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<div id=":1no"><div><div><div>Hi,</div><div>After restarting a HN3 It doesn't connect to my MySQL server anymore (MySQL is running inside an OVZ container, called sql-server, that lives on HN3. Connections from HN1 or HN2 to MySQL work fine). The reason seems to be network related. </div>
<div><br></div><div>HN3: <a href="http://77.2.179.77/24" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.77/24</a></div><div>sql-server: <a href="http://77.2.179.120/24" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.120/24</a> (remember, it lives on HN3)</div>
<div><br></div><div>lets do a ping, from HN3 to sql-server container</div><div><br></div><div>HN3:~# ping 77.2.179.120</div><div>PING 77.2.179.120 (77.2.179.120) 56(84) bytes of data.</div><div>64 bytes from <a href="http://77.2.179.120" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.120</a>: icmp_seq=1 ttl=64 time=0.043 ms</div>
<div><br></div><div>Seems to work fine, but when we use tcpdump to examine that ping, we get this:</div><div><br></div><div>HN3:~# tcpdump ip proto 1 -i venet0</div><div>16:07:15.175602 IP 10.0.10.3 > <a href="http://77.2.179.120" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.120</a>: ICMP echo request, id 33323, seq 28, length 64</div>
<div>16:07:15.175623 IP 77.2.179.120 > <a href="http://10.0.10.3" target="_blank" style="color: rgb(92, 69, 32); ">10.0.10.3</a>: ICMP echo reply, id 33323, seq 28, length 64</div><div><br></div><div>Why HN3 use 10.0.10.3 src ip address instead of 77.2.179.77 ? At least it's what 'ip ro' say: </div>
<div><br></div><div>HN3:~# ip ro</div><div>10.0.0.20 dev venet0 scope link </div><div>77.2.179.122 dev venet0 scope link </div><div>77.2.179.120 dev venet0 scope link </div><div>77.2.179.126 dev venet0 scope link </div>
<div>77.2.179.125 dev venet0 scope link </div><div><a href="http://10.0.0.0/24" target="_blank" style="color: rgb(92, 69, 32); ">10.0.0.0/24</a> dev vmbr1 proto kernel scope link src 10.0.0.3 </div><div><a href="http://77.2.179.0/24" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.0/24</a> dev vmbr0 proto kernel scope link src 77.2.179.77 </div>
<div><a href="http://10.10.0.0/24" target="_blank" style="color: rgb(92, 69, 32); ">10.10.0.0/24</a> dev eth3 proto kernel scope link src 10.10.0.3 </div><div><a href="http://10.0.10.0/24" target="_blank" style="color: rgb(92, 69, 32); ">10.0.10.0/24</a> dev eth2 proto kernel scope link src 10.0.10.3 </div>
<div>default via 77.2.179.7 dev vmbr0 </div><div><br></div><div>packets to <a href="http://77.2.179.0/24" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.0/24</a> must use 77.2.179.77 as src address.</div><div>
<br>
</div><div>What is that I'm missing? Maybe "venet" doesn't look 'ip ro' table? How could I force a correct src address for the ip packets to my sql-server?</div><div><br></div><div><br></div><div>
<br></div><div>Note:</div><div>packet src addr from others HN are correct:</div><div><br></div><div>16:25:53.535392 IP 77.2.179.75 > <a href="http://77.2.179.120" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.120</a>: ICMP echo request, id 6748, seq 4, length 64</div>
<div>16:25:53.535423 IP 77.2.179.120 > <a href="http://77.2.179.75" target="_blank" style="color: rgb(92, 69, 32); ">77.2.179.75</a>: ICMP echo reply, id 6748, seq 4, length 64</div><div><br></div><div>br</div></div></div>
</div></div></span>-- <br>Marc<br>