rotas

rotas_failover/rc.rotas

+#!/usr/bin/bash
+
+### Link 1
+IF_LINK1="eth2"
+MASK_LINK1="29"
+IP_LINK1="177.101.123.202"
+GW_LINK1="177.101.123.201"
+NT_LINK1="177.101.123.200"
+
+### Link 2
+IF_LINK2="eth3"
+MASK_LINK2="24"
+IP_LINK2="192.168.2.240"
+GW_LINK2="192.168.2.2"
+NT_LINK2="192.168.2.0"
+
+up_link1_default(){
+        logger "fail-over: Alterando para a rota padrão via $GW_LINK1"
+        ip route del default via $GW_LINK2
+        ip route add default via $GW_LINK1
+}
+
+up_link2_default(){
+        logger "fail-over: Alterando para a rota padrão via $GW_LINK1"
+        ip route del default via $GW_LINK1
+        ip route add default via $GW_LINK2
+}
+
+check_link() {
+    while [ "$1" != "stop" ]; do
+        #logger "fail-over: validando links"
+        if ping -c 1 -I $IF_LINK1 9.9.9.9 &> /dev/null; then
+            if ! ip route show default | grep -q "via $GW_LINK1"; then
+                up_link1_default
+            fi
+                fi
+        if ! ping -c 1 -I $IF_LINK1 9.9.9.9 &> /dev/null; then
+            if ip route show default | grep -q "via $GW_LINK1"; then
+                up_link2_default
+            fi
+        fi
+        sleep 15
+    done
+    logger "fail-over: Parando Servico"
+}
+
+main(){
+	logger "fail-over: Iniciando Servico"
+        #Definindo rotas link principal
+        ip route add $NT_LINK1/$MASK_LINK1 dev $IF_LINK1
+        ip route add $NT_LINK1/$MASK_LINK1 dev $IF_LINK1 table T1
+        ip route add default via $GW_LINK1 table T1
+
+        #Definindo rotas link Secundario
+        ip route add $NT_LINK2/$MASK_LINK2 dev $IF_LINK2
+        ip route add $NT_LINK2/$MASK_LINK2 dev $IF_LINK2 table T2
+        ip route add default via $GW_LINK2 table T2
+
+        #Validando se link dedicado esta ativo e fazendo failover
+        ip route add 9.9.9.9 via $GW_LINK1
+        ip route add 149.112.112.112 via $GW_LINK2
+
+        #Criando novos encaminhamentos das tabelas
+        ip rule add from $IP_LINK1 table T1
+        ip rule add from $IP_LINK2 table T2
+
+        # Marca pacotes para sairem pelo link2
+        ip rule add fwmark 2 table T2
+
+        #verifica o link e definindo rota default
+        check_link "$1"
+}
+
+main

rotas_failover/rotas_failover.sh

+####################################################################################
+#Variaveis de instalação
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+DT=$(date +%d%m%Y_%H%M%S)
+
+####################################################################################
+disable_selinux(){
+        sed -i /etc/selinux/config -r -e 's/^SELINUX=.*/SELINUX=disabled/g'
+}
+creating_service_rotas(){
+        cat >/etc/systemd/system/rotas.service<<EOF
+[Unit]
+Description=Rotas e FailOver
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=bash /etc/rc.d/rc.rotas
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target
+EOF
+}
+install_rota(){
+        cd /etc/rc.d/
+        wget http://git.usb.org.br/infra/scripts/raw/master/rc.rotas -P /etc/rc.d/ -O rc.rotas
+}
+starting_service_rota(){
+        systemctl enable rotas.service --quiet
+        systemctl start rotas.service --quiet
+}
+
+stty echo
+echo -e "${RED}Iniciando Instalação${NC}"
+echo -e "${RED}Desabilitando SE Linux${NC}"
+disable_selinux
+echo -e "${RED}Criando rotas.service${NC}"
+creating_service_rotas
+echo -e "${RED}instalando rc.rotas${NC}"
+install_rota
+echo -e "${RED}Iniciando rotas.service${NC}"
+starting_service_rota
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