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Elasticsearch yang sangat mudah diakses dan dapat diukur di Kubernetes

gambar
Dalam posting sebelumnya, kami meningkatkan set replika MongoDB dan memperkenalkan StatefulSet. Kami sekarang akan mengambil orkestrasi dari cluster ketersediaan tinggi Elasticsearch (dengan node master lainnya, node data, dan node klien) dan menggunakan ES-HQ dan Kibana.


Anda akan membutuhkan:


  1. Pemahaman dasar tentang Elasticsearch, jenis-jenis simpulnya, dan perannya.
  2. Cluster Kubernetes yang berfungsi dengan setidaknya tiga node (setidaknya empat core, 4 GB).
  3. Kemampuan untuk bekerja dengan Kibana.

Arsitektur Penerapan


gambar


  • Simpul data Elasticsearch digunakan sebagai StatefulSet dengan layanan tanpa kepala sehingga kami memiliki pengidentifikasi jaringan yang stabil .
  • Masternode Elasticsearch dikerahkan sebagai ReplicaSet dengan layanan tanpa kepala. Ini untuk penemuan otomatis .
  • Pod pada node klien Elasticsearch dikerahkan sebagai ReplicaSet dengan layanan internal sehingga Anda dapat mengirim permintaan baca / tulis ke node data.
  • Pod Kibana dan ElasticHQ digunakan sebagai ReplicaSet dengan layanan yang tersedia di luar cluster Kubernetes , tetapi terletak di dalam subnet (mereka tidak terbuka ke luar kecuali diperlukan).
  • HPA (Horizonal Pod Autoscaler) digunakan untuk node klien dan bertanggung jawab untuk penskalaan horizontal pada beban tinggi.
    "Ingat untuk mengonfigurasi lingkungan:
    1. Variabel ES_JAVA_OPTS .
    2. Variabel CLUSTER_NAME .
    3. Variabel NUMBER_OF_MASTERS untuk penyebaran master untuk menghindari situasi otak terpecah. Jika kita memiliki 3 tuan, sebutkan 2.
    4. Aturan anti-afinitas untuk perapian serupa untuk memastikan keandalan yang tinggi jika simpul kerja jatuh.
      "
      Mari kita gunakan layanan ini di kluster GKE.

kind: Namespace metadata: name: elasticsearch --- apiVersion: apps/v1beta1 kind: Deployment metadata: name: es-master namespace: elasticsearch labels: component: elasticsearch role: master spec: replicas: 3 template: metadata: labels: component: elasticsearch role: master spec: affinity: podAntiAffinity: preferredDuringSchedulingIgnoredDuringExecution: - weight: 100 podAffinityTerm: labelSelector: matchExpressions: - key: role operator: In values: - master topologyKey: kubernetes.io/hostname initContainers: - name: init-sysctl image: busybox:1.27.2 command: - sysctl - -w - vm.max_map_count=262144 securityContext: privileged: true containers: - name: es-master image: quay.io/pires/docker-elasticsearch-kubernetes:6.2.4 env: - name: NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: NODE_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: CLUSTER_NAME value: my-es - name: NUMBER_OF_MASTERS value: "2" - name: NODE_MASTER value: "true" - name: NODE_INGEST value: "false" - name: NODE_DATA value: "false" - name: HTTP_ENABLE value: "false" - name: ES_JAVA_OPTS value: -Xms256m -Xmx256m - name: PROCESSORS valueFrom: resourceFieldRef: resource: limits.cpu resources: limits: cpu: 2 ports: - containerPort: 9300 name: transport volumeMounts: - name: storage mountPath: /data volumes: - emptyDir: medium: "" name: "storage" --- apiVersion: v1 kind: Service metadata: name: elasticsearch-discovery namespace: elasticsearch labels: component: elasticsearch role: master spec: selector: component: elasticsearch role: master ports: - name: transport port: 9300 protocol: TCP clusterIP: None view rawes-master.yml hosted with love by GitHub

(Menyebarkan dan layanan tanpa kepala untuk node master)


 root$ kubectl -n elasticsearch get all NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deploy/es-master 3 3 3 3 32s NAME DESIRED CURRENT READY AGE rs/es-master-594b58b86c 3 3 3 31s NAME READY STATUS RESTARTS AGE po/es-master-594b58b86c-9jkj2 1/1 Running 0 31s po/es-master-594b58b86c-bj7g7 1/1 Running 0 31s po/es-master-594b58b86c-lfpps 1/1 Running 0 31s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE svc/elasticsearch-discovery ClusterIP None <none> 9300/TCP 31s

Sangat menarik untuk mempelajari log perapian di node master dan melihat bagaimana master dipilih di antara mereka sekarang dan bagaimana nantinya nanti ketika kita menambahkan node data baru dan node klien.


 root$ kubectl -n elasticsearch logs -f po/es-master-594b58b86c-9jkj2 | grep ClusterApplierService [2018-10-21T07:41:54,958][INFO ][oecsClusterApplierService] [es-master-594b58b86c-9jkj2] detected_master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300}, added {{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300},{es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [3]])

Di sini Anda dapat melihat bahwa di bawah es-master dengan nama es-master-594b58b86c-bj7g7 dipilih oleh master, dan dua pod lainnya ditambahkan ke dalamnya dan satu sama lain.


Layanan pencarian-elastik tanpa kepala dipasang secara default pada gambar Docker sebagai variabel lingkungan dan digunakan untuk deteksi dalam node. Pengaturan ini dapat diganti jika diinginkan.


Demikian pula, kami menggunakan simpul data dan simpul klien . Lihat konfigurasi di bawah ini.


Menyebarkan simpul data:


 kind: Namespace metadata: name: elasticsearch --- apiVersion: storage.k8s.io/v1beta1 kind: StorageClass metadata: name: fast provisioner: kubernetes.io/gce-pd parameters: type: pd-ssd fsType: xfs allowVolumeExpansion: true --- apiVersion: apps/v1beta1 kind: StatefulSet metadata: name: es-data namespace: elasticsearch labels: component: elasticsearch role: data spec: serviceName: elasticsearch-data replicas: 3 template: metadata: labels: component: elasticsearch role: data spec: affinity: podAntiAffinity: preferredDuringSchedulingIgnoredDuringExecution: - weight: 100 podAffinityTerm: labelSelector: matchExpressions: - key: role operator: In values: - data topologyKey: kubernetes.io/hostname initContainers: - name: init-sysctl image: busybox:1.27.2 command: - sysctl - -w - vm.max_map_count=262144 securityContext: privileged: true containers: - name: es-data image: quay.io/pires/docker-elasticsearch-kubernetes:6.2.4 env: - name: NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: NODE_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: CLUSTER_NAME value: my-es - name: NODE_MASTER value: "false" - name: NODE_INGEST value: "false" - name: HTTP_ENABLE value: "false" - name: ES_JAVA_OPTS value: -Xms256m -Xmx256m - name: PROCESSORS valueFrom: resourceFieldRef: resource: limits.cpu resources: limits: cpu: 2 ports: - containerPort: 9300 name: transport volumeMounts: - name: storage mountPath: /data volumeClaimTemplates: - metadata: name: storage annotations: volume.beta.kubernetes.io/storage-class: "fast" spec: accessModes: [ "ReadWriteOnce" ] storageClassName: fast resources: requests: storage: 10Gi --- apiVersion: v1 kind: Service metadata: name: elasticsearch-data namespace: elasticsearch labels: component: elasticsearch role: data spec: ports: - port: 9300 name: transport clusterIP: None selector: component: elasticsearch role: data view rawes-data.yml hosted with love by GitHub

(Layanan StatefulSet dan tanpa kepala untuk node data)


Layanan headless pada node data mengeluarkan pengidentifikasi jaringan yang stabil ke node dan membantu mentransfer data antar node.


Penting untuk memformat volume permanen sebelum memasangnya ke perapian. Cukup tentukan jenis volume saat Anda membuat kelas penyimpanan. Anda juga dapat mengatur parameter yang memungkinkan ekspansi volume otomatis . Baca detailnya di sini .


 parameters: type: pd-ssd fsType: xfs allowVolumeExpansion: true ...

Menyebarkan node klien:


 kind: Namespace metadata: name: elasticsearch --- apiVersion: apps/v1beta1 kind: Deployment metadata: name: es-client namespace: elasticsearch labels: component: elasticsearch role: client spec: replicas: 2 template: metadata: labels: component: elasticsearch role: client spec: affinity: podAntiAffinity: preferredDuringSchedulingIgnoredDuringExecution: - weight: 100 podAffinityTerm: labelSelector: matchExpressions: - key: role operator: In values: - client topologyKey: kubernetes.io/hostname initContainers: - name: init-sysctl image: busybox:1.27.2 command: - sysctl - -w - vm.max_map_count=262144 securityContext: privileged: true containers: - name: es-client image: quay.io/pires/docker-elasticsearch-kubernetes:6.2.4 env: - name: NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: NODE_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: CLUSTER_NAME value: my-es - name: NODE_MASTER value: "false" - name: NODE_DATA value: "false" - name: HTTP_ENABLE value: "true" - name: ES_JAVA_OPTS value: -Xms256m -Xmx256m - name: NETWORK_HOST value: _site_,_lo_ - name: PROCESSORS valueFrom: resourceFieldRef: resource: limits.cpu resources: limits: cpu: 1 ports: - containerPort: 9200 name: http - containerPort: 9300 name: transport volumeMounts: - name: storage mountPath: /data volumes: - emptyDir: medium: "" name: storage --- apiVersion: v1 kind: Service metadata: name: elasticsearch namespace: elasticsearch annotations: cloud.google.com/load-balancer-type: Internal labels: component: elasticsearch role: client spec: selector: component: elasticsearch role: client ports: - name: http port: 9200 type: LoadBalancer view rawes-client.yml hosted with love by GitHub

(Menyebarkan dan layanan eksternal untuk node klien)


Layanan yang digunakan di sini menyediakan akses ke kluster ES di luar kluster Kubernetes, tetapi masih di dalam subnet. Anotasi cloud.google.com/load-balancer-type: Internal bertanggung jawab untuk ini.


Tetapi jika aplikasi yang mengakses cluster ES untuk membaca dan menulis digunakan di dalam cluster, maka akses ke layanan ElasticSearch dapat diperoleh di http: //elasticsearch.elasticsearch: 9200 .


Ketika Anda memperluas node data dan node klien, mereka akan ditambahkan ke cluster secara otomatis. (Cari master di bawah log)


 root$ kubectl -n elasticsearch get pods -l role=data NAME READY STATUS RESTARTS AGE es-data-0 1/1 Running 0 48s es-data-1 1/1 Running 0 28s -------------------------------------------------------------------- root$ kubectl apply -f es-client.yml root$ kubectl -n elasticsearch get pods -l role=client NAME READY STATUS RESTARTS AGE es-client-69b84b46d8-kr7j4 1/1 Running 0 47s es-client-69b84b46d8-v5pj2 1/1 Running 0 47s -------------------------------------------------------------------- root$ kubectl -n elasticsearch get all NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deploy/es-client 2 2 2 2 1m deploy/es-master 3 3 3 3 9m NAME DESIRED CURRENT READY AGE rs/es-client-69b84b46d8 2 2 2 1m rs/es-master-594b58b86c 3 3 3 9m NAME DESIRED CURRENT AGE statefulsets/es-data 2 2 3m NAME READY STATUS RESTARTS AGE po/es-client-69b84b46d8-kr7j4 1/1 Running 0 1m po/es-client-69b84b46d8-v5pj2 1/1 Running 0 1m po/es-data-0 1/1 Running 0 3m po/es-data-1 1/1 Running 0 3m po/es-master-594b58b86c-9jkj2 1/1 Running 0 9m po/es-master-594b58b86c-bj7g7 1/1 Running 0 9m po/es-master-594b58b86c-lfpps 1/1 Running 0 9m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE svc/elasticsearch LoadBalancer 10.9.121.160 10.9.120.8 9200:32310/TCP 1m svc/elasticsearch-data ClusterIP None <none> 9300/TCP 3m svc/elasticsearch-discovery ClusterIP None <none> 9300/TCP 9m -------------------------------------------------------------------- #Check logs of es-master leader pod root$ kubectl -n elasticsearch logs po/es-master-594b58b86c-bj7g7 | grep ClusterApplierService [2018-10-21T07:41:53,731][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] new_master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300}, added {{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [1] source [zen-disco-elected-as-master ([1] nodes joined)[{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300}]]]) [2018-10-21T07:41:55,162][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [3] source [zen-disco-node-join[{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300}]]]) [2018-10-21T07:48:02,485][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [4] source [zen-disco-node-join[{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300}]]]) [2018-10-21T07:48:21,984][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [5] source [zen-disco-node-join[{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300}]]]) [2018-10-21T07:50:51,245][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [6] source [zen-disco-node-join[{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300}]]]) [2018-10-21T07:50:58,964][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [7] source [zen-disco-node-join[{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300}]]]) ] [es-master-594b58b86c-bj7g7] menambahkan {{es-master-594b58b86c-9jkj2} {x9Prp1VbTq6_kALQVNwIWg} {7NHUSVpuS0mFDTXzAeKRcg} {10.9.125.81} {10,9 root$ kubectl -n elasticsearch get pods -l role=data NAME READY STATUS RESTARTS AGE es-data-0 1/1 Running 0 48s es-data-1 1/1 Running 0 28s -------------------------------------------------------------------- root$ kubectl apply -f es-client.yml root$ kubectl -n elasticsearch get pods -l role=client NAME READY STATUS RESTARTS AGE es-client-69b84b46d8-kr7j4 1/1 Running 0 47s es-client-69b84b46d8-v5pj2 1/1 Running 0 47s -------------------------------------------------------------------- root$ kubectl -n elasticsearch get all NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deploy/es-client 2 2 2 2 1m deploy/es-master 3 3 3 3 9m NAME DESIRED CURRENT READY AGE rs/es-client-69b84b46d8 2 2 2 1m rs/es-master-594b58b86c 3 3 3 9m NAME DESIRED CURRENT AGE statefulsets/es-data 2 2 3m NAME READY STATUS RESTARTS AGE po/es-client-69b84b46d8-kr7j4 1/1 Running 0 1m po/es-client-69b84b46d8-v5pj2 1/1 Running 0 1m po/es-data-0 1/1 Running 0 3m po/es-data-1 1/1 Running 0 3m po/es-master-594b58b86c-9jkj2 1/1 Running 0 9m po/es-master-594b58b86c-bj7g7 1/1 Running 0 9m po/es-master-594b58b86c-lfpps 1/1 Running 0 9m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE svc/elasticsearch LoadBalancer 10.9.121.160 10.9.120.8 9200:32310/TCP 1m svc/elasticsearch-data ClusterIP None <none> 9300/TCP 3m svc/elasticsearch-discovery ClusterIP None <none> 9300/TCP 9m -------------------------------------------------------------------- #Check logs of es-master leader pod root$ kubectl -n elasticsearch logs po/es-master-594b58b86c-bj7g7 | grep ClusterApplierService [2018-10-21T07:41:53,731][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] new_master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300}, added {{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [1] source [zen-disco-elected-as-master ([1] nodes joined)[{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300}]]]) [2018-10-21T07:41:55,162][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [3] source [zen-disco-node-join[{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300}]]]) [2018-10-21T07:48:02,485][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [4] source [zen-disco-node-join[{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300}]]]) [2018-10-21T07:48:21,984][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [5] source [zen-disco-node-join[{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300}]]]) [2018-10-21T07:50:51,245][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [6] source [zen-disco-node-join[{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300}]]]) [2018-10-21T07:50:58,964][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [7] source [zen-disco-node-join[{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300}]]]) ] [es-master-594b58b86c-bj7g7] menambahkan {{es-data- root$ kubectl -n elasticsearch get pods -l role=data NAME READY STATUS RESTARTS AGE es-data-0 1/1 Running 0 48s es-data-1 1/1 Running 0 28s -------------------------------------------------------------------- root$ kubectl apply -f es-client.yml root$ kubectl -n elasticsearch get pods -l role=client NAME READY STATUS RESTARTS AGE es-client-69b84b46d8-kr7j4 1/1 Running 0 47s es-client-69b84b46d8-v5pj2 1/1 Running 0 47s -------------------------------------------------------------------- root$ kubectl -n elasticsearch get all NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deploy/es-client 2 2 2 2 1m deploy/es-master 3 3 3 3 9m NAME DESIRED CURRENT READY AGE rs/es-client-69b84b46d8 2 2 2 1m rs/es-master-594b58b86c 3 3 3 9m NAME DESIRED CURRENT AGE statefulsets/es-data 2 2 3m NAME READY STATUS RESTARTS AGE po/es-client-69b84b46d8-kr7j4 1/1 Running 0 1m po/es-client-69b84b46d8-v5pj2 1/1 Running 0 1m po/es-data-0 1/1 Running 0 3m po/es-data-1 1/1 Running 0 3m po/es-master-594b58b86c-9jkj2 1/1 Running 0 9m po/es-master-594b58b86c-bj7g7 1/1 Running 0 9m po/es-master-594b58b86c-lfpps 1/1 Running 0 9m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE svc/elasticsearch LoadBalancer 10.9.121.160 10.9.120.8 9200:32310/TCP 1m svc/elasticsearch-data ClusterIP None <none> 9300/TCP 3m svc/elasticsearch-discovery ClusterIP None <none> 9300/TCP 9m -------------------------------------------------------------------- #Check logs of es-master leader pod root$ kubectl -n elasticsearch logs po/es-master-594b58b86c-bj7g7 | grep ClusterApplierService [2018-10-21T07:41:53,731][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] new_master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300}, added {{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [1] source [zen-disco-elected-as-master ([1] nodes joined)[{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300}]]]) [2018-10-21T07:41:55,162][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [3] source [zen-disco-node-join[{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300}]]]) [2018-10-21T07:48:02,485][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [4] source [zen-disco-node-join[{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300}]]]) [2018-10-21T07:48:21,984][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [5] source [zen-disco-node-join[{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300}]]]) [2018-10-21T07:50:51,245][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [6] source [zen-disco-node-join[{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300}]]]) [2018-10-21T07:50:58,964][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [7] source [zen-disco-node-join[{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300}]]]) 10.9.125.82} {10.9.125.82 root$ kubectl -n elasticsearch get pods -l role=data NAME READY STATUS RESTARTS AGE es-data-0 1/1 Running 0 48s es-data-1 1/1 Running 0 28s -------------------------------------------------------------------- root$ kubectl apply -f es-client.yml root$ kubectl -n elasticsearch get pods -l role=client NAME READY STATUS RESTARTS AGE es-client-69b84b46d8-kr7j4 1/1 Running 0 47s es-client-69b84b46d8-v5pj2 1/1 Running 0 47s -------------------------------------------------------------------- root$ kubectl -n elasticsearch get all NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deploy/es-client 2 2 2 2 1m deploy/es-master 3 3 3 3 9m NAME DESIRED CURRENT READY AGE rs/es-client-69b84b46d8 2 2 2 1m rs/es-master-594b58b86c 3 3 3 9m NAME DESIRED CURRENT AGE statefulsets/es-data 2 2 3m NAME READY STATUS RESTARTS AGE po/es-client-69b84b46d8-kr7j4 1/1 Running 0 1m po/es-client-69b84b46d8-v5pj2 1/1 Running 0 1m po/es-data-0 1/1 Running 0 3m po/es-data-1 1/1 Running 0 3m po/es-master-594b58b86c-9jkj2 1/1 Running 0 9m po/es-master-594b58b86c-bj7g7 1/1 Running 0 9m po/es-master-594b58b86c-lfpps 1/1 Running 0 9m NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE svc/elasticsearch LoadBalancer 10.9.121.160 10.9.120.8 9200:32310/TCP 1m svc/elasticsearch-data ClusterIP None <none> 9300/TCP 3m svc/elasticsearch-discovery ClusterIP None <none> 9300/TCP 9m -------------------------------------------------------------------- #Check logs of es-master leader pod root$ kubectl -n elasticsearch logs po/es-master-594b58b86c-bj7g7 | grep ClusterApplierService [2018-10-21T07:41:53,731][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] new_master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300}, added {{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [1] source [zen-disco-elected-as-master ([1] nodes joined)[{es-master-594b58b86c-lfpps}{wZQmXr5fSfWisCpOHBhaMg}{50jGPeKLSpO9RU_HhnVJCA}{10.9.124.81}{10.9.124.81:9300}]]]) [2018-10-21T07:41:55,162][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [3] source [zen-disco-node-join[{es-master-594b58b86c-9jkj2}{x9Prp1VbTq6_kALQVNwIWg}{7NHUSVpuS0mFDTXzAeKRcg}{10.9.125.81}{10.9.125.81:9300}]]]) [2018-10-21T07:48:02,485][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [4] source [zen-disco-node-join[{es-data-0}{SAOhUiLiRkazskZ_TC6EBQ}{qirmfVJBTjSBQtHZnz-QZw}{10.9.126.88}{10.9.126.88:9300}]]]) [2018-10-21T07:48:21,984][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [5] source [zen-disco-node-join[{es-data-1}{fiv5Wh29TRWGPumm5ypJfA}{EXqKGSzIQquRyWRzxIOWhQ}{10.9.125.82}{10.9.125.82:9300}]]]) [2018-10-21T07:50:51,245][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [6] source [zen-disco-node-join[{es-client-69b84b46d8-v5pj2}{MMjA_tlTS7ux-UW44i0osg}{rOE4nB_jSmaIQVDZCjP8Rg}{10.9.125.83}{10.9.125.83:9300}]]]) [2018-10-21T07:50:58,964][INFO ][oecsClusterApplierService] [es-master-594b58b86c-bj7g7] added {{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300},}, reason: apply cluster state (from master [master {es-master-594b58b86c-bj7g7}{1aFT97hQQ7yiaBc2CYShBA}{Q3QzlaG3QGazOwtUl7N75Q}{10.9.126.87}{10.9.126.87:9300} committed version [7] source [zen-disco-node-join[{es-client-69b84b46d8-kr7j4}{gGC7F4diRWy2oM1TLTvNsg}{IgI6g3iZT5Sa0HsFVMpvvw}{10.9.124.82}{10.9.124.82:9300}]]])

Log dari master pod utama jelas menunjukkan kapan setiap node ditambahkan ke cluster. Ini berguna untuk diketahui saat melakukan debug.


Kami telah mengerahkan semua komponen, dan sekarang kami perlu memeriksa:


1) Menyebarkan Elasticsearch dari cluster Kubernetes menggunakan wadah Ubuntu.


 root$ kubectl run my-shell --rm -i --tty --image ubuntu -- bash root@my-shell-68974bb7f7-pj9x6:/# curl http://elasticsearch.elasticsearch:9200/_cluster/health?pretty { "cluster_name" : "my-es", "status" : "green", "timed_out" : false, "number_of_nodes" : 7, "number_of_data_nodes" : 2, "active_primary_shards" : 0, "active_shards" : 0, "relocating_shards" : 0, "initializing_shards" : 0, "unassigned_shards" : 0, "delayed_unassigned_shards" : 0, "number_of_pending_tasks" : 0, "number_of_in_flight_fetch" : 0, "task_max_waiting_in_queue_millis" : 0, "active_shards_percent_as_number" : 100.0 }

2) Menyebarkan Elasticsearch dari luar cluster melalui IP dari GCP penyeimbang internal (dalam kasus kami, 10.9.120.8 ).


 root$ curl http://10.9.120.8:9200/_cluster/health?pretty { "cluster_name" : "my-es", "status" : "green", "timed_out" : false, "number_of_nodes" : 7, "number_of_data_nodes" : 2, "active_primary_shards" : 0, "active_shards" : 0, "relocating_shards" : 0, "initializing_shards" : 0, "unassigned_shards" : 0, "delayed_unassigned_shards" : 0, "number_of_pending_tasks" : 0, "number_of_in_flight_fetch" : 0, "task_max_waiting_in_queue_millis" : 0, "active_shards_percent_as_number" : 100.0 }

3) Aturan anti-afinitas untuk perapian ES.


 root$ kubectl -n elasticsearch get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE es-client-69b84b46d8-kr7j4 1/1 Running 0 10m 10.8.14.52 gke-cluster1-pool1-d2ef2b34-t6h9 es-client-69b84b46d8-v5pj2 1/1 Running 0 10m 10.8.15.53 gke-cluster1-pool1-42b4fbc4-cncn es-data-0 1/1 Running 0 12m 10.8.16.58 gke-cluster1-pool1-4cfd808c-kpx1 es-data-1 1/1 Running 0 12m 10.8.15.52 gke-cluster1-pool1-42b4fbc4-cncn es-master-594b58b86c-9jkj2 1/1 Running 0 18m 10.8.15.51 gke-cluster1-pool1-42b4fbc4-cncn es-master-594b58b86c-bj7g7 1/1 Running 0 18m 10.8.16.57 gke-cluster1-pool1-4cfd808c-kpx1 es-master-594b58b86c-lfpps 1/1 Running 0 18m 10.8.14.51 gke-cluster1-pool1-d2ef2b34-t6h9

Perhatikan bahwa kami tidak memiliki dua perapian serupa pada simpul yang sama, jadi kami memastikan keandalan yang tinggi jika terjadi kegagalan simpul.


Scaling


Kami dapat menggunakan layanan autoscaling untuk node klien tergantung pada batas CPU. Contoh HPA untuk simpul klien:


 apiVersion: autoscaling/v1 kind: HorizontalPodAutoscaler metadata: name: es-client namespace: elasticsearch spec: maxReplicas: 5 minReplicas: 2 scaleTargetRef: apiVersion: extensions/v1beta1 kind: Deployment name: es-client targetCPUUtilizationPercentage: 80

Penskalaan otomatis menambahkan pod pada node klien ke cluster, dan ini dapat dilihat pada log dari pod apa saja pada node master.


Untuk pod pada node data , Anda hanya perlu menambah jumlah replika di panel kontrol Kubernetes atau di konsol GKE. Node data yang dibuat itu sendiri akan ditambahkan ke cluster dan akan mulai mereplikasi data dari node lain.


Saya tidak perlu melakukan penskalaan otomatis pada node master - mereka hanya menyimpan data tentang status cluster. Tetapi jika Anda akan menambahkan data node, pastikan bahwa jumlah master node dalam cluster adalah ganjil , dan jangan lupa untuk mengubah variabel NUMBER_OF_MASTERS untuk lingkungan.


Menyebarkan Kibana dan ES-HQ


Kibana dan ES-HQ


Kibana adalah alat sederhana untuk memvisualisasikan data ES, dan ES-HQ membantu mengelola dan memantau cluster Elasticsearch. Saat menggunakan Kibana dan ES-HQ, ingat bahwa:


  • Kami meneruskan nama cluster ES ke gambar Docker sebagai variabel lingkungan.
  • Layanan untuk akses ke penyebaran Kibana / ES-HQ tetap berada di dalam perusahaan, yaitu IP publik tidak dibuat. Kami menggunakan penyeimbang beban GCP internal.

Sebarkan Kibana


 kind: Namespace metadata: name: elasticsearch --- apiVersion: apps/v1beta1 kind: Deployment metadata: name: es-kibana namespace: elasticsearch labels: component: elasticsearch role: kibana spec: replicas: 1 template: metadata: labels: component: elasticsearch role: kibana spec: containers: - name: es-kibana image: docker.elastic.co/kibana/kibana-oss:6.2.2 env: - name: CLUSTER_NAME value: my-es - name: ELASTICSEARCH_URL value: http://elasticsearch:9200 resources: limits: cpu: 0.5 ports: - containerPort: 5601 name: http --- apiVersion: v1 kind: Service metadata: name: kibana annotations: cloud.google.com/load-balancer-type: "Internal" namespace: elasticsearch labels: component: elasticsearch role: kibana spec: selector: component: elasticsearch role: kibana ports: - name: http port: 80 targetPort: 5601 protocol: TCP type: LoadBalancer view rawes-kibana.yml hosted with love by GitHub

(Penyebaran dan layanan Kibana)


Menyebarkan ES-HQ


 kind: Namespace metadata: name: elasticsearch --- apiVersion: apps/v1beta1 kind: Deployment metadata: name: es-hq namespace: elasticsearch labels: component: elasticsearch role: hq spec: replicas: 1 template: metadata: labels: component: elasticsearch role: hq spec: containers: - name: es-hq image: elastichq/elasticsearch-hq:release-v3.4.0 env: - name: HQ_DEFAULT_URL value: http://elasticsearch:9200 resources: limits: cpu: 0.5 ports: - containerPort: 5000 name: http --- apiVersion: v1 kind: Service metadata: name: hq annotations: cloud.google.com/load-balancer-type: "Internal" namespace: elasticsearch labels: component: elasticsearch role: hq spec: selector: component: elasticsearch role: hq ports: - name: http port: 80 targetPort: 5000 protocol: TCP type: LoadBalancer view rawes-hq.yml hosted with love by GitHub

(Menyebarkan dan layanan ES-HQ)


Kami mengakses kedua layanan melalui penyeimbang internal yang dibuat.


 root$ kubectl -n elasticsearch get svc -l role=kibana NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kibana LoadBalancer 10.9.121.246 10.9.120.10 80:31400/TCP 1m root$ kubectl -n elasticsearch get svc -l role=hq NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE hq LoadBalancer 10.9.121.150 10.9.120.9 80:31499/TCP 1m

http: // <External-Ip-Kibana-Service> / app / kibana # / home? _g = ()



(Panel Kontrol Kibana)


http: // <External-Ip-ES-Hq-Service> / #! / cluster / my-es



(Panel kontrol ElasticHQ untuk memantau dan mengelola cluster)


ES adalah salah satu sistem pencarian dan analisis terdistribusi yang paling populer, dan di Kubernetes ia memecahkan masalah utama penskalaan dan ketersediaan tinggi. Selain itu, kluster ES baru di Kubernet disebarkan secara instan.

Source: https://habr.com/ru/post/id432374/

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