Linode

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Linode CLI

Installing the linode CLI:

pip3 install linode-cli
linode-cli configure --token
linode-cli --json --pretty domains list

Linode DNS servers

Example Perl code using LWP to update an A record $HOST.$DOMAIN to $IP:

# Set up a user agent with our token as default header
$ua = LWP::UserAgent->new();
$ua->default_header(
	'Content-Type'  => "application/json",
	'Authorization' => "Bearer $API_KEY"
);

# Find the ID for $DOMAIN
$domains = $ua->get( 'https://api.linode.com/v4/domains' )->content;
for ( @{ decode_json( $domains )->{data} } ) {
	$domain_id = $_->{id} if $_->{domain} eq $DOMAIN;
}

# Find the ID of the A record having the name $HOST
$records = $ua->get( "https://api.linode.com/v4/domains/$domain_id/records" )->content;
for ( @{ decode_json( $records )->{data} } ) {
	$record_id = $_->{id} if $_->{name} eq $HOST;
}

# Update the A record to $IP
$ua->put(
	"https://api.linode.com/v4/domains/$domain_id/records/$record_id",
	'Content' => encode_json({ 'target' => $IP })
);

Gotchas

• For some reason the "@" host is not allowed in the TXT record form, you have to use the naked domain in the host field which ends up as "@" in the zone file