Steem Admin Tools / Smooth Server Update & Reboot Script

Description

---

This is an update of my 'Smooth Server Reboot' bash script. It is now able to wait for the exit of multiple processes, update & clean up the linux system and reboot the machine after confirming with [ENTER].

I highly recommend to never update your server with apt update before closing any running steemd processes! If your node runs in a docker image (not as service) and apt updates your docker version, all running processes inside the container may be killed immediately, which eventually will corrupt the RocksDB files.

With this updated version the script will ensure to execute the mentioned tasks always in the right order.

Bash Script

---

#!/bin/bash

proc_names=("node" "steemd")

function showInfo()
{
    printf "\n$1\n"
    printf "%*s\n\n" "${COLUMNS:-$(tput cols)}" '' | tr ' ' =
}

function installUpdates()
{
    apt update && apt upgrade -y
}

function cleanSystem()
{
    apt autoremove -y
}

function checkProcesses()
{
    proc_ids=($(pidof $1))
    proc_count=${#proc_ids[@]}
}

function closeProcesses()
{
    proc_name=$1

    checkProcesses $proc_name
    for (( i=0; i<$proc_count; i++ ));
    do
        echo "Found process with id: ${proc_ids[$i]}. Sending SIGINT..."
        kill -SIGINT ${proc_ids[$i]}
    done

    while [ $proc_count -gt 0 ]
    do
        echo "$proc_count process(es) still running. Waiting for close..."
        sleep 3
        checkProcesses $proc_name
    done

    echo "No running processes found."
}

clear

for (( p=0; p<${#proc_names[@]}; p++ ));
do
    proc_name=${proc_names[$p]}
    showInfo "Closing '$proc_name' processes..."
    closeProcesses $proc_name
done

showInfo "Running updates..."
installUpdates

showInfo "Cleaning system..."
cleanSystem

showInfo "Rebooting system..."
read -s -N 1 -p "Press [ENTER] to reboot the system or any other key to abort..." key
if [[ $key == $'\x0a' ]];
then
    printf "\nRebooting...\n\n"
    reboot
else
    printf "\nReboot cancelled.\n\n"
fi

---

Just store the script in a file 'smooth_update_and_reboot.sh' on your server, add execution rights with
chmod +x smooth_update_and_reboot.sh
and you are good to go.

In its current state the script will close all node and steemd processes before updating the system. Of course, the processes to be closed can be changed simply by defining them in the line
proc_names=("node" "steemd").

The script can also be downloaded directly here:
steemworld.org/dl/smooth_update_and_reboot.sh

I hope this helps Steem witnesses and node maintainers in general to be able to update and reboot their system more smoothly :)

Terminal Output

---

Steem On!

---

_{If you like what I do and you want me to be your Steem witness,
please vote for @steemchiller on steemit.com/~witnesses or steemworld.org/witnesses.}