diff --git a/dnsapi/openstack.sh b/dnsapi/openstack.sh
new file mode 100755
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--- /dev/null
+++ b/dnsapi/openstack.sh
@@ -0,0 +1,348 @@
+#!/usr/bin/env sh
+
+# OpenStack Designate API plugin
+#
+# This requires you to have OpenStackClient and python-desginateclient
+# installed.
+#
+# You will require Keystone V3 credentials loaded into your environment, which
+# could be either password or v3applicationcredential type.
+#
+# Author: Andy Botting <andy@andybotting.com>
+
+########  Public functions #####################
+
+# Usage: dns_openstack_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_openstack_add() {
+  fulldomain=$1
+  txtvalue=$2
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  _dns_openstack_credentials || return $?
+  _dns_openstack_check_setup || return $?
+  _dns_openstack_find_zone || return $?
+  _dns_openstack_get_recordset || return $?
+  _debug _recordset_id "$_recordset_id"
+  if [ -n "$_recordset_id" ]; then
+    _dns_openstack_get_records || return $?
+    _debug _records "$_records"
+  fi
+  _dns_openstack_create_recordset || return $?
+}
+
+# Usage: dns_openstack_rm   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+# Remove the txt record after validation.
+dns_openstack_rm() {
+  fulldomain=$1
+  txtvalue=$2
+  _debug fulldomain "$fulldomain"
+  _debug txtvalue "$txtvalue"
+
+  _dns_openstack_credentials || return $?
+  _dns_openstack_check_setup || return $?
+  _dns_openstack_find_zone || return $?
+  _dns_openstack_get_recordset || return $?
+  _debug _recordset_id "$_recordset_id"
+  if [ -n "$_recordset_id" ]; then
+    _dns_openstack_get_records || return $?
+    _debug _records "$_records"
+  fi
+  _dns_openstack_delete_recordset || return $?
+}
+
+####################  Private functions below ##################################
+
+_dns_openstack_create_recordset() {
+
+  if [ -z "$_recordset_id" ]; then
+    _info "Creating a new recordset"
+    if ! _recordset_id=$(openstack recordset create -c id -f value --type TXT --record "$txtvalue" "$_zone_id" "$fulldomain."); then
+      _err "No recordset ID found after create"
+      return 1
+    fi
+  else
+    _info "Updating existing recordset"
+    # Build new list of --record <rec> args for update
+    _record_args="--record $txtvalue"
+    for _rec in $_records; do
+      _record_args="$_record_args --record $_rec"
+    done
+    # shellcheck disable=SC2086
+    if ! _recordset_id=$(openstack recordset set -c id -f value $_record_args "$_zone_id" "$fulldomain."); then
+      _err "Recordset update failed"
+      return 1
+    fi
+  fi
+
+  _max_retries=60
+  _sleep_sec=5
+  _retry_times=0
+  while [ "$_retry_times" -lt "$_max_retries" ]; do
+    _retry_times=$(_math "$_retry_times" + 1)
+    _debug3 _retry_times "$_retry_times"
+
+    _record_status=$(openstack recordset show -c status -f value "$_zone_id" "$_recordset_id")
+    _info "Recordset status is $_record_status"
+    if [ "$_record_status" = "ACTIVE" ]; then
+      return 0
+    elif [ "$_record_status" = "ERROR" ]; then
+      return 1
+    else
+      _sleep $_sleep_sec
+    fi
+  done
+
+  _err "Recordset failed to become ACTIVE"
+  return 1
+}
+
+_dns_openstack_delete_recordset() {
+
+  if [ "$_records" = "$txtvalue" ]; then
+    _info "Only one record found, deleting recordset"
+    if ! openstack recordset delete "$_zone_id" "$fulldomain." >/dev/null; then
+      _err "Failed to delete recordset"
+      return 1
+    fi
+  else
+    _info "Found existing records, updating recordset"
+    # Build new list of --record <rec> args for update
+    _record_args=""
+    for _rec in $_records; do
+      if [ "$_rec" = "$txtvalue" ]; then
+        continue
+      fi
+      _record_args="$_record_args --record $_rec"
+    done
+    # shellcheck disable=SC2086
+    if ! openstack recordset set -c id -f value $_record_args "$_zone_id" "$fulldomain." >/dev/null; then
+      _err "Recordset update failed"
+      return 1
+    fi
+  fi
+}
+
+_dns_openstack_get_root() {
+  # Take the full fqdn and strip away pieces until we get an exact zone name
+  # match. For example, _acme-challenge.something.domain.com might need to go
+  # into something.domain.com or domain.com
+  _zone_name=$1
+  _zone_list=$2
+  while [ "$_zone_name" != "" ]; do
+    _zone_name="$(echo "$_zone_name" | sed 's/[^.]*\.*//')"
+    echo "$_zone_list" | while read -r id name; do
+      if _startswith "$_zone_name." "$name"; then
+        echo "$id"
+      fi
+    done
+  done | _head_n 1
+}
+
+_dns_openstack_find_zone() {
+  if ! _zone_list="$(openstack zone list -c id -c name -f value)"; then
+    _err "Can't list zones. Check your OpenStack credentials"
+    return 1
+  fi
+  _debug _zone_list "$_zone_list"
+
+  if ! _zone_id="$(_dns_openstack_get_root "$fulldomain" "$_zone_list")"; then
+    _err "Can't find a matching zone. Check your OpenStack credentials"
+    return 1
+  fi
+  _debug _zone_id "$_zone_id"
+}
+
+_dns_openstack_get_records() {
+  if ! _records=$(openstack recordset show -c records -f value "$_zone_id" "$fulldomain."); then
+    _err "Failed to get records"
+    return 1
+  fi
+  return 0
+}
+
+_dns_openstack_get_recordset() {
+  if ! _recordset_id=$(openstack recordset list -c id -f value --name "$fulldomain." "$_zone_id"); then
+    _err "Failed to get recordset"
+    return 1
+  fi
+  return 0
+}
+
+_dns_openstack_check_setup() {
+  if ! _exists openstack; then
+    _err "OpenStack client not found"
+    return 1
+  fi
+}
+
+_dns_openstack_credentials() {
+  _debug "Check OpenStack credentials"
+
+  # If we have OS_AUTH_URL already set in the environment, then assume we want
+  # to use those, otherwise use stored credentials
+  if [ -n "$OS_AUTH_URL" ]; then
+    _debug "OS_AUTH_URL env var found, using environment"
+  else
+    _debug "OS_AUTH_URL not found, loading stored credentials"
+    OS_AUTH_URL="${OS_AUTH_URL:-$(_readaccountconf_mutable OS_AUTH_URL)}"
+    OS_IDENTITY_API_VERSION="${OS_IDENTITY_API_VERSION:-$(_readaccountconf_mutable OS_IDENTITY_API_VERSION)}"
+    OS_AUTH_TYPE="${OS_AUTH_TYPE:-$(_readaccountconf_mutable OS_AUTH_TYPE)}"
+    OS_APPLICATION_CREDENTIAL_ID="${OS_APPLICATION_CREDENTIAL_ID:-$(_readaccountconf_mutable OS_APPLICATION_CREDENTIAL_ID)}"
+    OS_APPLICATION_CREDENTIAL_SECRET="${OS_APPLICATION_CREDENTIAL_SECRET:-$(_readaccountconf_mutable OS_APPLICATION_CREDENTIAL_SECRET)}"
+    OS_USERNAME="${OS_USERNAME:-$(_readaccountconf_mutable OS_USERNAME)}"
+    OS_PASSWORD="${OS_PASSWORD:-$(_readaccountconf_mutable OS_PASSWORD)}"
+    OS_PROJECT_NAME="${OS_PROJECT_NAME:-$(_readaccountconf_mutable OS_PROJECT_NAME)}"
+    OS_PROJECT_ID="${OS_PROJECT_ID:-$(_readaccountconf_mutable OS_PROJECT_ID)}"
+    OS_USER_DOMAIN_NAME="${OS_USER_DOMAIN_NAME:-$(_readaccountconf_mutable OS_USER_DOMAIN_NAME)}"
+    OS_USER_DOMAIN_ID="${OS_USER_DOMAIN_ID:-$(_readaccountconf_mutable OS_USER_DOMAIN_ID)}"
+    OS_PROJECT_DOMAIN_NAME="${OS_PROJECT_DOMAIN_NAME:-$(_readaccountconf_mutable OS_PROJECT_DOMAIN_NAME)}"
+    OS_PROJECT_DOMAIN_ID="${OS_PROJECT_DOMAIN_ID:-$(_readaccountconf_mutable OS_PROJECT_DOMAIN_ID)}"
+  fi
+
+  # Check each var and either save or clear it depending on whether its set.
+  # The helps us clear out old vars in the case where a user may want
+  # to switch between password and app creds
+  _debug "OS_AUTH_URL" "$OS_AUTH_URL"
+  if [ -n "$OS_AUTH_URL" ]; then
+    export OS_AUTH_URL
+    _saveaccountconf_mutable OS_AUTH_URL "$OS_AUTH_URL"
+  else
+    unset OS_AUTH_URL
+    _clearaccountconf SAVED_OS_AUTH_URL
+  fi
+
+  _debug "OS_IDENTITY_API_VERSION" "$OS_IDENTITY_API_VERSION"
+  if [ -n "$OS_IDENTITY_API_VERSION" ]; then
+    export OS_IDENTITY_API_VERSION
+    _saveaccountconf_mutable OS_IDENTITY_API_VERSION "$OS_IDENTITY_API_VERSION"
+  else
+    unset OS_IDENTITY_API_VERSION
+    _clearaccountconf SAVED_OS_IDENTITY_API_VERSION
+  fi
+
+  _debug "OS_AUTH_TYPE" "$OS_AUTH_TYPE"
+  if [ -n "$OS_AUTH_TYPE" ]; then
+    export OS_AUTH_TYPE
+    _saveaccountconf_mutable OS_AUTH_TYPE "$OS_AUTH_TYPE"
+  else
+    unset OS_AUTH_TYPE
+    _clearaccountconf SAVED_OS_AUTH_TYPE
+  fi
+
+  _debug "OS_APPLICATION_CREDENTIAL_ID" "$OS_APPLICATION_CREDENTIAL_ID"
+  if [ -n "$OS_APPLICATION_CREDENTIAL_ID" ]; then
+    export OS_APPLICATION_CREDENTIAL_ID
+    _saveaccountconf_mutable OS_APPLICATION_CREDENTIAL_ID "$OS_APPLICATION_CREDENTIAL_ID"
+  else
+    unset OS_APPLICATION_CREDENTIAL_ID
+    _clearaccountconf SAVED_OS_APPLICATION_CREDENTIAL_ID
+  fi
+
+  _secure_debug "OS_APPLICATION_CREDENTIAL_SECRET" "$OS_APPLICATION_CREDENTIAL_SECRET"
+  if [ -n "$OS_APPLICATION_CREDENTIAL_SECRET" ]; then
+    export OS_APPLICATION_CREDENTIAL_SECRET
+    _saveaccountconf_mutable OS_APPLICATION_CREDENTIAL_SECRET "$OS_APPLICATION_CREDENTIAL_SECRET"
+  else
+    unset OS_APPLICATION_CREDENTIAL_SECRET
+    _clearaccountconf SAVED_OS_APPLICATION_CREDENTIAL_SECRET
+  fi
+
+  _debug "OS_USERNAME" "$OS_USERNAME"
+  if [ -n "$OS_USERNAME" ]; then
+    export OS_USERNAME
+    _saveaccountconf_mutable OS_USERNAME "$OS_USERNAME"
+  else
+    unset OS_USERNAME
+    _clearaccountconf SAVED_OS_USERNAME
+  fi
+
+  _secure_debug "OS_PASSWORD" "$OS_PASSWORD"
+  if [ -n "$OS_PASSWORD" ]; then
+    export OS_PASSWORD
+    _saveaccountconf_mutable OS_PASSWORD "$OS_PASSWORD"
+  else
+    unset OS_PASSWORD
+    _clearaccountconf SAVED_OS_PASSWORD
+  fi
+
+  _debug "OS_PROJECT_NAME" "$OS_PROJECT_NAME"
+  if [ -n "$OS_PROJECT_NAME" ]; then
+    export OS_PROJECT_NAME
+    _saveaccountconf_mutable OS_PROJECT_NAME "$OS_PROJECT_NAME"
+  else
+    unset OS_PROJECT_NAME
+    _clearaccountconf SAVED_OS_PROJECT_NAME
+  fi
+
+  _debug "OS_PROJECT_ID" "$OS_PROJECT_ID"
+  if [ -n "$OS_PROJECT_ID" ]; then
+    export OS_PROJECT_ID
+    _saveaccountconf_mutable OS_PROJECT_ID "$OS_PROJECT_ID"
+  else
+    unset OS_PROJECT_ID
+    _clearaccountconf SAVED_OS_PROJECT_ID
+  fi
+
+  _debug "OS_USER_DOMAIN_NAME" "$OS_USER_DOMAIN_NAME"
+  if [ -n "$OS_USER_DOMAIN_NAME" ]; then
+    export OS_USER_DOMAIN_NAME
+    _saveaccountconf_mutable OS_USER_DOMAIN_NAME "$OS_USER_DOMAIN_NAME"
+  else
+    unset OS_USER_DOMAIN_NAME
+    _clearaccountconf SAVED_OS_USER_DOMAIN_NAME
+  fi
+
+  _debug "OS_USER_DOMAIN_ID" "$OS_USER_DOMAIN_ID"
+  if [ -n "$OS_USER_DOMAIN_ID" ]; then
+    export OS_USER_DOMAIN_ID
+    _saveaccountconf_mutable OS_USER_DOMAIN_ID "$OS_USER_DOMAIN_ID"
+  else
+    unset OS_USER_DOMAIN_ID
+    _clearaccountconf SAVED_OS_USER_DOMAIN_ID
+  fi
+
+  _debug "OS_PROJECT_DOMAIN_NAME" "$OS_PROJECT_DOMAIN_NAME"
+  if [ -n "$OS_PROJECT_DOMAIN_NAME" ]; then
+    export OS_PROJECT_DOMAIN_NAME
+    _saveaccountconf_mutable OS_PROJECT_DOMAIN_NAME "$OS_PROJECT_DOMAIN_NAME"
+  else
+    unset OS_PROJECT_DOMAIN_NAME
+    _clearaccountconf SAVED_OS_PROJECT_DOMAIN_NAME
+  fi
+
+  _debug "OS_PROJECT_DOMAIN_ID" "$OS_PROJECT_DOMAIN_ID"
+  if [ -n "$OS_PROJECT_DOMAIN_ID" ]; then
+    export OS_PROJECT_DOMAIN_ID
+    _saveaccountconf_mutable OS_PROJECT_DOMAIN_ID "$OS_PROJECT_DOMAIN_ID"
+  else
+    unset OS_PROJECT_DOMAIN_ID
+    _clearaccountconf SAVED_OS_PROJECT_DOMAIN_ID
+  fi
+
+  if [ "$OS_AUTH_TYPE" = "v3applicationcredential" ]; then
+    # Application Credential auth
+    if [ -z "$OS_APPLICATION_CREDENTIAL_ID" ] || [ -z "$OS_APPLICATION_CREDENTIAL_SECRET" ]; then
+      _err "When using OpenStack application credentials, OS_APPLICATION_CREDENTIAL_ID"
+      _err "and OS_APPLICATION_CREDENTIAL_SECRET must be set."
+      _err "Please check your credentials and try again."
+      return 1
+    fi
+  else
+    # Password auth
+    if [ -z "$OS_USERNAME" ] || [ -z "$OS_PASSWORD" ]; then
+      _err "OpenStack username or password not found."
+      _err "Please check your credentials and try again."
+      return 1
+    fi
+
+    if [ -z "$OS_PROJECT_NAME" ] && [ -z "$OS_PROJECT_ID" ]; then
+      _err "When using password authentication, OS_PROJECT_NAME or"
+      _err "OS_PROJECT_ID must be set."
+      _err "Please check your credentials and try again."
+      return 1
+    fi
+  fi
+
+  return 0
+}