Add routes and make ARP/NDP permanent when a VM is moved to a proxmox node
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#!/bin/sh
# Script ajout de routes VM
# A CONFIGURER/VERIFIER :
# - USER_IPAM
# - PASSWORD_IPAM
# - ID_RANGES_V4
# - ID_RANGES_V6
# - LOG_PLACE
# - CHEMIN_CACHE
write_log() {
# $1: log level (INFO, ERROR, etc.)
# $2: message
printf "$(date -Isecond) - $1: $2\n" >> \
${LOG_PLACE}/$(date -Idate)_vm_routing.log
if [ $1 = 'ERROR' ] || [ $1 = 'FATAL' ] || [ $1 = 'WARN' ]; then
printf "$1: $2\n"
fi
}
# IPAM creds
if [ -f ./creds ]; then
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. ./creds
CURL='curl -s -k -sS'
else
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write_log FATAL 'The file creds doesn’t exist'
exit 1
fi
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# check for commands in the path
for bin in curl ip ipv6calc jq; do
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if [ -z $(which ${bin} 2>/dev/null) ]; then
MISSING="${MISSING} ${bin}"
fi
done
if [ ! -z "${MISSING}" ]; then
printf "You’r missing this:${MISSING}\n"
exit 1
fi
# Chemin fichier de LOG (et création du répertoire s'il n'existe pas)
LOG_PLACE='./vm_id_log/'
if [ ! -d "${LOG_PLACE}" ];then
mkdir -p ${LOG_PLACE}
write_log INFO 'Creation of the log dir'
fi
write_log INFO 'Beginning of the script execution'
# Chemin fichier de CACHE (et création du répertoire s'il n'existe pas)
CHEMIN_CACHE='./vm_id_cache/'
if [ ! -d "${CHEMIN_CACHE}" ];then
mkdir -p ${CHEMIN_CACHE}
write_log INFO 'Creation of the cache dir'
fi
# Fonction d'aide
usage() {
printf "Usage: ./creationRoutesVM.sh <VM_ID>\n"
printf "VM_ID est l'id d'une VM dans PROXMOX, un entier supérieur à zéro\n"
printf "option : \t-h, --help Affiche ce message d’aide\n"
}
# On vérifie la bonne présence d'un paramètre VM_ID
if [ $1 ]; then
if [ $1 = '-h' ] || [ $1 = '--help' ]; then
usage
exit 0
elif [ $# -lt 1 ]; then
write_log FATAL 'VM ID not specified'
usage
exit 1
else
# Verification of the VM ID
expr $1 + 0 1>/dev/null 2>&1
if [ $? -lt 2 ] && [ $1 -gt 0 ]; then
VM_ID=$1
else
write_log FATAL 'The VM ID must a non-null integer'
exit 1
fi
fi
else
write_log FATAL 'No parameter specified'
usage
exit 1
fi
# Récupération d'un TOKEN pour utiliser IPAM via l'API
write_log DEBUG 'Connecting to API'
RES_AUTHENT=$(${CURL} -X POST --user ${USER_IPAM}:${PASSWORD_IPAM} ${URL}/user/)
CODE_RETOUR_RES_AUTHENT=$(echo ${RES_AUTHENT} | jq '.code')
# Si OK, on utilise l'IPAM, sinon on passe par le fichier de cache
if [ ${CODE_RETOUR_RES_AUTHENT} != 200 ]; then
write_log ERROR "Wrong HTTP code from the API: ${CODE_RETOUR_RES_AUTHENT}"
write_log INFO "Using cache instead"
else
FEED_CACHE=1
fi
# Mise du TOKEN dans une variable et retrait des éventuelles guillemets ajoutées lors de la récupération via jq
if [ ${FEED_CACHE} = 1 ]; then
write_log DEBUG 'Getting token'
TOKEN=$(echo ${RES_AUTHENT} | jq -r '.data.token')
if [ ! -n "${TOKEN}" ]; then
write_log FATAL 'Empty token'
exit 1
fi
write_log INFO 'Feeding cache'
# IPv4 addresses
for ID_RANGE_V4 in ${ID_RANGES_V4}; do
# Récupération des informations V4 et vérification du code HTTP
INFOS_V4=$(${CURL} --header "Content-type: application/x-www-form-urlencoded" --header "token: $TOKEN" -X GET "${URL}/subnets/${ID_RANGE_V4}/addresses")
CODE_RETOUR_INFOS_V4=$(echo ${INFOS_V4} | jq '.code')
if [ ${CODE_RETOUR_INFOS_V4} != 200 ]; then
write_log FATAL "Wrong code returned for IPv4 range ${ID_RANGE_V4}: ${CODE_RETOUR_INFOS_V4}"
exit 1
fi
# Mise à jour du fichier de cache pour ce ID de subnet
echo ${INFOS_V4} > ${CHEMIN_CACHE}/${ID_RANGE_V4}
done
# Freeing RAM
INFOS_V4=''
CODE_RETOUR_INFOS_V4=''
# IPv6 ranges
for ID_RANGE_V6 in ${ID_RANGES_V6}; do
# Récupération des informations V6 et vérification du code HTTP
INFOS_RANGES_V6=$(${CURL} --header "Content-type: application/x-www-form-urlencoded" --header "token: $TOKEN" -X GET ${URL}/subnets/${ID_RANGE_V6}/slaves/)
CODE_RETOUR_INFOS_RANGES_V6=$(echo ${INFOS_RANGES_V6} | jq '.code')
if [ ${CODE_RETOUR_INFOS_RANGES_V6} != 200 ]; then
write_log FATAL "Wrong code returned for IPv4 range ${ID_RANGE_V6}: ${INFOS_RANGES_V6}"
exit 1
fi
echo ${INFOS_RANGES_V6} > ${CHEMIN_CACHE}/${ID_RANGE_V6}
done
# Freeing RAM
INFOS_RANGES_V6=''
CODE_RETOUR_INFOS_RANGES_V6=''
fi
MAC=$(grep vmbr1 /etc/pve/qemu-server/${VM_ID}.conf | \
sed -E 's/.*([[:xdigit:]:]{17}).*/\1/')
# Pour chaque subnet V4
for ID_RANGE_V4 in ${ID_RANGES_V4}; do
# Récupération des informations V4 en cache pour cet ID de subnet si le fichier de cache associé existe
if [ ! -f "${CHEMIN_CACHE}/${ID_RANGE_V4}" ]; then
write_log FATAL "File not found: ${CHEMIN_CACHE}/${ID_RANGE_V4}"
exit 1
fi
VM_IPV4=$(jq -r ".data[] | select(.custom_vm_id==\"${VM_ID}\") | .ip" ${CHEMIN_CACHE}/${ID_RANGE_V4})
# Si la valeur n'est pas vide et correspond à une IPV4
if [ -n "${VM_IPV4}" ]; then
# Ajout de la route associée
COMMAND="ip -4 route add ${VM_IPV4}/32 dev tap${VM_ID}i0"
echo "${COMMAND}"
write_log INFO "${COMMAND}"
${COMMAND}
# Updating ARP
COMMAND="ip neigh change ${VM_IPV4} lladdr ${MAC} dev tap${VM_ID}i0"
echo "${COMMAND}"
write_log INFO "${COMMAND}"
${COMMAND}
else
# En cas d'echec, on continue de parcourir les autres RANGES
write_log WARN 'Empty value or doen’t correspond to an IPv4'
fi
done
# Pour chaque subnet V6
for ID_RANGE_V6 in ${ID_RANGES_V6}; do
# Récupération des informations V6 en cache pour cet ID de subnet si le fichier de cache associé existe
if [ ! -f "${CHEMIN_CACHE}/${ID_RANGE_V6}" ]; then
write_log FATAL "File not found: ${CHEMIN_CACHE}/${ID_RANGE_V4}"
exit 1
fi
# Recherche des informations correspondants à la VM_ID
VM_IPV6=$(jq -r ".data[] | select(.custom_vm_id==\"${VM_ID}\") | .subnet" ${CHEMIN_CACHE}/${ID_RANGE_V6})
VM_NH=$(jq -r ".data[] | select(.custom_vm_id==\"${VM_ID}\") | .\"Next-hop\"" ${CHEMIN_CACHE}/${ID_RANGE_V6})
# Si la valeur n'est pas vide et correspond à un range IPV6
if [ -n "${VM_IPV6}" ]; then
if [ ${VM_NH} = 'null' ]; then
VM_NH=$(ipv6calc --action prefixmac2ipv6 --in prefix+mac --out ipv6addr fe80:: ${MAC})
fi
# Ajout de la route associée
COMMAND="ip -6 route add ${VM_IPV6}/48 via ${VM_NH} dev tap${VM_ID}i0"
echo "${COMMAND}"
write_log INFO "${COMMAND}"
${COMMAND}
# Updating NDP
COMMAND="ip neigh change ${VM_NH} lladdr ${MAC} dev tap${VM_ID}i0"
echo "${COMMAND}"
write_log INFO "${COMMAND}"
${COMMAND}
else
# En cas d'echec, on continue de parcourir les autres RANGES
echo "Valeur vide ou ne correspond pas à un range IPV6"
fi
done
write_log INFO 'Script ended'
exit 0