Added support for Linode DNS API.

README.md

@@ -266,6 +266,7 @@ You don't have to do anything manually!
 1. aliyun.com(阿里云) API
 1. ISPConfig 3.1 API
 1. Alwaysdata.com API
+1. Linode.com API
 
 **More APIs coming soon...**
 

dnsapi/README.md

@@ -257,6 +257,25 @@ acme.sh --issue --dns dns_ad -d example.com -d www.example.com
 The `AD_API_KEY` will be saved in `~/.acme.sh/account.conf` and will be reused
 when needed.
 
+## 14. Use Linode domain API
+
+You will need to install the Linode CLI and set it up accordingly.
+
+[https://www.linode.com/docs/platform/linode-cli](https://www.linode.com/docs/platform/linode-cli)
+
+Follow the installation instructions appropriate for your platform and then run the configuration.
+
+```linode configure
+```
+
+Make sure Linode CLI is working correctly before proceeding.
+
+Due to the reload time of any changes in the DNS records, we have to use the `dnssleep` option to wait at least 15 minutes for the changes to take effect.
+
+```sh
+acme.sh --issue --dns dns_linode --dnssleep 900 -d example.com -d www.example.com
+```
+
 # Use custom API
 
 If your API is not supported yet, you can write your own DNS API.

dnsapi/dns_linode.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+linode_cmd="/usr/bin/linode"
+
+########  Public functions #####################
+
+#Usage: dns_linode_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_linode_add() {
+  fulldomain="${1}"
+  txtvalue="${2}"
+
+  _info "Using Linode"
+  _debug "Calling: dns_linode_add() '${fulldomain}' '${txtvalue}'"
+
+  domain=$(printf "%s" "${fulldomain}" | cut -d . -f 3-999)
+  name=$(printf "%s" "${fulldomain}" | cut -d . -f 1-2)
+  _debug name "${name}"
+  _debug domain "${domain}"
+
+  _Linode_CLI && _Linode_addTXT
+}
+
+#Usage: dns_linode_rm   _acme-challenge.www.domain.com
+dns_linode_rm() {
+  fulldomain="${1}"
+
+  _info "Using Linode"
+  _debug "Calling: dns_linode_rm() '${fulldomain}'"
+
+  domain=$(printf "%s" "${fulldomain}" | cut -d . -f 3-999)
+  name=$(printf "%s" "${fulldomain}" | cut -d . -f 1-2)
+  _debug name "${name}"
+  _debug domain "${domain}"
+
+  _Linode_CLI && _Linode_rmTXT
+}
+
+####################  Private functions below ##################################
+
+_Linode_CLI() {
+  if [ ! -f "${linode_cmd}" ]; then
+    _err "Please install the Linode CLI package and set it up accordingly before using this DNS API."
+    return 1
+  fi
+}
+
+_Linode_addTXT() {
+  _debug "$linode_cmd domain record-update ${domain} TXT ${name} --target ${txtvalue}"
+  $linode_cmd domain record-update ${domain} TXT ${name} --target ${txtvalue}
+
+  if [ $? -ne 0 ]; then
+    _debug "$linode_cmd domain record-create ${domain} TXT ${name} ${txtvalue}"
+    $linode_cmd domain record-create ${domain} TXT ${name} ${txtvalue}
+  fi
+}
+
+_Linode_rmTXT() {
+  _debug "$linode_cmd domain record-delete ${domain} TXT ${name}"
+  $linode_cmd domain record-delete ${domain} TXT ${name}
+}