Package: mysql-mmm-agent
Version: 2.2.1-1.1
Severity: important
We were having issues migrating things via 'mmm_control move_role foo bar{1,2}'
because when the virutal IP (vIP) moved from one host to the other it was no
longer accessible (via ping or telnet) over the network.
It turns out after the migration of the vIP, a gratuitous ARP was no longer
being sent out. This worked in Debian 6 and 7, but not 8.
After some searching, we then ran across this web page:
http://www.programering.com/a/MDM3ADNwATI.html
which explains the situation.
In previous versions of Debian, the version of the module Net::ARP included
was 1.0.4. In that release, the value of $Net::ARP::VERSION was "1.0". So
when you go to line 136 of /usr/share/perl5/MMM/Agent/Helpers/Network.pm
you have the following:
if ($Net::ARP::VERSION < 1.0) {
This test used to work because "1.0" < "1.0" is a valid comparison.
However, in Debian 8, the value of $Net::ARP::VERSION is now "1.0.8", so the
above test is not valid, as (1.0.8 < 1.0) is not a valid numerical comparison
(which "<" tests for).
The fix to get mysql-mmm-agent working and sending out ARPs again is to change
line 136 to:
if ($Net::ARP::VERSION lt 1.0) {
so that a string comparison is done, and the if-else stanza is executed.
Can you please update the package to patch line 136 of Network.pm?
-- System Information:
Debian Release: 8.1
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages mysql-mmm-agent depends on:
ii iproute 1:3.16.0-2
ii libalgorithm-diff-perl 1.19.02-3
ii libdbd-mysql-perl 4.028-2+b1
ii libdbi-perl 1.631-3+b1
ii libnet-arp-perl 1.0.8-2
ii libproc-daemon-perl 0.14-2
ii mysql-mmm-common 2.2.1-1.1
mysql-mmm-agent recommends no packages.
mysql-mmm-agent suggests no packages.
-- Configuration Files:
/etc/default/mysql-mmm-agent changed [not included]
/etc/mysql-mmm/mmm_agent.conf changed [not included]
-- no debconf information
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