In the past, I had been using kSar to quickly plot graphs from sar files that I had collected from the systems, but I would really prefer a system that it can consolidate all the sar reports from various systems and generate beautiful graphs to do performance analysis.
I know there are tons of tools out there that can do that : Nagios, Sensu, Shinken, Cacti, just to name a few, but all these is generating the graphs base on the data it collected instead of the sysstat sar file located in /var/log/sa.
I still haven’t find any that do that, but the closer I found is SarGraph, which will run a periodic sar command remotely to systems and keep the data on the sargraph servers. Currently it only give 4 performance metric: CPU, Memory, Swap and Run-Queue Size.
After a few weeks of testing and experimenting, finally found out the issue of the setup:some repos were not enable by default
Now, I had figure the issue and put the changes into cfengine (yes I know is old school) and will also include in ansible playbook (WIP).
I don’t know how to cook except fried egg, and boil water (for instance noodles and 3 in 1 coffee/tea).
I don’t know how to play any music, can’t even sing without hurting others’ eardrums.
I don’t know how to sew – can’t even sew back a button on the shirt.
I don’t know how to …
What am I good in doing? Maybe only 1 thing I am really good in – being myself!
All of the sudden, I felt like the time had halt, and nothing seem to move.
This is just a small stopover, and I shall start again soon.
I am just here to deliver my message
The important part is the learning along the journey, winning is just the icing on top of it!
It seem like CentOS7/RHEL7 is slightly different from CentOS6/RHEL6, when trying to install from USB with multiple boot images (eg YUMI).
CentOS7/RHEL7 require “inst.stage2″^^1 to be specific, and the default from the ISO file is “inst.stage2=hd:LABEL=CentOS\x207\x20x86_64” or “inst.stage2=hd:LABEL=RHEL-7.3\x20x86_64”. This will need to be amend to reflect the correct LABEL of the usb.
How to find out the LABEL for your USB? You can refer to here. But to save your time (since you found this instead of that):
1. Boot into Linux
2. Assume your USB is on /dev/sda, and the first partition contain your multiboot:
Example of the label on my USB is “MULTIBOOT”, therefore I need to change the “inst.stage2” to:
which will load the stage2 image from /dev/sda1/multiboot/CentOS-7
^^1 – This specifies the location to fetch only the installer runtime image; packages will be ignored.
^^2 – More info on the Boot options from here.