[Release-1.27] - rke2-killall.sh script fails to kill containers when run on narrow terminal

[brandond]

Backport fix for rke2-killall.sh script fails to kill containers when run on narrow terminal

• rke2-killall.sh script fails to kill containers when run on narrow terminal #6024

[fmoral2]

Validated on Version:

-$  rke2 version v1.27.14+dev.916f7501 (916f7501c7390092d1d1fd6adf112813e406b7af)
 

Environment Details

Infrastructure
Cloud EC2 instance

Node(s) CPU architecture, OS, and Version:
rhel
AMD

Cluster Configuration:
-1 node server

Steps to validate the fix

1. Install rke2
2. export COLUMNS=40 to simulate a narrow terminal
3. Run killall script
4. Validate that will not kill all the processes
5. Run killall script again
6. Validate that will kill all the processes

Reproduction Issue:

 rke2 version v1.30.1 (c727b365ea6cb0d8b70fdcaac648d79950b9591b)

getshims() {
     COLUMNS=40  ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'rke2/data/[^/]*/bin/containerd-shim' | cut -f1
}

$ sudo  /usr/local/bin/rke2-killall.sh


 AFTER script some processes are still running  -------

 ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'rke2/data/[^/]*/bin/containerd-shim' | cut -f1
102983
103085
103335
103672
103701
103763
103936
103983
104014
104148
104151
104198
104634
104645
104657
104881
105405
105984

Validation Results:

 
 
$ sudo  /usr/local/bin/rke2-killall.sh
+ killtree 102248 102507 102668 102673 102703 103365 104968 118133 118297 118395 118471 118540 118577 119185 119337 119409 119883 119971



$  ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'rke2/data/[^/]*/bin/containerd-shim' | cut -f1
<EMPTY>