Helm chart: IPsec VPN server

Kubernetes Helm chart to run an IPsec VPN server, with IPsec/L2TP, Cisco IPsec and IKEv2. This is based on the docker image hwdsl2/docker-ipsec-vpn-server.

The main goal is to simplify the deployment of a VPN server for k8s. You will be able to configure VPN users directly as list in the values.yaml.

Configuration

The configuration of the VPN server will be set in the values.yaml-file. Please ensure to overwrite the configuration especially for vpn.psk, vpn.dns_name and users[*].password.

It is possible to commit the password to your git repository if you have a separate sealed-secret instance. You find detailed documentation in the section Using sealed-secrets.

Installation

To deploy the Helm chart first copy the values.yaml-file and customize your deployment. After it was modified you can deploy the chart with the following command.

$ helm repo add taskmedia https://helm.task.media
$ helm repo update

$ helm show values taskmedia/ipsec-vpn-server > ./my-values.yaml
$ vi ./my-values.yaml

$ helm upgrade --install vpn taskmedia/ipsec-vpn-server --values ./my-values.yaml

You can also use OCI Helm charts from ghcr.io:

$ helm upgrade --install vpn oci://ghcr.io/taskmedia/ipsec-vpn-server

Using sealed-secrets

To ensure your passwords can be committed to the repository (GitOps) without security issues you can use the integrated sealed-secrets approach. Enable it by setting sealed_secrets: true. The vpn.psk and users[*].password then have to be entered encrypted. To encrypt a value you need to use the public key of sealed-secrets. The best approach is to use the kubeseal binary:

$ echo -n "${secret}" | \
    kubeseal \
    --raw \
    --from-file=/dev/stdin \
    --controller-name "sealed-secrets" \
    --controller-namespace "sealed-secrets" \
    --name "vpn-vpnconfig" \
    --namespace "vpn" \

Ensure to use the correct name and namespace otherwise the Secret will not be created by sealed-secrets. As name you have to specify the name of the generated secret. Typically this is your fullnameOverride with suffix -vpnconfig. Also specify the namespace where the VPN server will be deployed to.

Example

users:
  - username: vpn
    password: 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