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80 lines
2.5 KiB
Markdown
80 lines
2.5 KiB
Markdown
# DNS
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Headscale supports [most DNS features](../about/features.md) from Tailscale and DNS releated settings can be configured
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in the [configuration file](./configuration.md) within the `dns` section.
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## Setting custom DNS records
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!!! warning "Community documentation"
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This page is not actively maintained by the headscale authors and is
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written by community members. It is _not_ verified by headscale developers.
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**It might be outdated and it might miss necessary steps**.
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Headscale allows to set custom DNS records which are made available via
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[MagicDNS](https://tailscale.com/kb/1081/magicdns). An example use case is to serve multiple apps on the same host via a
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reverse proxy like NGINX, in this case a Prometheus monitoring stack. This allows to nicely access the service with
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"http://grafana.myvpn.example.com" instead of the hostname and port combination
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"http://hostname-in-magic-dns.myvpn.example.com:3000".
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!!! warning "Limitations"
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[Not all types of records are supported](https://github.com/tailscale/tailscale/blob/6edf357b96b28ee1be659a70232c0135b2ffedfd/ipn/ipnlocal/local.go#L2989-L3007), especially no CNAME records.
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1. Update the [configuration file](./configuration.md) to contain the desired records like so:
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```yaml
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dns:
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...
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extra_records:
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- name: "prometheus.myvpn.example.com"
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type: "A"
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value: "100.64.0.3"
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- name: "grafana.myvpn.example.com"
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type: "A"
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value: "100.64.0.3"
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...
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```
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1. Restart your headscale instance.
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1. Verify that DNS records are properly set using the DNS querying tool of your choice:
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=== "Query with dig"
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```shell
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dig +short grafana.myvpn.example.com
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100.64.0.3
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```
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=== "Query with drill"
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```shell
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drill -Q grafana.myvpn.example.com
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100.64.0.3
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```
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1. Optional: Setup the reverse proxy
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The motivating example here was to be able to access internal monitoring services on the same host without
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specifying a port, depicted as NGINX configuration snippet:
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```
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server {
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listen 80;
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listen [::]:80;
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server_name grafana.myvpn.example.com;
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location / {
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proxy_pass http://localhost:3000;
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proxy_set_header Host $http_host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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}
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}
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```
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