The production manifests uses pinned versions as to not accidentally break people on new releases.
A general tip for deploying docker images (i.e. on kubernetes): it's recommended that you do not use the tag
:latestin production but rather pin the latest version. See the kubernetes best practices for more details.
A curated Chart for Kubernetes Helm that adds all components required to run Jaeger.
If you need to remove the Jaeger components created by this template, run:
kubectl delete all,daemonset,configmap -l jaeger-infra
Tests are based on Arquillian Cube which require an active connection to
kubernetes cluster (via
kubectl). When executing tests from IDE make sure that template is copied to
minikube start ./mvnw clean verify -Pcassandra,elasticsearch,all-in-one