Check_MK Agent Update Script

update_check_mk_agent.sh

#!/bin/bash

# this script works with the latest version of Check_MK. Tested using Raw 1.6.0b7 on Debian and RedHat.

# be sure that curl is installed!
# apt install -y curl
# yum install -y curl

# use the script with these steps:
# curl -Os -H 'Cache-Control: no-cache' https://gist.githubusercontent.com/jpylypiw/f55352de920b75cccbe6e50c6ad4b4cd/raw/update_check_mk_agent.sh
# bash update_check_mk_agent.sh -h myservername -i/s myinstance/mysite [-p http/https] [-d /usr/lib/check_mk_agent/plugins]

# Example:
# (sudo) bash update_check_mk_agent.sh -h test.example.com -s test -p http -d /usr/local/lib/check_mk_agent/plugins
# (sudo) bash update_check_mk_agent.sh -h test.example.com -i test

CHECK_MK_HOST="myservername"
CHECK_MK_INSTANCE="myinstance"
CHECK_MK_PROTOCOL="https"
CHECK_MK_PLUGIN_DIR="/usr/lib/check_mk_agent/plugins"

if [ "$EUID" -ne 0 ]; then
    echo "This script must be run as root. Try again using sudo or log in as root user."
    exit 1
fi

while getopts "h:i:p:d:s:" opt; do
    case ${opt} in
    h)
        CHECK_MK_HOST=$OPTARG
        ;;
    i)
        CHECK_MK_INSTANCE=$OPTARG
        ;;
    s)
        CHECK_MK_INSTANCE=$OPTARG
        ;;
    p)
        CHECK_MK_PROTOCOL=$OPTARG
        ;;
    d)
        CHECK_MK_PLUGIN_DIR=$OPTARG
        ;;
    *)
        echo "Usage: cmd -h -i [-p] [-d]"
        ;;
    esac
done

OS=

if grep 'Debian' /etc/issue >/dev/null 2>&1; then
    OS=debian
fi

if grep 'Debian' /etc/os-release >/dev/null 2>&1; then
    OS=debian
fi

if grep 'Ubuntu' /etc/issue >/dev/null 2>&1; then
    OS=debian
fi

if grep 'ubuntu' /etc/os-release >/dev/null 2>&1; then
    OS=debian
fi

if grep 'CentOS' /etc/issue >/dev/null 2>&1; then
    OS=rhel
fi

if grep 'CentOS' /etc/os-release >/dev/null 2>&1; then
    OS=rhel
fi

if grep 'Red' /etc/issue >/dev/null 2>&1; then
    OS=rhel
fi

if [ ! $OS ]; then
    echo "Could not detect OS"
    exit 1
fi
echo "OS: $OS"

if [ "$OS" == "debian" ]; then
    echo "Downloading Agent Package"
    FILENAME=$(curl -s "$CHECK_MK_PROTOCOL"://"$CHECK_MK_HOST"/"$CHECK_MK_INSTANCE"/check_mk/agents/ | grep -oP "check-mk-agent\w[a-z\-\_0-9\.]+" | head -1)
    URL=$CHECK_MK_PROTOCOL"://$CHECK_MK_HOST/$CHECK_MK_INSTANCE/check_mk/agents/"$FILENAME
    curl -Os "$URL"
    dpkg -i "$FILENAME"
    rm "$FILENAME"

    cd "$CHECK_MK_PLUGIN_DIR" || exit 1
    echo "updating plugins"
    for filename in $(find . -type f | cut -c 3-); do
        echo "downloading $filename from check_mk server"
        curl -sO "$CHECK_MK_PROTOCOL"://"$CHECK_MK_HOST"/"$CHECK_MK_INSTANCE"/check_mk/agents/plugins/"$filename"
        chmod +x "$filename"
    done
fi

if [ "$OS" == "rhel" ]; then
    echo "Downloading Agent Package"
    FILENAME=$(curl -s "$CHECK_MK_PROTOCOL"://"$CHECK_MK_HOST"/"$CHECK_MK_INSTANCE"/check_mk/agents/ | grep -oP "check-mk-agent\-\w[a-z\-0-9\.]+" | head -1)
    URL=$CHECK_MK_PROTOCOL"://$CHECK_MK_HOST/$CHECK_MK_INSTANCE/check_mk/agents/"$FILENAME
    curl -Os "$URL"
    rpm --install --quiet --replacefiles "$FILENAME"
    rm "$FILENAME"

    cd "$CHECK_MK_PLUGIN_DIR" || exit 1
    echo "updating plugins"
    for filename in $(find . -type f | cut -c 3-); do
        echo "downloading $filename from check_mk server"
        curl -sO "$CHECK_MK_PROTOCOL"://"$CHECK_MK_HOST"/"$CHECK_MK_INSTANCE"/check_mk/agents/plugins/"$filename"
        chmod +x "$filename"
    done
fi

echo 'Complete'

Hi,

I am using this script for a Red Hat distro, and it keeps erroring out with

:: Downloading Agent Package
curl: Remote file name has no length!
curl: try 'curl --help' or 'curl --manual' for more information
rpm: no packages given for install
rm: missing operand
Try 'rm --help' for more information.
chmod: cannot access ‘*’: No such file or directory
:: Complete

Any suggestions as to why this is the case?

Hi there! I changed the script so you won't have any issues any more.
You need to have the latest version of Check_MK installed to run the script. The latest version does not need xinetd or gdebi anymore.
For a command line arguments example look at the comment at the first lines.