问题描述
在 minikube 中,API 服务器无法连接到我的审计日志 webhook,我在 api-server 日志中看到以下错误
E0308 08:30:26.457841 1 metrics.go:109] Error in audit plugin 'webhook' affecting 400 audit events: Post "http://ca-audit.armo-system:8888/": dial tcp: lookup ca-audit.armo-system on 10.42.4.254:53: no such host
我不知道为什么 api-server 连接到 10.42.4.254:53
,因为我的服务 ip 不同:
$ kubectl -n armo-system get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ca-audit ClusterIP 10.109.132.114 <none> 8888/TCP 8m33s
我不明白我做错了什么,有什么建议吗?
这是我如何配置我的审核策略、webhook 和 minikube-
我按照以下方式预先配置了我的 minikube:
# Create the webhook config and audit policy
export C_CONTEXT=$(kubectl config current-context)
export C_NAME=$(kubectl config get-contexts ${C_CONTEXT} --no-headers | awk '{print $2}')
export C_CLUSTER=$(kubectl config get-contexts ${C_CONTEXT} --no-headers | awk '{print $3}')
export C_USER=$(kubectl config get-contexts ${C_CONTEXT} --no-headers | awk '{print $4}')
export ARMO_NAMESPACE="armo-system"
export ARMO_AUDIT_SERVICE="ca-audit"
export ARMO_AUDIT_PORT=8888
mkdir -p ~/.minikube/files/etc/ssl/certs
cat <<EOF > ~/.minikube/files/etc/ssl/certs/audit-webhook.yaml
{
"apiVersion": "v1","clusters": [
{
"cluster": {
"server": "http://${ARMO_AUDIT_SERVICE}.${ARMO_NAMESPACE}:${ARMO_AUDIT_PORT}/"
},"name": "${C_NAME}"
}
],"contexts": [
{
"context": {
"cluster": "${C_CLUSTER}","user": "${C_USER}"
},"current-context": "${C_CONTEXT}","kind": "Config","preferences": {},"users": []
}
EOF
cat <<EOF > ~/.minikube/files/etc/ssl/certs/audit-policy.yaml
{
"apiVersion": "audit.k8s.io/v1","kind": "Policy","rules": [
{
"level": "Metadata"
}
]
}
EOF
# copy the audit policy to `/etc/ssl/certs/.`
sudo cp ~/.minikube/files/etc/ssl/certs/audit-policy.yaml ~/.minikube/files/etc/ssl/certs/audit-webhook.yaml /etc/ssl/certs/.
# Start the minikube,add the flags `--extra-config=apiserver.audit-policy-file=/etc/ssl/certs/audit-policy.yaml`,`--extra-config=apiserver.audit-webhook-config-file=/etc/ssl/certs/audit-webhook.yaml`
sudo -E minikube start --vm-driver=none --extra-config=apiserver.audit-policy-file=/etc/ssl/certs/audit-policy.yaml --extra-config=apiserver.audit-webhook-config-file=/etc/ssl/certs/audit-webhook.yaml
现在我的 minikube 已启动并运行,我创建了命名空间、服务和 webhook 部署:
cat <<EOF | kubectl apply -f -
---
apiVersion: v1
kind: Namespace
Metadata:
name: ${ARMO_NAMESPACE}
---
kind: Service
apiVersion: v1
Metadata:
labels:
app: ${ARMO_AUDIT_SERVICE}
name: ${ARMO_AUDIT_SERVICE}
namespace: ${ARMO_NAMESPACE}
spec:
ports:
- port: ${ARMO_AUDIT_PORT}
targetPort: ${ARMO_AUDIT_PORT}
protocol: TCP
selector:
app: ${ARMO_AUDIT_SERVICE}
---
apiVersion: apps/v1
kind: Deployment
Metadata:
name: ${ARMO_AUDIT_SERVICE}
namespace: ${ARMO_NAMESPACE}
labels:
app: ${ARMO_AUDIT_SERVICE}
spec:
selector:
matchLabels:
app: ${ARMO_AUDIT_SERVICE}
replicas: 1
template:
Metadata:
labels:
app: ${ARMO_AUDIT_SERVICE}
spec:
containers:
- name: ${ARMO_AUDIT_SERVICE}
image: quay.io/armosec/k8s-ca-auditlog-ubi:dummy
imagePullPolicy: Always
env:
- name: ARMO_AUDIT_PORT
value: "${ARMO_AUDIT_PORT}"
ports:
- containerPort: ${ARMO_AUDIT_PORT}
name: ${ARMO_AUDIT_SERVICE}
EOF
webhook 图片代码(quay.io/armosec/k8s-ca-auditlog-ubi:dummy
)如下:
package main
import (
"encoding/json"
"flag"
"fmt"
"net/http"
"os"
"k8s.io/apiserver/pkg/apis/audit"
"github.com/golang/glog"
)
func main() {
flag.Parse()
flag.Set("alsologtostderr","1") // display logs in stdout
InitServer()
}
// InitServer - Initialize webhook listener
func InitServer() {
port,ok := os.LookupEnv("ARMO_AUDIT_PORT")
if !ok {
port = "8888"
}
glog.Infof("Webhook listening on port: %s,path: %s",port,"/")
http.HandleFunc("/",HandleRequest)
glog.Fatal(http.ListenAndServe(fmt.Sprintf(":%s",port),nil))
}
//HandleRequest -
func HandleRequest(w http.ResponseWriter,req *http.Request) {
eventList := audit.EventList{}
err := json.NewDecoder(req.Body).Decode(&eventList)
if err != nil {
e := fmt.Errorf("Failed parsing api-server request,reason: %s",err.Error())
glog.Errorf(e.Error())
http.Error(w,e.Error(),http.StatusBadRequest)
return
}
glog.Infof("webhook received audit list,len: %d",len(eventList.Items))
for _,event := range eventList.Items {
bEvent,_ := json.Marshal(event)
glog.Infof("Received event: %s",string(bEvent))
}
w.WriteHeader(http.StatusOK)
}
解决方法
暂无找到可以解决该程序问题的有效方法,小编努力寻找整理中!
如果你已经找到好的解决方法,欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@)