Failover inconsistent when a node is disconnected from the network forcefully
<[email protected]> Mon, 16 Jul 2007 17:58:53 +0530
| Newsgroups | gmane.comp.apache.mod-wackamole.general |
|---|---|
| Message-ID | <[email protected]> |
This is a multi-part message in MIME format. --===============2190670214667543061== Content-class: urn:content-classes:message Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C7C7A4.DFD7F877" This is a multi-part message in MIME format. ------_=_NextPart_001_01C7C7A4.DFD7F877 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, =20 We got the following problem when we were testing wackamole in our Lab. We observed that the failover is not consistent among the nodes. =20 We had a 4 node(A,B,C,D) configuration. =20 We have a Single Virtual IP configured. =20 Initially B acquired the VIP.Through the wackatrl tool we tested who has acquired the VIP. All the 4 nodes A,B,C and D showed that B has acquired =20 We tried to unplug B from the LAN(by pulling out the network cable). Now A has acquired the VIP. A, C and D tell that A has acquired the VIP. =20 Now B is connected back to the LAN . When B was connected 'wackatrl -l' in B tells that B has acquired the VIP, whereas A,C and D tell that A has acquired the VIP. When we tried to reach the VIP through putty via ssh. It got connected to A. =20 When A was disconnected from LAN, B,C and D tell that B has acquired the VIP. But when we tried to connect the VIP through putty via ssh, and the connection timed out. =20 Can someone throw some light on what would be the cause? =20 Thanks, Suganthi The information contained in this electronic message and any attachments to= this message are intended for the exclusive use of the addressee(s) and= may contain proprietary, confidential or privileged information. If you= are not the intended recipient, you should not disseminate, distribute or= copy this e-mail. Please notify the sender immediately and destroy all= copies of this message and any attachments.=20 WARNING: Computer viruses can be transmitted via email. The recipient= should check this email and any attachments for the presence of viruses.= The company accepts no liability for any damage caused by any virus= transmitted by this email. =20 www.wipro.com ------_=_NextPart_001_01C7C7A4.DFD7F877 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; charset=3Dus-ascii"> <META content=3D"MSHTML 6.00.2900.3132" name=3DGENERATOR></HEAD> <BODY> <DIV><FONT face=3DArial size=3D2><SPAN=20 class=3D183332112-16072007>Hi,</SPAN></FONT></DIV> <DIV><FONT face=3DArial size=3D2><SPAN=20 class=3D183332112-16072007></SPAN></FONT> </DIV> <DIV><FONT face=3DArial size=3D2><SPAN class=3D183332112-16072007>We got= the following=20 problem when we were testing wackamole in our Lab. We observed that the= failover=20 is not consistent among the nodes.</SPAN></FONT></DIV> <DIV><FONT face=3DArial size=3D2><SPAN=20 class=3D183332112-16072007></SPAN></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>We had a 4 node(A,B,C,D)=20 configuration.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>We have a Single Virtual IP=20 configured.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>Initially B acquired the VIP.Through the= wackatrl=20 tool we tested who has acquired the VIP. All the 4 nodes A,B,C and D showed= that=20 B has acquired</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>We tried to unplug B from the LAN<SPAN=20 class=3D183332112-16072007>(by pulling out the network cable)</SPAN>. Now A= has=20 acquired the VIP. A, C and D tell that A has acquired the VIP.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>Now B is connected<SPAN class= =3D183332112-16072007>=20 back to</SPAN> the LAN . When B was connected 'wackatrl -l' in B tells= that=20 B has acquired<SPAN class=3D183332112-16072007> the VIP</SPAN>, whereas A,C= and D=20 tell that A has acquired<SPAN class=3D183332112-16072007> the VIP</SPAN>.= When we=20 tried to <SPAN class=3D183332112-16072007>reach </SPAN>the VIP=20 through <SPAN class=3D183332112-16072007>putty via ssh</SPAN>. It got= =20 connected to A.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>When A was disconnected from LAN, B,C and= D tell=20 that B has acquired the VIP. But when we tried to connect the VIP through= <SPAN=20 class=3D183332112-16072007>putty via ssh</SPAN>, <SPAN=20 class=3D183332112-16072007>and </SPAN><SPAN class=3D183332112-16072007>the= =20 connection</SPAN> timed out.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial><FONT size=3D2><SPAN class=3D183332112-16072007>Can= someone=20 throw some light on what would be the= cause</SPAN>?</FONT></FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><SPAN class=3D183332112-16072007><FONT face=3DArial=20 size=3D2>Thanks,</FONT></SPAN></DIV> <DIV><SPAN class=3D183332112-16072007><FONT face=3DArial=20 size=3D2>Suganthi</FONT></SPAN></DIV></BODY></HTML> <table><tr><td bgcolor=3D#ffffff><font color=3D#000000><br> The information contained in this electronic message and any attachments to= this message are intended for the exclusive use of the addressee(s) and= may contain proprietary, confidential or privileged information. If you= are not the intended recipient, you should not disseminate, distribute or= copy this e-mail. Please notify the sender immediately and destroy all= copies of this message and any attachments. <br> <br> WARNING: Computer viruses can be transmitted via email. The recipient= should check this email and any attachments for the presence of viruses.= The company accepts no liability for any damage caused by any virus= transmitted by this email.<br> <br> www.wipro.com<br> </font></td></tr></table> ------_=_NextPart_001_01C7C7A4.DFD7F877-- --===============2190670214667543061== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ wackamole-users mailing list [email protected] http://lists.backhand.org/mailman/listinfo/wackamole-users --===============2190670214667543061==--