As we all know while
setting up the infrastructure there a lot of tasks involved - configuration,
managing the data and files, searching the logs, troubleshooting ,debugging
etc.If you have a large and complex infrastructure you have to ensure that your
data gets stored properly. This ensures better data filter and analysis which
helps in easy troubleshooting and make your infra environment stable.
Let us now talk about
Kubernetes. Generally when its comes to Kubernetes we talk about testing,
monitoring and configuration management. Let's look at how to collect data
about Kunernetes for data/log analysis.
FileBeat version
6.0.0 or later has added processor add_kubernetes_metadata which allows to
gather the k8s container logs and send it to Elasticsearch.
PROCESS
add_kubernetes_metadata enriches logs with metadata from the source
container, it adds pod name, container name, and image, Kubernetes labels and,
optionally, annotations. It works by watching Kubernetes API for pod events to
build a local cache of running containers. When a new log line is read, it gets
enriched with metadata from the local cache
Configuration with Elasticsearch & Kibana
It’s great if
you have the ElasticSearch & Kibana inplace, if not then not to worry, just
follow the below link to setup it.
Note: make sure you
have configured ElasticSearch Basic auth for elastic, kibana,logstash users
Now connect to the
K8s workstation(kubectl) and download the manifest from : https://raw.githubusercontent.com/elastic/beats/6.0/deploy/kubernetes/filebeat-kubernetes.yaml
Change the auth
details in manifest
# Update
Elasticsearch connection details
- name:
ELASTICSEARCH_HOST
value: elasticsearch
- name:
ELASTICSEARCH_PORT
value: “9200”
- name:
ELASTICSEARCH_USERNAME
value: elastic
- name:
ELASTICSEARCH_PASSWORD
value: your elastic use password
Now deploy the
daemonset using updates manifest.
kubectl create -f
filebeat-kubernetes.yaml
Now got to the Kibana
Dashboard & configure the index with filebeat-* pattern and within a minute
you should see the Kubernetes containers logs.
Cheers!
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