cloudflare

README

Cloudflare module for Caddy

This package contains a DNS provider module for Caddy. It can be used to manage DNS records with Cloudflare accounts.

Caddy module name

dns.providers.cloudflare

Configuration

This module gives the user two ways of configuring API tokens.

1. Separate Zone and DNS Tokens (Deprecated)
   • Zone Token: Zone.Zone:Read permission for the domain(s) you're managing with Caddy
   • DNS Token: Zone.DNS:Edit permission for the domain(s) you're managing with Caddy
2. Single API Token (Recommended)
   • API Token: Zone.Zone:Read and Zone.DNS:Edit permissions for the domain(s) you're managing with Caddy

Note: Deprecated separate tokens support is only there for backward compatibility and might be removed in a future version of this module.

JSON Example

To use this module for the ACME DNS challenge, configure the ACME issuer in your Caddy JSON like so:

{
	"module": "acme",
	"challenges": {
		"dns": {
			"provider": {
				"name": "cloudflare",
				"api_token": "{env.CF_API_TOKEN}"
			}
		}
	}
}

Caddyfile Examples

Dual-key approach

tls {
	dns cloudflare {
		zone_token {env.CF_ZONE_TOKEN}
		api_token {env.CF_API_TOKEN}
	}
}

Single-key approach

tls {
	dns cloudflare {env.CF_API_TOKEN}
}

You can replace the {env.CF_*} placeholders with the actual auth token if you prefer to put it directly in your config instead of an environment variable, however it is less secure.

Authenticating

See the associated README in the libdns package for important information about credentials.

NOTE: If migrating from Caddy v1, you will need to change from using a Cloudflare API Key to a scoped API Token. Please see link above for more information.

Troubleshooting

Error: Invalid request headers

If providing your API token via an ENV var which is accidentally not set/available when running Caddy, you'll receive this error from Cloudflare.

Double check that Caddy has access to a valid CF API token.

Error: timed out waiting for record to fully propagate

Some environments may have trouble querying the _acme-challenge TXT record from Cloudflare. Verify in the Cloudflare dashboard that the temporary record is being created.

If the record does exist, your DNS resolver may be caching an earlier response before the record is valid. You can instead configure Caddy to use an alternative DNS resolver such as Cloudflare's official 1.1.1.1.

Add a custom resolver to the tls directive:

tls {
  dns cloudflare {env.CF_API_TOKEN}
  resolvers 1.1.1.1
}

Or with Caddy JSON to the acme module: challenges.dns.provider.resolvers: ["1.1.1.1"].

Error: expected 1 zone, got 0 for ...

In order for the DNS challenge to succeed, your domain must be resolved by a public DNS server. For instance, if your domain happens to be defined in /etc/hosts, or being resolved by a local DNS server, the challenge will fail with this error.

The issue can be fixed either by changing the DNS configuration of the system running Caddy, or by adding a custom resolver to the tls directive:

tls {
  dns cloudflare {env.CF_API_TOKEN}
  resolvers 1.1.1.1
}

Documentation

Index

• type Provider
  • func (Provider) CaddyModule() caddy.ModuleInfo
  • func (p *Provider) Provision(ctx caddy.Context) error
  • func (p *Provider) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

Types

type Provider

type Provider struct{ *cloudflare.Provider }

Provider wraps the provider implementation as a Caddy module.

func (Provider) CaddyModule

func (Provider) CaddyModule() caddy.ModuleInfo

CaddyModule returns the Caddy module information.

func (*Provider) Provision

func (p *Provider) Provision(ctx caddy.Context) error

Before using the provider config, resolve placeholders in the API token(s). Implements caddy.Provisioner.

func (*Provider) UnmarshalCaddyfile

func (p *Provider) UnmarshalCaddyfile(d *caddyfile.Dispenser) error

UnmarshalCaddyfile sets up the DNS provider from Caddyfile tokens. Three syntaxes supported:

Seperate Zone/DNS tokens

cloudflare {
  api_token <api_token>     // Zone DNS write access - scoped to applicable Zone(s)
  zone_token <zone_token>   // Zone read access - all zones
}

Single API Token

cloudflare <api_token>      // Zone read access and Zone DNS write for all zones

Single API Token, alternative syntax

cloudflare {
  api_token <api_token>     // Zone read access and Zone DNS write for all zones
}

Expansion of placeholders in the API token is left to the JSON config caddy.Provisioner (above).