log-collector-script checks for netfilter tables & updates to network info scrape

[abeowlu]

Issue #, if available:

Description of changes:
Making changes to the log-collector-script;

• changing and updating command to get implemented networking mode, iptables, ipvs, or nft
• suppressing errors and verbose output from this command

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Testing Done
shfmt linted
script execution

[abeowlu]

@guessi , I created a PR for collecting nft information in the log-collector-script. And suppressing verbose output and error to stdout introduced in #1795

[mselim00]

thanks for putting this together, some initial comments

[mselim00]

let's keep these as they were. if you can share details on why appending would be more appropriate here, we can evaluate this for a separate change

[abeowlu]

• my local repo script does not output/tee ipvs info collected to stdout, but the testing the script on main does...

        This is version 0.7.8. New versions can be found at https://github.com/awslabs/amazon-eks-ami/blob/main/log-collector-script/

Trying to collect common operating system logs...
Trying to collect kernel logs...
Trying to collect modinfo... Trying to collect mount points and volume information...
Trying to collect SELinux status...
Trying to collect iptables information... /sbin/ipvsadm
Trying to collect ipvs information... -A -t 198.19.10.0:webcache -s rr
-a -t 198.19.10.0:webcache -r 100.64.0.9:webcache -m -w 1
-A -t 198.19.20.0:webcache -s rr
-a -t 198.19.20.0:webcache -r 100.64.0.9:webcache -m -w 1
-A -t 198.19.30.0:webcache -s rr
-a -t 198.19.30.0:webcache -r 100.64.0.9:webcache -m -w 1
sed: -e expression #1, char 18: unknown option to `s'
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port                 CPS    InPPS   OutPPS    InBPS   OutBPS
  -> RemoteAddress:Port
TCP  198.19.10.0:8080                    0        0        0        0        0
  -> 100.64.0.9:8080                     0        0        0        0        0
TCP  198.19.20.0:8080                    0        0        0        0        0
  -> 100.64.0.9:8080                     0        0        0        0        0
TCP  198.19.30.0:8080                    0        0        0        0        0
  -> 100.64.0.9:8080                     0        0        0        0        0

IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port               Conns   InPkts  OutPkts  InBytes OutBytes
  -> RemoteAddress:Port
TCP  198.19.10.0:8080                    0        0        0        0        0
...

• can become unnecessarily verbose. I can update to ipvsadm --save | tee ${COLLECT_DIR}"/networking/... >> ${COLLECT_DIR}"/networking/... like in my local repo, but I think this redundant so the shortened to append to the log file. Script output now is;

        This is version 0.7.9. New versions can be found at https://github.com/awslabs/amazon-eks-ami/blob/main/log-collector-script/

Trying to collect common operating system logs...
Trying to collect kernel logs...
Trying to collect modinfo... Trying to collect mount points and volume information...
Trying to collect SELinux status...
Trying to collect iptables information...
Trying to collect ipvs information...

Trying to collect nftables information... skipping nftable info: if using nftables install 'nft' utility and try again
Trying to collect installed packages...
Trying to collect active system services...