ECK安装elasticsearch,接入apm测试

2021-08-21 22:10:19

任务目标

以前都是用helm安装elasticsearch，最近发现elasticsearch推荐使用ECK在K8S上安装，那我们就来试试吧

我们会在已有的K8S上安装ECK,elasticsearch，kibana，apm，关闭ssl，loadbalancer暴露应用访问

测试golang接入apm

ECK创建过程

1.先安装上operator

kubectl create -f https://download.elastic.co/downloads/eck/1.7.1/crds.yaml
kubectl apply -f https://download.elastic.co/downloads/eck/1.7.1/operator.yaml

2.安装elasticsearch

cat <<EOF | kubectl apply -f -
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
  name: quickstart
spec:
  version: 7.14.1
  nodeSets:
  - name: default
    count: 1
    config:
      node.store.allow_mmap: false
EOF

3.安装kibana

cat <<EOF | kubectl apply -f -
apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: quickstart
spec:
  version: 7.14.1
  count: 1
  elasticsearchRef:
    name: quickstart
EOF

4.安装apm

cat <<EOF | kubectl apply -f -
apiVersion: apm.k8s.elastic.co/v1
kind: ApmServer
metadata:
  name: apm-server-quickstart
  namespace: default
spec:
  version: 7.14.1
  count: 1
  elasticsearchRef:
    name: quickstart
EOF

5.暴露kibana可外部访问，并且关闭ssl

kubectl edit kibanas.kibana.k8s.elastic.co quickstart。这里只贴上关键的spec部分代码

spec:
  count: 1
  elasticsearchRef:
    name: quickstart
  enterpriseSearchRef:
    name: ""
  http:
    service:
      metadata: {}
      spec:
        type: LoadBalancer
    tls:
      selfSignedCertificate:
        disabled: true

6.暴露apm可外部访问

kubectl edit apmserver.apm.k8s.elastic.co/apm-server-quickstart

修改的内容与上面kibana修改内容一致。

7.获取kibana登录用户名和密码

默认用户名 elastic

默认密码使用如下命令获取

kubectl get secret quickstart-es-elastic-user -o go-template='{{.data.elastic | base64decode }}'

8.获取apm-server的secret-token

kubectl get secret/apm-server-quickstart-apm-token -o go-template='{{index .data "secret-token" | base64decode}}'

golang测试APM-SERVER通信

1.设置环境变量，

# 服务名，不设置的话，就是代码的文件名
export ELASTIC_APM_SERVICE_NAME=
# apm服务器地址
export ELASTIC_APM_SERVER_URL=http://localhost:8200
# 我们上一步拿到的token
export ELASTIC_APM_SECRET_TOKEN=
# 可以设置也可以不设置，用于标识环境的，类似标签功能
export ELASTIC_APM_ENVIRONMENT=

2.编写golang测试代码main.go

package main
import (
    "fmt"
    "log"
    "net/http"
    "github.com/gorilla/mux"
    "go.elastic.co/apm/module/apmgorilla"
)
func helloHandler(w http.ResponseWriter, req *http.Request) {
    fmt.Fprintf(w, "Hello, %s!\n", mux.Vars(req)["name"])
}
func main() {
    r := mux.NewRouter()
    r.HandleFunc("/hello/{name}", helloHandler)
    r.Use(apmgorilla.Middleware())
    log.Fatal(http.ListenAndServe(":8000", r))
}

3,在kibana上检查apm的信息，应该会看到一个main的server，有一些数据，如下图所示，证明apm可成功连通

ECK安装elasticsearch,接入apm测试

码农公寓

任务目标

ECK创建过程

golang测试APM-SERVER通信

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