配置和安装 EFK
官方文件目录:cluster/addons/fluentd-elasticsearch
$ ls *.yaml
es-controller.yaml es-service.yaml fluentd-es-ds.yaml kibana-controller.yaml kibana-service.yaml efk-rbac.yaml
同样EFK服务也需要一个efk-rbac.yaml
文件,配置serviceaccount为efk
。
已经修改好的 yaml 文件见:EFK
配置 es-controller.yaml
# cat es-controller.yaml
apiVersion: v1
kind: ReplicationController
metadata:
name: elasticsearch-logging-v1
namespace: kube-system
labels:
k8s-app: elasticsearch-logging
version: v1
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
replicas: 2
selector:
k8s-app: elasticsearch-logging
version: v1
template:
metadata:
labels:
k8s-app: elasticsearch-logging
version: v1
kubernetes.io/cluster-service: "true"
spec:
serviceAccountName: efk
containers:
- image: index.tenxcloud.com/docker_library/elasticsearch:2.2.0
name: elasticsearch-logging
resources:
# need more cpu upon initialization, therefore burstable class
limits:
cpu: 1000m
requests:
cpu: 100m
ports:
- containerPort: 9200
name: db
protocol: TCP
- containerPort: 9300
name: transport
protocol: TCP
volumeMounts:
- name: es-persistent-storage
mountPath: /data
env:
- name: "NAMESPACE"
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumes:
- name: es-persistent-storage
emptyDir: {}
配置 es-service.yaml
无需修改
配置 fluentd-es-ds.yaml
# cat fluentd-es-ds.yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: fluentd-es-v1.22
namespace: kube-system
labels:
k8s-app: fluentd-es
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
version: v1.22
spec:
template:
metadata:
labels:
k8s-app: fluentd-es
kubernetes.io/cluster-service: "true"
version: v1.22
# This annotation ensures that fluentd does not get evicted if the node
# supports critical pod annotation based priority scheme.
# Note that this does not guarantee admission on the nodes (#40573).
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ‘‘
spec:
serviceAccountName: fluentd
containers:
- name: fluentd-es
image: index.tenxcloud.com/zhangshun/fluentd-elasticsearch:v1
command:
- ‘/bin/sh‘
- ‘-c‘
- ‘/usr/sbin/td-agent 2>&1 >> /var/log/fluentd.log‘
resources:
limits:
memory: 200Mi
requests:
cpu: 100m
memory: 200Mi
volumeMounts:
- name: varlog
mountPath: /var/log
- name: varlibdockercontainers
mountPath: /var/lib/docker/containers
readOnly: true
nodeSelector:
beta.kubernetes.io/fluentd-ds-ready: "true"
tolerations:
- key : "node.alpha.kubernetes.io/ismaster"
effect: "NoSchedule"
terminationGracePeriodSeconds: 30
volumes:
- name: varlog
hostPath:
path: /var/log
- name: varlibdockercontainers
hostPath:
path: /var/lib/docker/containers
配置 kibana-controller.yaml
# cat kibana-controller.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: kibana-logging
namespace: kube-system
labels:
k8s-app: kibana-logging
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
replicas: 1
selector:
matchLabels:
k8s-app: kibana-logging
template:
metadata:
labels:
k8s-app: kibana-logging
spec:
serviceAccountName: efk
containers:
- name: kibana-logging
image: index.tenxcloud.com/docker_library/kibana:4.5.1
resources:
# keep request = limit to keep this container in guaranteed class
limits:
cpu: 100m
requests:
cpu: 100m
env:
- name: "ELASTICSEARCH_URL"
value: "http://elasticsearch-logging:9200"
- name: "KIBANA_BASE_URL"
value: "/api/v1/proxy/namespaces/kube-system/services/kibana-logging"
ports:
- containerPort: 5601
name: ui
protocol: TCP
给 Node 设置标签
定义 DaemonSet fluentd-es-v1.22
时设置了 nodeSelector beta.kubernetes.io/fluentd-ds-ready=true
,所以需要在期望运行 fluentd 的 Node 上设置该标签;
# kubectl get nodes
NAME STATUS AGE VERSION
192.168.1.122 Ready 22h v1.6.2
192.168.1.123 Ready 22h v1.6.2
# kubectl label nodes 192.168.1.122 beta.kubernetes.io/fluentd-ds-ready=true
node "172.20.0.112" labeled
# kubectl label nodes 192.168.1.123 beta.kubernetes.io/fluentd-ds-ready=true
node "172.20.0.123" labeled
给其他两台node打上同样的标签。
执行定义文件
$ kubectl create -f .
serviceaccount "efk" created
clusterrolebinding "efk" created
replicationcontroller "elasticsearch-logging-v1" created
service "elasticsearch-logging" created
daemonset "fluentd-es-v1.22" created
deployment "kibana-logging" created
service "kibana-logging" created
检查执行结果
$ kubectl get deployment -n kube-system|grep kibana
kibana-logging 1 1 1 1 2m
$ kubectl get pods -n kube-system|grep -E ‘elasticsearch|fluentd|kibana‘
elasticsearch-logging-v1-mlstp 1/1 Running 0 1m
elasticsearch-logging-v1-nfbbf 1/1 Running 0 1m
fluentd-es-v1.22-31sm0 1/1 Running 0 1m
fluentd-es-v1.22-bpgqs 1/1 Running 0 1m
fluentd-es-v1.22-qmn7h 1/1 Running 0 1m
kibana-logging-1432287342-0gdng 1/1 Running 0 1m
$ kubectl get service -n kube-system|grep -E ‘elasticsearch|kibana‘
elasticsearch-logging 10.254.77.62 <none> 9200/TCP 2m
kibana-logging 10.254.8.113 <none> 5601/TCP 2m
kibana Pod 第一次启动时会用较长时间(10-20分钟)来优化和 Cache 状态页面,可以 tailf 该 Pod 的日志观察进度:
$ kubectl logs kibana-logging-1432287342-0gdng -n kube-system -f
ELASTICSEARCH_URL=http://elasticsearch-logging:9200
server.basePath: /api/v1/proxy/namespaces/kube-system/services/kibana-logging
{"type":"log","@timestamp":"2017-07-26T13:08:06Z","tags":["info","optimize"],"pid":7,"message":"Optimizing and caching bundles for kibana and statusPage. This may take a few minutes"}
{"type":"log","@timestamp":"2017-07-26T13:18:17Z","tags":["info","optimize"],"pid":7,"message":"Optimization of bundles for kibana and statusPage complete in 610.40 seconds"}
{"type":"log","@timestamp":"2017-07-26T13:18:17Z","tags":["status","plugin:kibana@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:18Z","tags":["status","plugin:elasticsearch@1.0.0","info"],"pid":7,"state":"yellow","message":"Status changed from uninitialized to yellow - Waiting for Elasticsearch","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["status","plugin:kbn_vislib_vis_types@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["status","plugin:markdown_vis@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["status","plugin:metric_vis@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["status","plugin:spyModes@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["status","plugin:statusPage@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["status","plugin:table_vis@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from uninitialized to green - Ready","prevState":"uninitialized","prevMsg":"uninitialized"}
{"type":"log","@timestamp":"2017-07-26T13:18:19Z","tags":["listening","info"],"pid":7,"message":"Server running at http://0.0.0.0:5601"}
{"type":"log","@timestamp":"2017-07-26T13:18:24Z","tags":["status","plugin:elasticsearch@1.0.0","info"],"pid":7,"state":"yellow","message":"Status changed from yellow to yellow - No existing Kibana index found","prevState":"yellow","prevMsg":"Waiting for Elasticsearch"}
{"type":"log","@timestamp":"2017-07-26T13:18:29Z","tags":["status","plugin:elasticsearch@1.0.0","info"],"pid":7,"state":"green","message":"Status changed from yellow to green - Kibana index ready","prevState":"yellow","prevMsg":"No existing Kibana index found"}
访问 kibana
- 通过 kube-apiserver 访问:
获取 monitoring-grafana 服务 URL
# kubectl cluster-info
Kubernetes master is running at https://192.168.1.121:6443
Elasticsearch is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/elasticsearch-logging
Heapster is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/heapster
Kibana is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/kibana-logging
KubeDNS is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/kube-dns
kubernetes-dashboard is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/kubernetes-dashboard
monitoring-grafana is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/monitoring-grafana
monitoring-influxdb is running at https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/monitoring-influxd
浏览器访问 URL: `https://192.168.1.121:6443/api/v1/proxy/namespaces/kube-system/services/kibana-logging/app/kibana`
通过 kubectl proxy 访问:
创建代理
$ kubectl proxy --address=‘192.168.1.121‘ --port=8086 --accept-hosts=‘^*$‘ Starting to serve on 192.168.1.121:8086
浏览器访问 URL:
http://192.168.1.121:8086/api/v1/proxy/namespaces/kube-system/services/kibana-logging
在 Settings -> Indices 页面创建一个 index(相当于 mysql 中的一个 database),选中 Index contains time-based events
,使用默认的 logstash-*
pattern,点击 Create
;
可能遇到的问题
如果你在这里发现Create按钮是灰色的无法点击,且Time-filed name中没有选项,fluentd要读取/var/log/containers/
目录下的log日志,这些日志是从/var/lib/docker/containers/${CONTAINER_ID}/${CONTAINER_ID}-json.log
链接过来的,查看你的docker配置,—log-dirver
需要设置为json-file格式,默认的可能是journald,参考docker logging。
创建Index后,可以在 Discover
下看到 ElasticSearch logging 中汇聚的日志;