kubectl-debug-image is based on https://github.com/nicolaka/netshoot
in addition, below packages are included
- vmstat
- iostat
- pidstat
- mpstat
- htop
- sar
- perf
- dool
mainly used as debug container from https://github.com/aylei/kubectl-debug
dool is a good choice to overlook the whole system
$ dool-all
$ dool-cpu
$ dool-mem
$ dool-ioutilization
# whole system (1 - id)
$ vmstat
# per CPU (1 - %idle)
$ mpstat -P ALL
# per process (%CPU)
$ pidstat
$ dool-cpu
# per thread (%CPU)
$ pidstat -tsaturation
# whole system (r)
$ vmstatutilization
# whole system (Swap/Mem)
$ free -m
# per process (VIRT/RES)
$ htopsaturation
# whole system (si/so)
$ vmstat
# per process
# dmesg is not acceptable
# $ dmesg | grep killed
$ dool-memutilization
# per network interface (RX/TX)
$ ip -s linksaturation
# per network interface (dropped/overrun)
$ ip -s linkutilization
# per block device (%used)
$ iostat -xz
# per process
# iotop is not acceptable
# $ iotopsaturation
# per process (avgqu-sz,await)
$ iostat -xzutilization
$ swaponsaturation
$ df -h$ curl -IL google.com
$ drill -V 5 google.com @8.8.8.8 A
$ ip r
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