Add script 'check-connectivity.sh'.
This commit is contained in:
parent
8c8cbba378
commit
67b6587917
479
check-connectivity.sh
Executable file
479
check-connectivity.sh
Executable file
@ -0,0 +1,479 @@
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#!/usr/bin/env bash
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script_name="$(basename $(realpath $0))"
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working_dir="$(dirname $(realpath $0))"
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conf_file="${working_dir}/conf/${script_name%%.*}.conf"
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LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
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log_file="${LOCK_DIR}/${script_name%%.*}.log"
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PROBLEM_FOUND=false
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LINK_UP=false
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RESTART_CHECK_FILE="/tmp/${script_name%%.*}.NEED-RESTART"
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# ----------
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# Base Function(s)
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# ----------
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clean_up() {
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# Perform program exit housekeeping
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rm -rf "$LOCK_DIR"
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blank_line
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exit $1
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}
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usage() {
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[[ -n "$1" ]] && error "$1"
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[[ $terminal ]] && echo -e "
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\033[1mUsage:\033[m
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$(basename $0)
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\033[1mDescription\033[m
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Script checks presence of some basic network settings and do some basic connectivity
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tests. If fundamental problems found, then restart machine if this i not the firts time.
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If this i the first time, file \033[1m$RESTART_CHECK_FILE\033[m is created.
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\033[1mOptions\033[m
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No Options present
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\033[1mFiles\033[m
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$conf_file: Configuration file
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\033[1mExample:\033[m
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Chech connectivity of this machine
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$(basename $0)
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"
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clean_up 1
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}
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echononl(){
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if $terminal ; then
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echo X\\c > /tmp/shprompt$$
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if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
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echo -e -n " $*\\c" 1>&2
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else
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echo -e -n " $*" 1>&2
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fi
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rm /tmp/shprompt$$
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fi
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}
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error (){
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echo ""
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if $terminal ; then
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echo -e " [ \033[31m\033[1mError\033[m ] $*"
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else
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echo " [ Error ] $*"
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fi
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echo ""
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}
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warn (){
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echo ""
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if $terminal ; then
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echo -e " [ \033[33m\033[1mWarn\033[m ] $*"
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else
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echo " [ Warn ] $*"
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fi
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echo ""
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}
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info (){
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if $terminal ; then
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echo ""
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echo -e " [ \033[32m\033[1mInfo\033[m ] $*"
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echo ""
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fi
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}
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echo_ok() {
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if $terminal ; then
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echo -e "\033[75G[ \033[32mok\033[m ]"
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fi
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}
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echo_failed(){
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if $terminal ; then
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echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
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fi
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}
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echo_skipped() {
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if $terminal ; then
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echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
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fi
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}
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trim() {
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local var="$*"
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var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
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var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
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echo -n "$var"
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}
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blank_line() {
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if $terminal ; then
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echo ""
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fi
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}
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# Check if at least one interface has physical link is up
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#
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online() {
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# Call this functionin a subshell to avoid exiting main programm
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#
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# Example:
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# $(online) && echo -e '\033[32m\033[1mOnline\033[m' || echo -e '\033[31m\033[1mOFFLINE\033[m'
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#
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find /sys/class/net/ -maxdepth 1 -mindepth 1 \
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! -name "*lo*" \
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! -name "*tun*" \
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! -name "*veth*" \
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-exec sh -c 'cat "$0"/carrier 2>&1' {} \; | grep -q -E '^1$' && exit 0
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# using ethtool also works:
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#
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#-exec sh -c 'ethtool $(basename "$0") 2>&1' {} \; | grep 'ink detected' | grep -i -q 'yes' && exit 0
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}
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# ----------
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# - Jobhandling
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# ----------
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# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
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# -
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trap clean_up SIGHUP SIGINT SIGTERM
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# - Create lock directory '$LOCK_DIR"
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#
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mkdir "$LOCK_DIR"
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# ----------
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# - Some checks ..
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# ----------
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# - Running in a terminal?
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# -
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if [[ -t 1 ]] ; then
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terminal=true
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else
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terminal=false
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fi
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# - Print help?
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# -
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if [[ "$(trim $*)" = "-h" ]] || [[ "$(trim $*)" = "--help" ]] ; then
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usage
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fi
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# ==========
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# - Begin Main Script
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# ==========
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# ----------
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# - Headline
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# ----------
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if $terminal ; then
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echo ""
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echo -e "\033[1m----------\033[m"
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echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
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echo -e "\033[1m----------\033[m"
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echo ""
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fi
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# ----------
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# Read Configurations from $conf_file
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# ----------
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# - Give your default values here
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# -
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DEFAULT_IPV6_PRESENT=true
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DEFAULT_CHECK_HOSTS="www.oopen.de www.google.de www.heise.de www.debian.org"
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echononl "Load Configurations from file '$(basename "$conf_file")'."
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if [[ -f "$conf_file" ]]; then
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source "$conf_file"
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echo_ok
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else
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echo_skipped
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warn "No configuration file found. Loading script default values.."
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fi
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[[ -z "$IPV6_PRESENT" ]] && IPV6_PRESENT="$DEFAULT_IPV6_PRESENT"
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[[ -z "$DNS_CHECK_HOSTS" ]] && DNS_CHECK_HOSTS="$DEFAULT_CHECK_HOSTS"
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[[ -z "$HTTPS_CHECK_HOSTS" ]] && HTTPS_CHECK_HOSTS="$DEFAULT_CHECK_HOSTS"
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blank_line
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echononl "Check if at least one interface has physical link is up"
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if ! $(online) ; then
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echo_failed
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PROBLEM_FOUND=true
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else
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echo_ok
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LINK_UP=true
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fi
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if $LINK_UP ; then
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info 'Machine has at least one interface with physical link is up.'
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else
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error 'Machine is OFFLINE'
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if [[ -f "$RESTART_CHECK_FILE" ]] ; then
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_file_mod_time=$(date --utc --reference=$RESTART_CHECK_FILE +%s)
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_now=$(date +%s)
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_delta=$(($_now-$_file_mod_time))
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echo "_delta=: $_delta"
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if [[ $_delta -gt 3900 ]] ; then
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touch "$RESTART_CHECK_FILE"
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else
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/sbin/reboot -f
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fi
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else
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touch "$RESTART_CHECK_FILE"
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fi
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clean_up 1
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fi
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# ---
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# Routing ok?
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# ---
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# Determin IPv4 default gateway(s)
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#
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DEFAULT_GW_4="$(/sbin/ip -4 route | awk '/default/ { print $3 }')"
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if [[ -z "$DEFAULT_GW_4" ]] ; then
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DEFAULT_GW_4="$(/sbin/ip -4 route | awk '/nexthop/ { print $3 }')"
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fi
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declare -a DEFAULT_GW_4_ARR=()
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for _ip in $DEFAULT_GW_4 ; do
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DEFAULT_GW_4_ARR+=("$_ip")
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done
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echononl "Check if IPv4 default route is set.."
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if [[ ${#DEFAULT_GW_4_ARR[@]} -gt 0 ]] ; then
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echo_ok
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if [[ ${#DEFAULT_GW_4_ARR[@]} -eq 1 ]] ; then
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info "Default IPv4 Gateway(s): ${DEFAULT_GW_4_ARR[@]}"
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else
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msg="Default IPv4 Gateway(s): ${DEFAULT_GW_4_ARR[0]}"
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for index in "${!DEFAULT_GW_4_ARR[@]}"; do
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[[ $index -eq 0 ]] && continue
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msg="$msg
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${DEFAULT_GW_4_ARR[$index]}"
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done
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info "$msg"
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fi
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else
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echo_failed
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PROBLEM_FOUND=true
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error "No default route IPV4is set."
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if [[ -f "$RESTART_CHECK_FILE" ]] ; then
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_file_mod_time=$(date --utc --reference=$RESTART_CHECK_FILE +%s)
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_now=$(date +%s)
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_delta=$(($_now-$_file_mod_time))
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echo "_delta=: $_delta"
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if [[ $_delta -gt 3900 ]] ; then
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touch "$RESTART_CHECK_FILE"
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else
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/sbin/reboot -f
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fi
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else
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touch "$RESTART_CHECK_FILE"
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fi
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clean_up 1
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fi
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# Determin IPv6 default gateway(s)
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#
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if $IPV6_PRESENT ; then
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DEFAULT_GW_6="$(/sbin/ip -6 route | awk '/default/ { print $3 }')"
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declare -a DEFAULT_GW_6_ARR=()
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for _ip in $DEFAULT_GW_6 ; do
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DEFAULT_GW_6_ARR+=("$_ip")
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done
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echononl "Check if IPv6 default route is set.."
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if [[ ${#DEFAULT_GW_6_ARR[@]} -gt 0 ]] ; then
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echo_ok
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if [[ ${#DEFAULT_GW_6_ARR[@]} -eq 1 ]] ; then
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info "Default IPv6 Gateway(s): ${DEFAULT_GW_6_ARR[@]}"
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else
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msg="Default IPv6 Gateway(s): ${DEFAULT_GW_6_ARR[0]}"
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for index in "${!DEFAULT_GW_6_ARR[@]}"; do
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[[ $index -eq 0 ]] && continue
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msg="$msg
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${DEFAULT_GW_6_ARR[$index]}"
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done
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info "$msg"
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fi
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else
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echo_failed
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warn "No default route IPv6 is set."
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fi
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fi
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# ---
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# Nameservice ok?
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# ---
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FOUND_NS_PROBLEM=true
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# Check if nameserver entry at /etc/resolv.conf ist present
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#
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echononl "Check if nameserver entry at /etc/resolv.conf ist present.."
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FIRST_NS="$(cat /etc/resolv.conf | awk '/nameserver/ {print $2}' | awk 'NR == 1 {print; exit}')"
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if [[ -n "$FIRST_NS" ]] ; then
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echo_ok
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FOUND_NS_PROBLEM=false
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info "Found nameserver \033[1m$FIRST_NS\033[m at '/etc/resolv.conf'."
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else
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echo_failed
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error "No nameserverentry at '/etc/resolv.conf' found."
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fi
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# Check if nameservice works..
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#
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echononl "Check if first nameserver works.."
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if ! $FOUND_NS_PROBLEM ; then
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FOUND_NS_PROBLEM=true
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for _hostname in $DNS_CHECK_HOSTS ; do
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if [[ -n "$(dig +short @$FIRST_NS $_hostname)" ]] ; then
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FOUND_NS_PROBLEM=false
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break
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fi
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done
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if $FOUND_NS_PROBLEM ; then
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echo_failed
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PROBLEM_FOUND=true
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error "First nameserver located at /etc/resolv.conf does not work properly."
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if [[ -f "$RESTART_CHECK_FILE" ]] ; then
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_file_mod_time=$(date --utc --reference=$RESTART_CHECK_FILE +%s)
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_now=$(date +%s)
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_delta=$(($_now-$_file_mod_time))
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echo "_delta=: $_delta"
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if [[ $_delta -gt 3900 ]] ; then
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touch "$RESTART_CHECK_FILE"
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else
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/sbin/reboot -f
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fi
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else
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touch "$RESTART_CHECK_FILE"
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fi
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clean_up 1
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else
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echo_ok
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info "Nameserver works as expected."
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fi
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else
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echo_skipped
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warn "Test was not triggert because of nameserver problems.."
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fi
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# ---
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# Website reachable?
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# ---
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FOUND_CHECK_HOST_PROBLEM=true
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# Check if some websites reachable..
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#
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for _host in $HTTPS_CHECK_HOSTS ; do
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echononl "Check if website \033[1m$_host\033[m is reachable.."
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if ! $FOUND_NS_PROBLEM ; then
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case "$(curl -s --max-time 2 -I $_host | sed 's/^[^ ]* *\([0-9]\).*/\1/; 1q')" in
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[23]) echo_ok
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FOUND_CHECK_HOST_PROBLEM=false
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break
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;;
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5) echo_failed
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error "The web proxy won't let us through"
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;;
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*) echo_failed
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error "Something is wrong with HTTP connections. Go check it."
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;;
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esac
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else
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echo_skipped
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warn "Test was not triggert because of nameserver problems.."
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break
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fi
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done
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if $FOUND_CHECK_HOST_PROBLEM ; then
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PROBLEM_FOUND=true
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if [[ -f "$RESTART_CHECK_FILE" ]] ; then
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_file_mod_time=$(date --utc --reference=$RESTART_CHECK_FILE +%s)
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_now=$(date +%s)
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_delta=$(($_now-$_file_mod_time))
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echo "_delta=: $_delta"
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if [[ $_delta -gt 3900 ]] ; then
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touch "$RESTART_CHECK_FILE"
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else
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/sbin/reboot -f
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fi
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else
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touch "$RESTART_CHECK_FILE"
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fi
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clean_up 1
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fi
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! $PROBLEM_FOUND && rm -f "$RESTART_CHECK_FILE"
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clean_up 0
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33
conf/check-connectivity.conf.sample
Normal file
33
conf/check-connectivity.conf.sample
Normal file
@ -0,0 +1,33 @@
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# -------------------------------------------
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# - Settings for script check-connectivity.sh
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# -------------------------------------------
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# - IPV6_PRESENT
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# -
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# - Possible values: true/false
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# -
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# - Example:
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# - IPV6_PRESENT=false
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# -
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# - Default value: true
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# -
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#IPV6_PRESENT=true
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# - DNS_CHECK_HOSTS
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# -
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# - Blank sepatated list of hostnames checked by lokal nameservice simply
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# - for their ip-addresses
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# -
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# - Defaults to: DNS_CHECK_HOSTS="www.oopen.de www.google.com www.heise.de"
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# -
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#DNS_CHECK_HOSTS="www.oopen.de www.google.com www.heise.de www.debian.org"
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# - HTTPS_CHECK_HOSTS
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# -
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# - Blank sepatated list of websites which will be checked for accessibility
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# -
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# - Defaults to: HTTPS_CHECK_HOSTS="www.oopen.de www.google.com www.heise.de"
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# -
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#HTTPS_CHECK_HOSTS="www.oopen.de www.google.com www.heise.de www.debian.org"
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