From faf2e2bc8e571777409e2a596850ea7783537123 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <francois@kaz.bzh>
Date: Sun, 20 Apr 2025 10:51:20 +0200
Subject: [PATCH] add dyn DNS

---
 bin/dynDNS.sh | 176 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 176 insertions(+)
 create mode 100755 bin/dynDNS.sh

diff --git a/bin/dynDNS.sh b/bin/dynDNS.sh
new file mode 100755
index 0000000..356bcd6
--- /dev/null
+++ b/bin/dynDNS.sh
@@ -0,0 +1,176 @@
+#!/bin/bash
+
+# nohup /kaz/bin/dynDNS.sh &
+
+KAZ_ROOT=$(cd "$(dirname $0)"/..; pwd)
+. "${KAZ_ROOT}/bin/.commonFunctions.sh"
+setKazVars
+. "${DOCKERS_ENV}"
+# no more export in .env
+export $(set | grep "domain=")
+
+cd "${KAZ_ROOT}"
+export PRG="$0"
+
+export MYHOST="${site}"
+
+MYIP_URL="https://kaz.bzh/myip.php"
+DNS_IP=""
+
+DELAI_WAIT=10 # DNS occupé
+DELAI_GET=5 # min entre 2 requêtes
+DELAI_CHANGE=3600 # propagation 1h
+DELAI_NO_CHANGE=300 # pas de changement 5 min
+
+BOLD='\e[1m'
+RED='\e[0;31m'
+GREEN='\e[0;32m'
+YELLOW='\e[0;33m'
+BLUE='\e[0;34m'
+MAGENTA='\e[0;35m'
+CYAN='\e[0;36m'
+NC='\e[0m' # No Color
+NL='
+'
+
+export VERBOSE=""
+export SIMU=""
+
+usage(){
+    echo "Usage: ${PRG} list [sub-domain...]"
+    echo "  -h help"
+    echo "  -v verbose"
+    echo "  -n simulation"
+    exit 1
+}
+
+#. "${KAZ_KEY_DIR}/env-gandi"
+. "${KAZ_KEY_DIR}/env-alwaysdata"
+ 
+if [[ -z "${ALWAYSDATA_TOKEN}" ]] ; then
+    echo "no ALWAYSDATA_TOKEN set in ${KAZ_KEY_DIR}/env-alwaysdata"
+    usage
+fi
+
+DOMAIN_ID=$(curl -s -X GET --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" ${ALWAYSDATA_API}/domain/?name=${domain} | jq '.[0].id')
+
+if [[ -z "${DOMAIN_ID}" ]] ; then
+    echo "no DOMAIN_ID give by alwaysdata"
+    usage
+fi
+
+# if [[ -z "${GANDI_KEY}" ]] ; then
+#     echo
+#     echo "no GANDI_KEY set in ${KAZ_KEY_DIR}/env-gandi"
+#     usage
+#     exit
+# fi
+
+for ARG in $@
+do
+    case "${ARG}" in
+	'-h' | '-help' )
+	    usage
+	    ;;
+	'-v' )
+	    shift
+	    export VERBOSE=":"
+	    ;;
+	'-n' )
+	    shift
+	    export SIMU="echo"
+	    ;;
+	* )
+	    usage
+	    ;;
+    esac
+done
+
+log () {
+    echo -e "${BLUE}$(date +%d-%m-%Y-%H-%M-%S)${NC} : $*"
+}
+
+simu () {
+    echo -e "${YELLOW}$(date +%d-%m-%Y-%H-%M-%S)${NC} : $*"
+}
+
+cmdWait () {
+    #ex gandi
+    #curl -H "authorization: Apikey ${GANDI_KEY}" --connect-timeout 2 -s -D - -o /dev/null "${GANDI_API}" 2>/dev/null
+    curl -s -X GET --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" --connect-timeout 2 -D - -o /dev/null "${ALWAYSDATA_API}/record/?domain=${DOMAIN_ID}&type=CNAME&name=${TARGET}" 2>/dev/null
+}
+
+waitNet () {
+    ###  wait when error code 503
+    if [[ $(cmdWait | head -n1) != *200* ]]; then
+	log "DNS not available. Please wait..."
+	while [[ $(cmdWait | head -n1) != *200* ]]; do
+	    [[ -z "${VERBOSE}" ]] || simu curl -s -X GET --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" --connect-timeout 2 -D - -o /dev/null "${ALWAYSDATA_API}/record/?domain=${DOMAIN_ID}&type=CNAME&name=${TARGET}"
+	    sleep "${DELAI_WAIT}"
+	done
+	exit
+    fi
+}
+
+
+getDNS () {
+    # curl -s -X GET "${GANDI_API}/records" -H "authorization: Apikey ${GANDI_KEY}"|
+    #     sed "s/,{/\n/g"|
+    #     sed 's/.*rrset_name":"\([^"]*\)".*rrset_values":\["\([^"]*\)".*/\1:\2/g'|
+    #     grep -e "^${MYHOST}:"|
+    #     sed "s/^${MYHOST}://g" |
+    # 	tr -d '\n\t\r '
+    ${SIMU} curl -s -X GET --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" "${ALWAYSDATA_API}/record/?domain=${DOMAIN_ID}&type=A&name=${MYHOST}" | jq '.[] | "\(.value)"' | tr -d '"'
+}
+
+saveDns () {
+  mkdir -p /root/dns
+  ${SIMU} curl -s -X GET --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" "${ALWAYSDATA_API}/record/?domain=${DOMAIN_ID}" -o /root/dns/dns_save_$(date +'%Y%m%d%H%M%S')
+}
+
+setDNS () {
+    saveDns
+    # curl -s -X POST "${GANDI_API}/records" -H "authorization: Apikey  ${GANDI_KEY}" -H 'content-type: application/json' -d '{"rrset_type":"A", "rrset_name":"'${MYHOST}'", "rrset_values":["'${IP}'"]}'
+    ${SIMU} curl -s -X POST -d "{\"domain\":\"${DOMAIN_ID}\", \"type\":\"A\", \"name\":\"${MYHOST}\", \"value\":\"${IP}\"}" --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" "${ALWAYSDATA_API}/record/"
+
+}
+
+while :; do
+    sleep "${DELAI_GET}"
+    IP=$(curl -s "${MYIP_URL}" | grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' | tr -d '\n\t\r ')
+    if ! [[ ${IP} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+	log "BAB IP ${IP}" ; continue
+    fi
+
+    if [ -z "${DNS_IP}" ]; then
+	# Variable pas encore initialisée
+	waitNet
+	DNS_IP=$(getDNS)
+
+	if [ -z "${DNS_IP}" ]; then
+	    # C'est la première fois que le site est en prod
+	    log "set ${MYHOST} : ${IP}"
+	    setDNS
+	    DNS_IP=$(getDNS)
+	    log "DNS set ${MYHOST}:${IP} (=${DNS_IP})"
+	    sleep "${DELAI_CHANGE}"
+	    continue
+	fi
+    fi
+
+    if [ "${DNS_IP}" != "${IP}" ]; then
+	log "${MYHOST} : ${DNS_IP} must change to ${IP}"
+	# Changement d'adresse
+	waitNet
+	#curl -s -X DELETE "${GANDI_API}/records/${MYHOST}" -H "authorization: Apikey ${GANDI_KEY}"
+	RECORD_ID=$(curl -s -X GET --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" "${ALWAYSDATA_API}/record/?name=${MYHOST}&type=A&domain=${DOMAIN_ID}" | jq ".[] | select(.name==\"${MYHOST}\").id")
+	${SIMU} curl -s -X DELETE --basic --user "${ALWAYSDATA_TOKEN} account=${ALWAYSDATA_ACCOUNT}:" "${ALWAYSDATA_API}/record/${RECORD_ID}/"
+	setDNS
+	DNS_IP=$(getDNS)
+	log "DNS reset ${MYHOST}:${IP} (=${DNS_IP})"
+	sleep "${DELAI_CHANGE}"
+    else
+	log "OK ${MYHOST}:${DNS_IP} / ${IP}"
+	sleep ${DELAI_NO_CHANGE}
+    fi
+done