Logging

eksctl create iamserviceaccount \ --name fluentd \ --region=ap-northeast-2 \ --cluster gwangju-eks-cluster \ --namespace=fluentd \ --attach-policy-arn arn:aws:iam::aws:policy/CloudWatchFullAccess \ --override-existing-serviceaccounts \ --approve

kubectl create configmap cluster-info \ --from-literal=cluster.name=gwangju-eks-cluster \ --from-literal=logs.region=ap-northeast-2 -n fluentd

apiVersion: v1 kind: Namespace metadata: name: fluentd labels: name: amazon-cloudwatch

kubectl apply -f ns.yaml

apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: fluentd-role rules: - apiGroups: [""] resources: - namespaces - pods - pods/logs verbs: ["get", "list", "watch"] --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: fluentd-role-binding roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: fluentd-role subjects: - kind: ServiceAccount name: fluentd namespace: fluentd --- apiVersion: v1 kind: ConfigMap metadata: name: fluentd-config namespace: fluentd labels: k8s-app: fluentd-cloudwatch data: kubernetes.conf: | kubernetes.conf fluent.conf: | @include servic-a.conf @include servic-b.conf @include service-c.conf <match fluent.**> @type null </match> servic-a.conf: | <source> @type forward bind 0.0.0.0 port 24224 tag cloudwatch_logs.fluent-bit-a.access </source> <match cloudwatch_logs.fluent-bit-a.*> @type cloudwatch_logs log_group_name /gwangju/eks/application/logs log_stream_name service-a-logs auto_create_stream true <buffer tag> flush_mode immediate </buffer> </match> servic-b.conf: | <source> @type forward bind 0.0.0.0 port 24225 tag cloudwatch_logs.fluent-bit-b.access </source> <match cloudwatch_logs.fluent-bit-b.*> @type cloudwatch_logs log_group_name /gwangju/eks/application/logs log_stream_name service-b-logs auto_create_stream true <buffer tag> flush_mode immediate </buffer> </match> service-c.conf: | <source> @type forward bind 0.0.0.0 port 24226 tag cloudwatch_logs.fluent-bit-c.access </source> <match cloudwatch_logs.fluent-bit-c.*> @type cloudwatch_logs log_group_name /gwangju/eks/application/logs log_stream_name service-c-logs auto_create_stream true <buffer tag> flush_mode immediate </buffer> </match> --- apiVersion: apps/v1 kind: DaemonSet metadata: name: fluentd namespace: fluentd spec: selector: matchLabels: k8s-app: fluentd-cloudwatch template: metadata: labels: k8s-app: fluentd-cloudwatch annotations: configHash: 8915de4cf9c3551a8dc74c0137a3e83569d28c71044b0359c2578d2e0461825 spec: serviceAccountName: fluentd terminationGracePeriodSeconds: 30 # Because the image's entrypoint requires to write on /fluentd/etc but we mount configmap there which is read-only, # this initContainers workaround or other is needed. # See https://github.com/fluent/fluentd-kubernetes-daemonset/issues/90 initContainers: - name: copy-fluentd-config image: busybox command: ['sh', '-c', 'cp /config-volume/..data/* /fluentd/etc'] volumeMounts: - name: config-volume mountPath: /config-volume - name: fluentdconf mountPath: /fluentd/etc - name: update-log-driver image: busybox command: ['sh','-c',''] containers: - name: fluentd-cloudwatch image: fluent/fluentd-kubernetes-daemonset:v1.10.3-debian-cloudwatch-1.0 env: - name: AWS_REGION valueFrom: configMapKeyRef: name: cluster-info key: logs.region - name: CLUSTER_NAME valueFrom: configMapKeyRef: name: cluster-info key: cluster.name - name: CI_VERSION value: "k8s/1.3.24" - name: FLUENT_CONTAINER_TAIL_PARSER_TYPE value: /^(?<time>.+) (?<stream>stdout|stderr) (?<logtag>[FP]) (?<log>.*)$/ resources: limits: memory: 400Mi requests: cpu: 100m memory: 200Mi volumeMounts: - name: config-volume mountPath: /config-volume - name: fluentdconf mountPath: /fluentd/etc - name: fluentd-config mountPath: /fluentd/etc/kubernetes.conf subPath: kubernetes.conf - name: varlog mountPath: /var/log - name: varlibdockercontainers mountPath: /var/lib/docker/containers readOnly: true - name: runlogjournal mountPath: /run/log/journal readOnly: true - name: dmesg mountPath: /var/log/dmesg readOnly: true volumes: - name: config-volume configMap: name: fluentd-config - name: fluentdconf emptyDir: {} - name: fluentd-config configMap: name: fluentd-config items: - key: kubernetes.conf path: kubernetes.conf - name: varlog hostPath: path: /var/log - name: varlibdockercontainers hostPath: path: /var/lib/docker/containers - name: runlogjournal hostPath: path: /run/log/journal - name: dmesg hostPath: path: /var/log/dmesg

kubectl apply -f fleuntd.yaml

apiVersion: v1 kind: Service metadata: name: fluentd-svc namespace: fluentd spec: selector: k8s-app: fluentd-cloudwatch type: ClusterIP ports: - name : service-a protocol: TCP port: 24224 targetPort: 24224 - name: service-b protocol: TCP port: 24225 targetPort: 24225 - name: service-c protocol: TCP port: 24226 targetPort: 24226

kubectl apply -f service.yaml

apiVersion: v1 kind: ConfigMap metadata: name: fluent-bit-sidecar-a-config namespace: app data: fluent-bit.conf: | [SERVICE] Flush 1 Log_Level info Daemon off [INPUT] Name tail Path /log/*.log Tag service-a Refresh_Interval 10 Mem_Buf_Limit 50MB Skip_Long_Lines On [OUTPUT] Name forward Match * Host SVC_IP Port 24224 Retry_Limit False

sed -i "s|SVC_IP|$SVC_CLUSTER_IP|g" service-a-cm.yaml

kubectl apply -f service-a-cm.yaml

apiVersion: v1 kind: ConfigMap metadata: name: fluent-bit-sidecar-b-config namespace: app data: fluent-bit.conf: | [SERVICE] Flush 1 Log_Level info Daemon off [INPUT] Name tail Path /log/*.log Tag service-b Refresh_Interval 10 Mem_Buf_Limit 50MB Skip_Long_Lines On [OUTPUT] Name forward Match * Host SVC_IP Port 24225 Retry_Limit False

sed -i "s|SVC_IP|$SVC_CLUSTER_IP|g" service-b-cm.yaml

kubectl apply -f service-b-cm.yaml

apiVersion: v1 kind: ConfigMap metadata: name: fluent-bit-sidecar-c-config namespace: app data: fluent-bit.conf: | [SERVICE] Flush 1 Log_Level info Daemon off [INPUT] Name tail Path /log/*.log Tag service-c Refresh_Interval 10 Mem_Buf_Limit 50MB Skip_Long_Lines On [OUTPUT] Name forward Match * Host SVC_IP Port 24226 Retry_Limit False

sed -i "s|SVC_IP|$SVC_CLUSTER_IP|g" service-c-cm.yaml

kubectl apply -f service-c-cm.yaml