ExternalDNS Plugin CoreDNS Webhook

Commandline

usage: external-dns-coredns-webhook [<flags>]

ExternalDNS CoreDNS webhook

Flags:
  --help                     Show context-sensitive help (also try --help-long and --help-man).
  --version                  Show application version.
  --dry-run                  When enabled, prints DNS record changes rather than actually performing them (default: disabled)
  --log-format=text          The format in which log messages are printed (default: text, options: text, json)
  --log-level=info           Set the level of logging. (default: info, options: panic, debug, info, warning, error, fatal
  --webhook-provider-read-timeout=5s  
                             The read timeout for the webhook provider in duration format (default: 5s)
  --webhook-provider-write-timeout=5s  
                             The write timeout for the webhook provider in duration format (default: 5s)
  --webhook-provider-port="0.0.0.0:8888"  
                             Webhook provider port (default: 0.0.0.0:8888)
  --prefix="/skydns/"        Specify the prefix name
  --managed-by=""            Only allow checking of services created by the same manager (default: "")
  --ignore-empty-managed-by  If the 'managed-by' field is set, this prevents the takeover of services without a 'managed-by' value (default: disabled)

ENVs for Etcd

Name	Description	Default
ETCD_URLS	Optionally, can be used to configure the urls to connect to etcd, comma seperated.	"http://localhost:2379"
ETCD_USERNAME	Optionally, can be used to configure for authenticating to etcd.	""
ETCD_PASSWORD	Optionally, can be used to configure for authenticating to etcd.	""
ETCD_CA_FILE	Optionally, can be used to configure TLS settings for etcd.	""
ETCD_CERT_FILE	Optionally, can be used to configure TLS settings for etcd.	""
ETCD_KEY_FILE	Optionally, can be used to configure TLS settings for etcd.	""
ETCD_TLS_SERVER_NAME	Optionally, can be used to configure TLS settings for etcd.	""
ETCD_TLS_INSECURE	Optionally, To insecure handle connection use "true", default is false.	""

Pre-filtering CoreDNS services based on managed by field

If you are running external-dns in multi cluster, you can use --managed-by to filter externally created services, for example from a different external-dns.

Custom attributes

Coredns offers currently a single custom attribute:

• Grouped records: external-dns.alpha.kubernetes.io/webhook-coredns-group