can't ssh an instance

[adair]

I can ping 10.0.0.2
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
64 bytes from 10.0.0.2: icmp_req=1 ttl=64 time=5.06 ms
64 bytes from 10.0.0.2: icmp_req=2 ttl=64 time=0.567 ms
64 bytes from 10.0.0.2: icmp_req=3 ttl=64 time=0.761 ms

but I can neither login an instance on the dashboard nor ssh an instance,likessh cirros@10.0.0.2,it will show
ssh: connect to host 10.0.0.2 port 22: Connection refused

my nova-secgoup is :nova secgroup-list-rules default,show
| IP Protocol | From Port | To Port | IP Range | Source Group |
+-------------+-----------+---------+-----------+--------------+
| icmp | -1 | -1 | 0.0.0.0/0 | |
| tcp | 22 | 22 | 0.0.0.0/0 | |
| udp | 22 | 22 | 0.0.0.0/0 | |
+-------------+-----------+---------+-----------+--------------+

so what's the problem ??????thank you

[Russell Bryant (russellb)]

I'm converting this bug into a question. Hopefully someone can help you debug your setup there. Thanks!