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wireguard-chart

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A helm chart for wireguard

wireguard-chart 최신버젼 다운로드

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// repository documentation

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# Wireguard Chart
A simple chart that can be used to run wireguard inside of a Kubernetes cluster.

## Add the helm repo
To add this helm repo, run `helm repo add wireguard https://bryopsida.github.io/wireguard-chart` followed by a `helm repo update` to fetch the contents.

## Deploy
To deploy with defaults and use the automatically generated private key you can use `helm upgrade --install wg-vpn-1 wireguard/wireguard --namespace <your namespace>`.
This will create a load balancer service exposing UDP port `51820`, to run multiple wireguard releases you will need to change the service port to avoid collisions, 
you can find the helm values documentation [here](helm/wireguard/README.md). By default no client configurations are added. The default CIDR for the VPN network is `10.34.0.1/24`

## Maintain client configurations
Follow the wireguard [documentation](https://www.wireguard.com/quickstart/) for generating keys and determining client IPs. Clients can be set by providing the following yaml override values.

``` yaml
wireguard:
  clients:
    - PublicKey: <your client public key here>
      AllowedIPs: 10.34.0.2/32
```

And feeding it into helm `helm upgrade --install wg-vpn-1 wireguard/wireguard --namespace <your namespace> -f <path-to-your-overides>`

## Example Tunnel Configuration(s)
### Route all traffic and use kube-dns

If you want to route all traffic through WireGuard and use the cluster dns to allow service discovery, you can use the following tunnel configuration.

Release values

``` yaml
service:
  port: 51225
wireguard:
  allowWan: false
  clients:
  - AllowedIPs: 172.32.32.3/32
    PresharedKey: <redacted>
    PublicKey: <redacted>
  - AllowedIPs: 172.32.32.2/32
    PresharedKey: <redacted>
    PublicKey: <redacted>
  serverAddress: 172.32.32.1/24
  serverCidr: 172.32.32.0/24
```

Where kube-dns service ip address is `10.43.0.10`.

``` ini
[Interface]
PrivateKey = <redacted>
Address = 172.32.32.2/32
DNS = 10.43.0.10

[Peer]
PublicKey = <redacted>
PresharedKey = <redacted>
AllowedIPs = 0.0.0.0/0
Endpoint = <host>:<ip> of wireguard endpoint
```

How you can test it works:

1) Pick a internal K8S service. I'm going to use a couchdb service as an example.
2) Dig it as shown below
3) You should see that the kube-dns server answers it and you should be able to resolve A records

``` shell
dig couchdb-couchdb.couchdb.svc.cluster.local

; <<>> DiG 9.10.6 <<>> couchdb-couchdb.couchdb.svc.cluster.local
;; global options: +cmd
;; Got answer:
;; WARNING: .local is reserved for Multicast DNS
;; You are currently testing what happens when an mDNS query is leaked to DNS
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65023
;; flags: qr aa rd; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;couchdb-couchdb.couchdb.svc.cluster.local. IN A

;; ANSWER SECTION:
couchdb-couchdb.couchdb.svc.cluster.local. 5 IN	A <redacted>
couchdb-couchdb.couchdb.svc.cluster.local. 5 IN	A <redacted>
couchdb-couchdb.couchdb.svc.cluster.local. 5 IN	A <redacted>
couchdb-couchdb.couchdb.svc.cluster.local. 5 IN	A <redacted>
couchdb-couchdb.couchdb.svc.cluster.local. 5 IN	A <redacted>
couchdb-couchdb.couchdb.svc.cluster.local. 5 IN	A <redacted>

;; Query time: 51 msec
;; SERVER: 10.43.0.10#53(10.43.0.10)
;; WHEN: Sun Apr 02 15:04:51 CDT 2023
;; MSG SIZE  rcvd: 41
```

If you are using something like cilium and have access to hubble you can verify the network flows there as well.

## Prometheus Metrics

```yaml
metrics:
  enabled: true
```

- Adds another container with [prometheus_wireguard_exporter](https://github.com/MindFlavor/prometheus_wireguard_exporter)
- Installs a Prometheus ServiceMonitor to scrape metrics from the wireguard server
- Deploys a Grafana dashboard:
  ![Grafana Dashboard](https://raw.githubusercontent.com/bryopsida/wireguard-chart/main/dashboard-screenshot.png)

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