Phaseout lol #223
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Phaseout lol #223
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Donald Buczek (donald)
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The individual netlog services send messages from system logfiles (e.g. /var/log/messages), which they consider interesting, to the clusterd of a specific node. The receiving clusterd uses syslog() to log these messages, so they end up in /var/log/message of that node. Let the clusterd of 'macheteinfach' listen to messages from the netlog services instead of that on 'lol'. We use 'macheteinfach', because the only current consumer of these messages is /project/azubi, which happens to run on 'macheteinfach'. This way, this project no longer needs to use ssh to get to the right logfile.
Send 'interesting' messages to the clusterd on macheteinfach instead to that one on 'lol'. See previous commit.
Each clusterd sends regular status messages (version and load
information) to a single clusterd which currently just collects them for
operator review.
buczek@macheteinfach:~/git/mxtools (phaseout-lol)$ telnet lol 234
Trying 141.14.29.220...
Connected to lol.
Escape character is '^]'.
clusterd 20220118-124724 stupid console
For historical messages, grep "clusterd" from /var/log/messages on lol (or "tail -f /var/log/messages |grep cluster")
v
abelson : ['DOWN',0,28,'0.01','V1.108 - 20170215-151907',0,'434420.8','4.9.38.mx64.164']
ace : ['UP','95647416.84',1,0,'20220118-124724',0,'921594.24','5.10.70.mx64.403']
acedia : ['UP',0,1,'0.72','20220118-124724','0.00104166666666667','30613821.35','5.10.24.mx64.375']
afk : ['UP','95647391.2',1,'0.1','20220118-124724',0,'5941821.44','4.14.87.mx64.236']
agentwhiskey : ['UP',0,1,'0.07','20220118-124724',0,460800,'5.10.82.mx64.414']
[...]
Connection closed by foreign host.
The utility of this can be debated and maybe we should remove that
completely.
Anyway, for now send status messages to "afk" instead of "lol", because "lol" is
going to be taken out of commission.
Some of the communications of clusterd is based on ip broadcasts. If the nodes are distributed over multiple ipv4 networks, different nodes need to do the broadcasts, because without special router setups, you can't broadcasts to remote subnets. For this reason, one node is a designated broadcaster for each subnet. This node is called "area router" in the code. Data to be sent to all nodes is sent via unicast to each area router which, in turn, brodcast it to the networks they are resposible for. Move the area router role for network 141.14.16/0 with broadcast address 141.14.31.255 from lol to wtf.
Donald Buczek (donald)
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All done, PR just for documentation