[openstack-dev] Couldn't ping/ssh cirros instance using its floating ip

Assaf Muller amuller at redhat.com
Tue Nov 10 01:07:29 UTC 2015


You will have a much better time on ask.openstack.org - It's a super
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for questions exactly like this one. You posted your question to a
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where we choose release names and make other ultra important mission
critical decisions.

On Mon, Nov 9, 2015 at 6:34 PM, Aishwarya Thangappa_Professional
<aishwarya.thangappa at gmail.com> wrote:
> Hi there,
>
> In a fresh devstack(master branch) install,
>
> 1. I booted up a cirros instance and associated it with a floating ip.
> 2. Created a security group rule to allow tcp port 22 and associated it with
> the nova instance
> 3. From the qrouter namespace, I can ping both the private and fip address
> of the instance.
> 4. But, couldn’t ssh into the instance from the external network using its
> fip.
>
>
> neutron net-list
> +--------------------------------------+---------+----------------------------------------------------------+
> | id                                   | name    | subnets
> |
> +--------------------------------------+---------+----------------------------------------------------------+
> | 376357b1-6abe-46c1-844b-548a051391d5 | public  |
> 41b86431-41d6-4503-8329-767f84bad4d5 172.24.4.0/24       |
> |                                      |         |
> 79f0bf72-8c98-478b-a463-b6e3a101e6b7 2001:db8::/64       |
> | ebe713c9-5064-48ec-9094-e44e150d36ad | private |
> c7ebd45c-5a1f-4d97-a90e-b221f19c7177 10.0.0.0/24         |
> |                                      |         |
> d7aac86f-0b2c-4dd4-88cf-246bfb58006e fd69:7a94:27b7::/64 |
> +--------------------------------------+---------+—————————————————————————-----------------------------————+
>
> $ neutron router-list
> +--------------------------------------+---------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------+-------+
> | id                                   | name    | external_gateway_info
> | distributed | ha    |
> +--------------------------------------+---------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------+-------+
> | 46715086-3f9c-4fb1-91b4-b41da24baa2f | router1 | {"network_id":
> "376357b1-6abe-46c1-844b-548a051391d5", "enable_snat": true,
> "external_fixed_ips": [{"subnet_id": "41b86431-41d6-4503-8329-767f84bad4d5",
> "ip_address": "172.24.4.2"}, {"subnet_id":
> "79f0bf72-8c98-478b-a463-b6e3a101e6b7", "ip_address": "2001:db8::1"}]} |
> True        | False |
> +--------------------------------------+---------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-------------+-------+
>
> $ neutron security-group-rule-list
> +--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
> | id                                   | security_group | direction |
> ethertype | protocol/port | remote          |
> +--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
> | 1cfb9a69-61e0-4df3-b04c-f9f9f4a54cc3 | default        | egress    | IPv4
> | any           | any             |
> | 4afe5008-c192-4582-95c8-21b1f64ab2a5 | default        | ingress   | IPv6
> | any           | default (group) |
> | 5ce1e34d-7b9d-41d8-9a15-94711824ae68 | secgroup1      | ingress   | IPv4
> | 22/tcp        | any             |
> | 6b3a8008-b446-4004-a72a-6ea2c9bbf375 | default        | egress    | IPv6
> | any           | any             |
> | 7feb5969-5f9d-4525-93a3-a108db59f65b | default        | egress    | IPv6
> | any           | any             |
> | 7ff6a82f-6c8c-4bb5-b893-d06272b0d69b | default        | ingress   | IPv4
> | any           | default (group) |
> | 90f385c9-de19-4ede-b4ef-bf199537b49b | secgroup1      | egress    | IPv6
> | any           | any             |
> | c21ed80d-fbee-4db6-8518-60a1070aff20 | secgroup1      | egress    | IPv4
> | 22/tcp        | any             |
> | c3d1f6ea-b7c4-47ea-ace3-f9b3b1bf8d25 | default        | egress    | IPv4
> | any           | any             |
> | dc09a10a-37db-4a33-9abc-00798221254e | secgroup1      | egress    | IPv4
> | any           | any             |
> | df4d7930-6ce0-43c8-996f-ced126c7cba0 | default        | ingress   | IPv4
> | any           | default (group) |
> | e0d84fea-e47c-48f6-a29b-d41231674256 | default        | ingress   | IPv6
> | any           | default (group) |
> +--------------------------------------+----------------+-----------+-----------+---------------+-----------------+
>
> $ nova show node1
> +--------------------------------------+-----------------------------------------------------------------+
> | Property                             | Value
> |
> +--------------------------------------+-----------------------------------------------------------------+
> | OS-DCF:diskConfig                    | MANUAL
> |
> | OS-EXT-AZ:availability_zone          | nova
> |
> | OS-EXT-SRV-ATTR:host                 | ubuntu
> |
> | OS-EXT-SRV-ATTR:hostname             | node1
> |
> | OS-EXT-SRV-ATTR:hypervisor_hostname  | ubuntu
> |
> | OS-EXT-SRV-ATTR:instance_name        | instance-00000002
> |
> | OS-EXT-SRV-ATTR:kernel_id            |
> |
> | OS-EXT-SRV-ATTR:launch_index         | 0
> |
> | OS-EXT-SRV-ATTR:ramdisk_id           |
> |
> | OS-EXT-SRV-ATTR:reservation_id       | r-nokf6xx0
> |
> | OS-EXT-SRV-ATTR:root_device_name     | /dev/vda
> |
> | OS-EXT-SRV-ATTR:user_data            | -
> |
> | OS-EXT-STS:power_state               | 1
> |
> | OS-EXT-STS:task_state                | -
> |
> | OS-EXT-STS:vm_state                  | active
> |
> | OS-SRV-USG:launched_at               | 2015-11-09T21:59:13.000000
> |
> | OS-SRV-USG:terminated_at             | -
> |
> | accessIPv4                           |
> |
> | accessIPv6                           |
> |
> | config_drive                         | True
> |
> | created                              | 2015-11-09T21:59:03Z
> |
> | flavor                               | m1.tiny (1)
> |
> | hostId                               |
> 3cd3087bf1edbd27ef36a03a5b862b810aa8653fed924c9efd6dca8b        |
> | id                                   |
> c936d684-5a20-4842-b47d-f6c336eb4e96                            |
> | image                                | cirros-0.3.3-x86_64-disk
> (cc56d0b4-d143-4859-971d-5ef6ba9e2820) |
> | key_name                             | -
> |
> | metadata                             | {}
> |
> | name                                 | node1
> |
> | os-extended-volumes:volumes_attached | []
> |
> | private network                      | 10.0.0.4,
> fd69:7a94:27b7:0:f816:3eff:fe39:59ac, 172.24.4.5      |
> | progress                             | 0
> |
> | security_groups                      | default, secgroup1
> |
> | status                               | ACTIVE
> |
> | tenant_id                            | 5a93452f68c04785aff04fb4572f7472
> |
> | updated                              | 2015-11-09T21:59:13Z
> |
> | user_id                              | 124d5155bc9742d2a3f7e018ada5bd07
> |
> +--------------------------------------+——————————————————————————---------------------------------——————+
>
> $ sudo ip route add 172.24.4.0/24 dev br-ex
>
> $ route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 0.0.0.0         10.0.2.2        0.0.0.0         UG    0      0        0 eth0
> 10.0.2.0        0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 172.24.4.0      0.0.0.0         255.255.255.0   U     0      0        0
> br-ex
> 192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0
> virbr0
>
> $ ip netns
> snat-46715086-3f9c-4fb1-91b4-b41da24baa2f
> qrouter-46715086-3f9c-4fb1-91b4-b41da24baa2f
> qdhcp-ebe713c9-5064-48ec-9094-e44e150d36ad
>
> $ sudo ip netns exec qrouter-46715086-3f9c-4fb1-91b4-b41da24baa2f ssh
> cirros at 10.0.0.4
> cirros at 10.0.0.4's password:
> $ exit
> Connection to 10.0.0.4 closed.
>
> $ sudo ip netns exec qrouter-46715086-3f9c-4fb1-91b4-b41da24baa2f ssh
> cirros at 172.24.4.5
> The authenticity of host '172.24.4.5 (172.24.4.5)' can't be established.
> RSA key fingerprint is 4a:96:f0:ea:1f:d0:4e:bb:0f:3f:74:f8:b4:3c:7e:75.
> Are you sure you want to continue connecting (yes/no)? yes
> Warning: Permanently added '172.24.4.5' (RSA) to the list of known hosts.
> cirros at 172.24.4.5's password:
> $ exit
> Connection to 172.24.4.5 closed.
>
> $ sudo ip netns exec qrouter-46715086-3f9c-4fb1-91b4-b41da24baa2f ip a
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
> default
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>     inet 127.0.0.1/8 scope host lo
>        valid_lft forever preferred_lft forever
>     inet6 ::1/128 scope host
>        valid_lft forever preferred_lft forever
> 2: rfp-46715086-3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
> pfifo_fast state UP group default qlen 1000
>     link/ether ca:fb:c6:7d:05:36 brd ff:ff:ff:ff:ff:ff
>     inet 169.254.31.28/31 scope global rfp-46715086-3
>        valid_lft forever preferred_lft forever
>     inet 172.24.4.5/32 brd 172.24.4.5 scope global rfp-46715086-3
>        valid_lft forever preferred_lft forever
>     inet6 fe80::c8fb:c6ff:fe7d:536/64 scope link
>        valid_lft forever preferred_lft forever
> 6: qr-f97ba294-61: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
> UNKNOWN group default
>     link/ether fa:16:3e:db:4e:c1 brd ff:ff:ff:ff:ff:ff
>     inet6 fd69:7a94:27b7::1/64 scope global
>        valid_lft forever preferred_lft forever
>     inet6 fe80::f816:3eff:fedb:4ec1/64 scope link
>        valid_lft forever preferred_lft forever
> 8: qr-2eedb07a-73: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
> UNKNOWN group default
>     link/ether fa:16:3e:36:70:4d brd ff:ff:ff:ff:ff:ff
>     inet 10.0.0.1/24 brd 10.0.0.255 scope global qr-2eedb07a-73
>        valid_lft forever preferred_lft forever
>     inet6 fe80::f816:3eff:fe36:704d/64 scope link
>        valid_lft forever preferred_lft forever
>
> $ sudo ip netns exec qrouter-46715086-3f9c-4fb1-91b4-b41da24baa2f route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 10.0.0.0        0.0.0.0         255.255.255.0   U     0      0        0
> qr-2eedb07a-73
> 169.254.31.28   0.0.0.0         255.255.255.254 U     0      0        0
> rfp-46715086-3
>
> Can some one please point out what is going wrong here? Thank you!
>
> -Aishwarya.
>
>
>
>
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