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How to use replace_route method in localstack

Best Python code snippet using localstack_python

failover_gw.py

Source:failover_gw.py

...14    if not m:15        return None16    else:17        return m.group(1)18def replace_route(route, gw):19    res = subprocess.check_output([ 'ip', 'route', 'replace', route, 'via', gw])20    res = res.decode('utf-8')21    logging.debug("'ip route replace %s via %s' returned '%s'", route, gw, res)22    return True23def main():24    config_file = "failover_gw.yaml"25    config = yaml.safe_load(open(config_file, 'r'))26    if config['debug']:27        log_level = "DEBUG"28    else:29        log_level = "INFO"30    log_format='%(asctime)s (%(levelname)s) %(message)s'31    logging.basicConfig(level=log_level, format=log_format)32    poll_interval = config['poll_interval'] or 1033    gw_interface = config['gw_interface'] or 'eth0'34    check_ip = config['check_ip']35    managed_route = config['managed_route']36    primary_gw = config['primary_gw']37    backup_gw = config['backup_gw']38    ping_timeout = config['ping_timeout'] or 200039    ping_count = config['ping_count'] or  340    logging.info("Started")41    while True:42        # Arp request primary and backup gateway looking for a response43        arp_primary = ArpRequest(primary_gw, gw_interface)44        primary_is_up = arp_primary.request()45        if primary_is_up:46            ping_via_primary = Ping(check_ip,47                                    ping_timeout,48                                    raw=True,49                                    source_interface=gw_interface,50                                    dest_mac=arp_primary.getHardwareAddress())51            res = ping_via_primary.run(ping_count)52            if res.ret_code == 0:53                logging.info("Ping %s via primary gateway %s RTT=%.3f,%.3f,%.3fms",54                             check_ip, primary_gw,55                             res.min_rtt, res.avg_rtt, res.max_rtt)56                primary_gw_up = True57            else:58                logging.info("Ping %s via primary gateway %s failed : %s",59                             check_ip, primary_gw, res.output)60                primary_gw_up = False61        else:62            logging.info("Primary gateway %s is down", primary_gw)63            primary_gw_up = False64        arp_backup = ArpRequest(backup_gw, gw_interface)65        backup_is_up = arp_backup.request()66        if backup_is_up:67            ping_via_backup = Ping(check_ip,68                                   ping_timeout,69                                   raw=True,70                                   source_interface=gw_interface,71                                   dest_mac=arp_backup.getHardwareAddress())72            res = ping_via_backup.run(ping_count)73            if res.ret_code == 0:74                logging.info("Ping %s via backup gateway %s RTT=%.3f,%.3f,%.3fms",75                             check_ip, backup_gw,76                             res.min_rtt, res.avg_rtt, res.max_rtt)77                backup_gw_up = True78            else:79                logging.info("Ping %s via backup gateway %s failed : %s",80                             check_ip, backup_gw, res.output)81                backup_gw_up = False82            backup_gw_up = (res.ret_code == 0)83        else:84            logging.info("Backup gateway %s is down", backup_gw)85            backup_gw_up = False86        logging.debug("primary gateway ARP is %d GW is %d secondary gateway ARP is %d GW is %d",87                      primary_is_up, primary_gw_up, backup_is_up, backup_gw_up)88        current_gw = get_route_gw(managed_route)89        logging.debug("Current gateway %s" % current_gw)90        if primary_gw_up:91            if managed_route and current_gw != primary_gw:92                logging.info("Switch route %s to primary gateway %s",93                             managed_route, primary_gw)94                replace_route(managed_route, primary_gw)95        elif backup_gw_up:96            if managed_route and current_gw != backup_gw:97                logging.info("Switch route %s to backup gateway %s",98                             managed_route, backup_gw)99                replace_route(managed_route, backup_gw)100        else:101            logging.info("No routes for %s as neither gateway responding for %s",102                         managed_route, check_ip)103        time.sleep(config['poll_interval'])104if __name__ == '__main__':...

check_ftdv_status.py.erb

Source:check_ftdv_status.py.erb

...14rtb = vpc.get_all_route_tables(route_table_ids=routeTable)15apiURL = 'https://<%= @apiurl %>'16headers = {'content-type': "application/json", 'cache-control': "no-cache"}17def routePdFTDV1():18    vpc.replace_route(route_table_id=routeTable,19                      destination_cidr_block='0.0.0.0/0',20                      interface_id=eniFTDv1)21    vpc.replace_route(route_table_id=routeTable,22                      destination_cidr_block='<%= @ftdv_vpn_ip1 %>',23                      interface_id=eniFTDv1)24    vpc.replace_route(route_table_id=routeTable,25                      destination_cidr_block='<%= @ftdv_vpn_ip2 %>',26                      interface_id=eniFTDv1)27def routePdFTDV2():28    vpc.replace_route(route_table_id=routeTable,29                      destination_cidr_block='0.0.0.0/0',30                      interface_id=eniFTDv2)31    vpc.replace_route(route_table_id=routeTable,32                      destination_cidr_block='<%= @ftdv_vpn_ip1 %>',33                      interface_id=eniFTDv2)34    vpc.replace_route(route_table_id=routeTable,35                      destination_cidr_block='<%= @ftdv_vpn_ip2 %>',36                      interface_id=eniFTDv2)37for rt in rtb:38    for a in rt.routes:39        eniRTB = a.interface_id40valid = True41while valid:42    insidePing1 = os.system("ping -c 15 -w 5 "+insideFTDv1+"|grep -c '100% packet loss'")43    insidePing2 = os.system("ping -c 15 -w 5 "+insideFTDv2+"|grep -c '100% packet loss'")44    # insidePing1 IP exit with 0 failure45    # Lock file doesn't exsist46    if insidePing1 == 0 and (not os.path.isfile('/tmp/ftdv_lock')):47        # if eniRTB not equal to ENI2 then change route48        if eniRTB == eniFTDv1:...

Test.py

Source:Test.py

2route_input = "6863930,90000260498780,90000260412950,5765410,5765420,877579610,877579620,491431860,6647991,422366081,422366071,6714661,422366201,422366191,90000285124710,90000285201350,132084800,622185390,422361390,422361400,6808220,6809490,6809500,5849390,5791461,6714681,877579451,877579441,6716081,5762391,422362640,422362650,422362630,6738250,132085000,132085010,6787611,422362531,422362521,7008661,132085031,132085021,7008701,7008691,6643861,6799400,6799410,126347950,126347960,90000242392280,90000242392200,90000242392320,90000242315780,300503480,300503490,152550970,152550990,152551010,152551030,152551050,6629510,90000284502220,90000284359420,6823670,6823690,6823660,6823610,300503770,300503790,300503800,6629470,6629410,6629420,6823560,6824140,6824160,701371610,701371620,6808920,6808940,6808970,6659330,622586230,622586240,5823321,6839311,6671701,6671691,5747601747601,5747611,6846120,6846130,5791380,5777010,6678250,6644370,6644380,6856660,6677690,6644420,6644430,6677730,6677740,6677790,500623910,500623920,6677750,501738330,501738340,6858750,6858760"3# comm = "1000,2,200,5,10001"4# comm = "1000,2,3,4,5,10001"5link_input = "6669771,6669791,6669781,5777051,5823321,6839311,6671701,6671691,5747601"6def replace_route(link, route):7    comm_list = link.split(",")8    route_list = route.split(",")9    flag = False10    for i in range(len(comm_list)):11        replace_start_index = -112        replace_end_index = -113        if comm_list[i] in route_list:14            replace_start_index = route_list.index(comm_list[i])15        check_end_index = -116        if i != len(comm_list):17            for i_r in reversed(range(len(comm_list))):18                if i_r > i and comm_list[i_r] in route_list:19                    replace_end_index = route_list.index(comm_list[i_r])20                    check_end_index = i_r21                    break22        if (replace_end_index > replace_start_index) and (replace_start_index > 0) and (replace_end_index > 0):23            replace_str = ','.join(comm_list[i:check_end_index+1])24            be_replace_str = ','.join(route_list[replace_start_index:replace_end_index+1])25            if be_replace_str.strip() != replace_str.strip():26                route = route.replace(be_replace_str, replace_str)27                flag = True28            # print("replace_str: ", replace_str)29            # print("be_replace_str: ", be_replace_str)30            # print("s: ", s)31            break32    return route, flag33r, f = replace_route(link_input, route_input)34print("r=", r)...

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