Created
March 15, 2016 18:40
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SNAT in Opencontrail
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| Workflow: | |
| - Assuming that you have a public network already setup | |
| - Enable that network to be External | |
| - neutron net-update public —router:external=True | |
| - Create a test network | |
| - neutron net-create test | |
| - neutron subnet-create —name test-subnet test 4.4.4.0/24 | |
| - Create a neutron router | |
| - neutron router-create r1 | |
| - neutron router-interface-add r1 test-subnet | |
| - Set the external GW for the router | |
| - neutron router-gateway-set r1 public | |
| Verification: | |
| root@oblocknode04:~# ip link | |
| 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default | |
| link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 | |
| 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000 | |
| link/ether 04:7d:7b:b2:8f:80 brd ff:ff:ff:ff:ff:ff | |
| 3: em1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond0 state UP mode DEFAULT group default qlen 1000 | |
| link/ether 08:9e:01:d9:28:26 brd ff:ff:ff:ff:ff:ff | |
| 4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 | |
| link/ether 04:7d:7b:b2:8f:81 brd ff:ff:ff:ff:ff:ff | |
| 5: em2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond0 state UP mode DEFAULT group default qlen 1000 | |
| link/ether 08:9e:01:d9:28:26 brd ff:ff:ff:ff:ff:ff | |
| 6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default | |
| link/ether 08:9e:01:d9:28:26 brd ff:ff:ff:ff:ff:ff | |
| 7: pkt1: <UP,LOWER_UP> mtu 65535 qdisc noqueue state UNKNOWN mode DEFAULT group default | |
| link/void 36:66:cb:92:8f:47 brd 00:00:00:00:00:00 | |
| 8: pkt3: <UP,LOWER_UP> mtu 65535 qdisc noqueue state UNKNOWN mode DEFAULT group default | |
| link/void 7a:db:24:6c:33:2f brd 00:00:00:00:00:00 | |
| 9: pkt2: <UP,LOWER_UP> mtu 65535 qdisc noqueue state UNKNOWN mode DEFAULT group default | |
| link/void 4e:1e:58:ff:82:40 brd 00:00:00:00:00:00 | |
| 10: vhost0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 1000 | |
| link/ether 08:9e:01:d9:28:26 brd ff:ff:ff:ff:ff:ff | |
| 11: pkt0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN mode DEFAULT group default qlen 500 | |
| link/ether d2:a5:ef:aa:d9:9f brd ff:ff:ff:ff:ff:ff | |
| 12: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default | |
| link/ether 86:5b:be:ca:22:f5 brd ff:ff:ff:ff:ff:ff | |
| 14: tapa5fbf358-90: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 500 | |
| link/ether 36:49:f3:26:5b:f8 brd ff:ff:ff:ff:ff:ff | |
| 15: veth62ec53ff-1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 | |
| link/ether 86:0a:af:28:29:5e brd ff:ff:ff:ff:ff:ff | |
| 16: vethc9da7b40-2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 | |
| link/ether 86:28:fc:43:c1:ca brd ff:ff:ff:ff:ff:ff | |
| ********************************************* | |
| root@oblocknode04:~# ip netns exec vrouter-884857f0-a961-4229-8653-8cb4ac56b965 iptables -t nat -L | |
| Chain PREROUTING (policy ACCEPT) | |
| target prot opt source destination | |
| Chain INPUT (policy ACCEPT) | |
| target prot opt source destination | |
| Chain OUTPUT (policy ACCEPT) | |
| target prot opt source destination | |
| Chain POSTROUTING (policy ACCEPT) | |
| target prot opt source destination | |
| MASQUERADE all -- anywhere anywhere | |
| all -- anywhere anywhere | |
| all -- anywhere anywhere | |
| MASQUERADE all -- anywhere anywhere | |
| ********************************************* | |
| root@oblocknode04:~# ip netns exec vrouter-884857f0-a961-4229-8653-8cb4ac56b965 ip link list | |
| 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default | |
| link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 | |
| 2: int-62ec53ff-1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 | |
| link/ether 02:b3:95:f7:b7:cd brd ff:ff:ff:ff:ff:ff | |
| 3: gw-c9da7b40-22: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 | |
| link/ether 02:d4:4c:fa:49:cf brd ff:ff:ff:ff:ff:ff | |
| root@oblocknode04:~# | |
| root@oblocknode04:~# | |
| ************************************************** | |
| root@oblocknode04:~# ip netns exec vrouter-884857f0-a961-4229-8653-8cb4ac56b965 ip route | |
| default dev gw-c9da7b40-22 scope link | |
| 10.87.25.0/25 dev gw-c9da7b40-22 proto kernel scope link src 10.87.25.4 | |
| 100.64.0.0/29 dev int-62ec53ff-1 proto kernel scope link src 100.64.0.4 | |
| root@oblocknode04:~# | |
| *********************************************** | |
| Introspect: | |
| http://10.87.25.250:8088/Snh_ServiceInstanceList?si_name= | |
| SNAT Healthchecks | |
| Healthcheck interval can be configured in contrail-svc-monitor.conf as | |
| check_service_interval=<seconds> |
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