├── .github └── workflows │ └── main.yaml ├── LICENSE ├── README.md ├── create-minikube-cluster-for-mac.sh ├── create-minikube-cluster.sh ├── deploy-es.sh ├── deploy-fluent-operator.sh ├── deploy-kafka.sh ├── deploy-loki.sh └── manifest ├── route-to-different-kafka-topic.yaml └── use-buffer-for-fluentd.yaml /.github/workflows/main.yaml: -------------------------------------------------------------------------------- 1 | name: 'main ci' 2 | 3 | on: 4 | push: 5 | branches: 6 | - master 7 | pull_request: 8 | branches: 9 | - master 10 | 11 | jobs: 12 | es: 13 | name: Test Elasticsearch Installation 14 | runs-on: ubuntu-18.04 15 | steps: 16 | - name: Install Helm 17 | uses: azure/setup-helm@v1 18 | with: 19 | version: v3.6.3 20 | 21 | - name: Checkout 22 | uses: actions/checkout@v2 23 | with: 24 | fetch-depth: 0 25 | 26 | - name: Create Cluster 27 | run: | 28 | chmod +x ./create-minikube-cluster.sh && ./create-minikube-cluster.sh 29 | 30 | - name: Test ES Installation 31 | run: | 32 | chmod +x ./deploy-es.sh && bash ./deploy-es.sh 33 | 34 | kafka: 35 | name: Test Kafka Installation 36 | runs-on: ubuntu-18.04 37 | steps: 38 | - name: Install Helm 39 | uses: azure/setup-helm@v1 40 | with: 41 | version: v3.6.3 42 | 43 | - name: Checkout 44 | uses: actions/checkout@v2 45 | with: 46 | fetch-depth: 0 47 | 48 | - name: Create Cluster 49 | run: | 50 | chmod +x ./create-minikube-cluster.sh && ./create-minikube-cluster.sh 51 | 52 | - name: Test KAFKA Installation 53 | run: | 54 | chmod +x ./deploy-kafka.sh && bash ./deploy-kafka.sh 55 | 56 | fluent-operator: 57 | name: Test Fluent Operator installation 58 | runs-on: ubuntu-18.04 59 | steps: 60 | - name: Checkout 61 | uses: actions/checkout@v2 62 | with: 63 | fetch-depth: 0 64 | 65 | - name: Create Cluster 66 | run: | 67 | chmod +x ./create-minikube-cluster.sh && ./create-minikube-cluster.sh 68 | 69 | - name: Test Fluent Operator 70 | run: | 71 | chmod +x ./deploy-fluent-operator.sh && bash ./deploy-fluent-operator.sh -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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brew unlink minikube
54 | >
brew link minikube
55 | > Reference: https://minikube.sigs.k8s.io/docs/start/ 56 | 57 | For some other examples of deploying data sinks (e.g. Loki, etc.) then have a look at https://github.com/calyptia/fluent-bit-devtools. 58 | 59 | ## Install Fluent Operator 60 | 61 | Fluent Operator controls the lifecycle of the Fluent Bit and Fluentd deployments. 62 | You can use the following script to launch the Fluent Operator in the `fluent` namespace: 63 | 64 | ```shell 65 | ./deploy-fluent-operator.sh 66 | ``` 67 | 68 | You can find more details of the Fluent Bit and Fluentd Custom Resource Definitions (CRDs) in the links below: 69 | 70 | - https://github.com/fluent/fluent-operator#fluent-bit 71 | - https://github.com/fluent/fluent-operator#fluentd 72 | 73 | ## Deploy Fluent Bit and Fluentd 74 | 75 | The configuration of Fluent Bit and Fluentd are defined as CRDs with the Fluent Operator: you can create a Fluent Bit DaemonSet or a Fluentd StatefulSet by declaring a FluentBit or Fluentd Custom Resource (CR). 76 | 77 | ### Deploy Fluent Bit 78 | 79 | The `FluentBit` CR works together with `ClusterFluentBitConfig` and they should be created together. 80 | The following `FluentBit` CR is just an example. 81 | To deploy the actual Fluent Bit DaemonSet, please refer to the [Using Fluent Bit to collect kubelet logs and output to Elasticsearch](#using-fluent-bit-to-collect-kubelet-logs-and-output-to-elasticsearch) and [Using Fluent Bit to collect K8s application logs and output to Kafka, Elasticsearch and Loki](#using-fluent-bit-to-collect-k8s-application-logs-and-output-to-kafka-elasticsearch-and-loki) sections. 82 | 83 | ```yaml 84 | apiVersion: fluentbit.fluent.io/v1alpha2 85 | kind: FluentBit 86 | metadata: 87 | name: fluent-bit 88 | namespace: fluent 89 | labels: 90 | app.kubernetes.io/name: fluent-bit 91 | spec: 92 | image: kubesphere/fluent-bit:v1.8.11 93 | positionDB: 94 | hostPath: 95 | path: /var/lib/fluent-bit/ 96 | resources: 97 | requests: 98 | cpu: 10m 99 | memory: 25Mi 100 | limits: 101 | cpu: 500m 102 | memory: 200Mi 103 | fluentBitConfigName: fluent-bit-only-config 104 | tolerations: 105 | - operator: Exists 106 | ``` 107 | 108 | ### Deploy Fluentd 109 | 110 | ```shell 111 | cat < To double check the output, please refer to [this guide](#how-to-check-the-configuration-and-data). 277 | 278 | ### Using Fluent Bit to collect K8s application logs and output to Kafka, Elasticsearch and Loki 279 | 280 | This covers the various data sinks in this example, they do not all have to be enabled but you will get errors on trying to send to a sink that is not available. 281 | 282 | ```shell 283 | cat < To double check the output, please refer to [this guide](#how-to-check-the-configuration-and-data). 449 | 450 | ## Fluent Bit + Fluentd mode 451 | 452 | With its rich plugins, Fluentd acts as a log aggregation layer and is able to perform more advanced log processing. 453 | You can forward logs from Fluent Bit to Fluentd with ease using the Fluent Operator. 454 | 455 | ### Forward logs from Fluent Bit to Fluentd 456 | 457 | To forward logs from Fluent Bit to Fluentd, we need to enable the Fluent Bit forward plugin as below: 458 | 459 | ```shell 460 | cat < 945 | @type forward 946 | bind 0.0.0.0 947 | port 24224 948 | 949 | 950 | @id main 951 | @type label_router 952 | 953 | @label @48b7cb809bc2361ba336802a95eca0d4 954 | 955 | namespaces kube-system,default 956 | 957 | 958 | 959 | 987 | ``` 988 | 989 | 4. If you chose to forward the logs to Elasticsearch in the previous steps, you could query the elastic cluster kubernetes_ns buckets: 990 | 991 | ```bash 992 | kubectl -n elastic exec -it elasticsearch-master-0 -c elasticsearch -- curl -X GET "localhost:9200/fluent-log*/_search?pretty" -H 'Content-Type: application/json' -d '{ 993 | "size" : 0, 994 | "aggs" : { 995 | "kubernetes_ns": { 996 | "terms" : { 997 | "field": "kubernetes.namespace_name.keyword" 998 | } 999 | } 1000 | } 1001 | }' 1002 | ``` 1003 | 1004 | > If you don't use fluentd to extract the namspace field, you can use other query API. 1005 | 1006 | 5. You could also query the index of Elasticsearch. You will find that a new index has been created by fluent operator. 1007 | 1008 | ```bash 1009 | kubectl -n elastic exec -it elasticsearch-master-0 -c elasticsearch -- curl 'localhost:9200/_cat/indices?v' 1010 | ``` 1011 | 1012 | 6. If you chose to forward the logs to Kafka in the previous steps, you could query the kafka cluster and its topic: 1013 | 1014 | ```bash 1015 | # Enter a util pod to connect to kafka 1016 | kubectl run --rm utils -it --image arunvelsriram/utils bash 1017 | # Connect to kafka and read data from a kafka topic 1018 | kafkacat -C -b my-cluster-kafka-brokers.kafka.svc:9092 -t 1019 | # exit the util pod 1020 | exit 1021 | ``` 1022 | 1023 | > Replace to the actual topic. 1024 | -------------------------------------------------------------------------------- /create-minikube-cluster-for-mac.sh: -------------------------------------------------------------------------------- 1 | brew install minikube 2 | 3 | brew install kubectl 4 | 5 | minikube start --force --driver=hyperkit 6 | kubectl config use-context minikube 7 | 8 | -------------------------------------------------------------------------------- /create-minikube-cluster.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -eu 3 | 4 | curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 5 | sudo install minikube-linux-amd64 /usr/local/bin/minikube 6 | 7 | curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" 8 | chmod +x kubectl 9 | sudo mv kubectl /usr/local/bin/ 10 | 11 | minikube start --force --driver=docker 12 | kubectl config use-context minikube 13 | 14 | echo "Cluster created successfully" 15 | -------------------------------------------------------------------------------- /deploy-es.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -eu 3 | # Simple script to deploy Elastic to a Kubernetes cluster with context already set 4 | 5 | ES_NAMESPACE=${ES_NAMESPACE:-elastic} 6 | 7 | if [[ "${INSTALL_HELM:-no}" == "yes" ]]; then 8 | # See https://helm.sh/docs/intro/install/ 9 | curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash 10 | fi 11 | 12 | helm repo add elasticsearch https://helm.elastic.co || helm repo add elasticsearch https://helm.elastic.co/ 13 | helm repo update 14 | 15 | helm upgrade --install --namespace="$ES_NAMESPACE" --create-namespace --wait elasticsearch elasticsearch/elasticsearch \ 16 | --set replicas=1,minMasterNodes=1 17 | 18 | # Kibana is provided primarily for visualisation 19 | helm upgrade --install --namespace="$ES_NAMESPACE" --create-namespace --wait kibana elasticsearch/kibana 20 | 21 | echo "Kibana deployed, now set up indexes by going to http://localhost:5601/app/management/kibana/indexPatterns after running:" 22 | echo "kubectl port-forward -n elastic svc/kibana-kibana 5601" 23 | -------------------------------------------------------------------------------- /deploy-fluent-operator.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -eu 3 | # Simple script to deploy Fluent Operator to a Kubernetes cluster with context already set 4 | 5 | LOGGING_NAMESPACE=${LOGGING_NAMESPACE:-fluent} 6 | 7 | if [[ "${INSTALL_HELM:-no}" == "yes" ]]; then 8 | # See https://helm.sh/docs/intro/install/ 9 | curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash 10 | fi 11 | 12 | helm upgrade --install fluent-operator --create-namespace -n "$LOGGING_NAMESPACE" --wait --timeout 10m https://github.com/fluent/fluent-operator/releases/download/v2.8.0/fluent-operator-2.8.0.tgz 13 | 14 | echo -e "\n" 15 | kubectl -n "$LOGGING_NAMESPACE" wait --for=condition=available deployment/fluent-operator --timeout=10m 16 | echo "Please visit https://github.com/fluent/fluent-operator/tree/master/manifests/fluentd to apply the manifests that you want to explore." 17 | -------------------------------------------------------------------------------- /deploy-kafka.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | set -eu 3 | # Simple script to deploy Kafka to a Kubernetes cluster with context already set 4 | KAFKA_NAMESPACE=${KAFKA_NAMESPACE:-kafka} 5 | CLUSTER_NAME=${CLUSTER_NAME:-fluent} 6 | 7 | if [[ "${INSTALL_HELM:-no}" == "yes" ]]; then 8 | # See https://helm.sh/docs/intro/install/ 9 | curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash 10 | fi 11 | 12 | # docker pull quay.io/strimzi/kafka:0.28.0-kafka-3.1.0 13 | # docker pull quay.io/strimzi/operator:0.28.0 14 | # kind load docker-image quay.io/strimzi/kafka:0.28.0-kafka-3.1.0 --name fluent 15 | # kind load docker-image quay.io/strimzi/operator:0.28.0 --name fluent 16 | 17 | kubectl create ns $KAFKA_NAMESPACE 18 | kubectl create -f 'https://strimzi.io/install/latest?namespace=kafka' -n $KAFKA_NAMESPACE 19 | #kubectl apply -f https://strimzi.io/examples/latest/kafka/kafka-persistent-single.yaml -n $KAFKA_NAMESPACE 20 | cat <