eCapture in container环境里抓包
案例详情介绍
使用流程介绍
查看docker容器列表，找到你关注的容器
docker ps | grep -w netshoot
b37ffd7a8341 nicolaka/netshoot "/bin/sleep 3600" 50 minutes ago Up 50 minutes
确认docker ID
docker inspect b37ffd7a8341 | grep '"MergedDir"'
"MergedDir": "/var/lib/docker/overlay2/02c5fe50b9c6a817c47117ebddd8be82cf4095a6ff278f197519b1cedb7c3d75/merged",
查找libssl
find /var/lib/docker/overlay2/02c5fe50b9c6a817c47117ebddd8be82cf4095a6ff278f197519b1cedb7c3d75/merged -name "libssl*"
/var/lib/docker/overlay2/02c5fe50b9c6a817c47117ebddd8be82cf4095a6ff278f197519b1cedb7c3d75/merged/lib/libssl.so.1.1
/var/lib/docker/overlay2/02c5fe50b9c6a817c47117ebddd8be82cf4095a6ff278f197519b1cedb7c3d75/merged/usr/lib/libssl.so.1.1
使用eCapture捕获
ecapture tls --libssl="/var/lib/docker/overlay2/02c5fe50b9c6a817c47117ebddd8be82cf4095a6ff278f197519b1cedb7c3d75/merged/lib/libssl.so.1.1" --hex
2022/05/30 14:02:27 pid info :2825032
2022/05/30 14:02:27 start to run EBPFProbeOPENSSL module
2022/05/30 14:02:27 start to run EBPFProbeGNUTLS module
2022/05/30 14:02:27 HOOK type:2, binrayPath:/var/lib/docker/overlay2/02c5fe50b9c6a817c47117ebddd8be82cf4095a6ff278f197519b1cedb7c3d75/merged/lib/libssl.so.1.1
2022/05/30 14:02:27 libPthread so Path:/lib64/libpthread.so.0
2022/05/30 14:02:27 target all process.
2022/05/30 14:02:27 start to run EBPFProbeNSPR module
2022/05/30 14:02:27 stat /usr/lib/libnspr4.so: no such file or directory
2022/05/30 14:02:27 HOOK type:2, binrayPath:/lib64/libgnutls.so.30
2022/05/30 14:02:27 target all process.
结果输出
2022/05/30 14:03:34 PID:2825502, Comm:curl, TID:2825502, Version:TLS1_2_VERSION, Send 74 bytes to [ADDR_NOT_FOUND], Payload:
GET / HTTP/1.1
Host: 10.1.34.88
User-Agent: curl/7.83.1
Accept: */*
2022/05/30 14:03:34 PID:2825502, Comm:curl, TID:2825502, Version:TLS1_2_VERSION, Recived 88 bytes from [ADDR_NOT_FOUND], Payload:
HTTP/1.0 200 OK
Server: BigIP
Connection: Keep-Alive
Content-Length: 10
IT WORKS
演示视频
在k8s 环境里，可能需要对k8s node的进程，或同一k8s node上其他的container进行 抓包来满足运维的需要，下面视频链接演示具体的抓包过程.