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https://github.com/terassyi/lb-inter-node-exporter
https://github.com/terassyi/lb-inter-node-exporter
Last synced: 3 days ago
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- Host: GitHub
- URL: https://github.com/terassyi/lb-inter-node-exporter
- Owner: terassyi
- License: mit
- Created: 2024-04-21T04:43:56.000Z (7 months ago)
- Default Branch: main
- Last Pushed: 2024-04-21T08:01:28.000Z (7 months ago)
- Last Synced: 2024-04-22T05:47:18.537Z (7 months ago)
- Language: Rust
- Size: 22.5 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# lb-inter-node-exporter
`lb-inter-node-exporter` is the exporter to trace the intermediate node of Kubernetes LoadBalancer service with `externalTrafficPolicy=Cluster`.
This only supports Ipv4 now.
This project is `Rust` and [aya-rs](https://github.com/aya-rs/aya).
## Build
To build `lb-inter-node-exporter`, we need Rust and its toolchain.
Please run following commands.
```console
$ make setup
$ make build
```
## Quick start
We can try with kind.
1. Run following commands
```console
$ make start # start kind and containerlab
$ make metallb # deploy metallb
$ make apply # deploy lb-inter-node-exporter
$ make lb # deploy sample workloads
```
After preparing the environment, we may have to wait a few minute establishing the connectivity via LoadBalancer.
2. Check the connectivity with sample workloads via LoadBalancer
```console
$ kubectl -n test get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
app-svc-cluster LoadBalancer 10.101.85.137 10.0.10.0 80:32554/TCP 3s
app-svc-cluster2 LoadBalancer 10.101.180.159 10.0.10.1 80:31924/TCP 3s
app-svc-local LoadBalancer 10.101.241.182 10.0.10.2 80:31789/TCP 3s
$ docker exec -it clab-lb-inter-node-exporter-client0 curl http://10.0.10.0
{"timestamp":"2024-04-21T07:35:35.221203969Z","from":"10.100.1.2","to":"172.18.0.4:21172"}%
```
3. Check the log and metrics
```console
stern -n kube-system ds/lb-inter-node-exporter
+ lb-inter-node-exporter-89s6p › lb-inter-node-exporter
+ lb-inter-node-exporter-hssv6 › lb-inter-node-exporter
+ lb-inter-node-exporter-htszd › lb-inter-node-exporter
+ lb-inter-node-exporter-ncv7t › lb-inter-node-exporter
...(snip)...
lb-inter-node-exporter-89s6p lb-inter-node-exporter {"timestamp":"2024-04-21T07:35:35.221020Z","level":"INFO","fields":{"message":"Received by intermediate node","src_addr":"2.0.168.192","dst_addr":"10.0.10.0","src_port":60618,"dst_port":80},"target":"lb_inter_node_exporter"}
...(snip)...
```
```console
docker exec -it lb-inter-node-exporter-worker2 curl localhost:8080/metrics
# HELP lb_inter_node_exporter_picked_total The count of picked as the intermediate node
# TYPE lb_inter_node_exporter_picked_total counter
lb_inter_node_exporter_picked_total{dst="10.0.10.0",src="192.168.0.2"} 2
```
4. Clean up the test environment
```console
$ make stop
```