mirror of https://github.com/limosek/zaf.git
467 lines
11 KiB
Bash
467 lines
11 KiB
Bash
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# Hardcoded variables
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ZAF_VERSION="1.3"
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ZAF_GITBRANCH="master"
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ZAF_URL="https://github.com/limosek/zaf"
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ZAF_RAW_URL="https://raw.githubusercontent.com/limosek/zaf"
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############################################ Common routines
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zaf_msg() {
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echo $@
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}
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zaf_trc() {
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[ "$ZAF_DEBUG" -ge "3" ] && logger -s -t zaf -- $@
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}
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zaf_dbg() {
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[ "$ZAF_DEBUG" -ge "2" ] && logger -s -t zaf -- $@
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}
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zaf_wrn() {
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[ "$ZAF_DEBUG" -ge "1" ] && logger -s -t zaf -- $@
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}
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zaf_err() {
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logger -s -t zaf -- $@
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logger -s -t zaf "Exiting with error!"
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exit 1
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}
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# Help option
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# $1 - key
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# $2 -
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zaf_hlp() {
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local kl
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local dl
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local cols
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cols=$COLUMNS
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[ -z "$cols" ] && cols=120
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kl=$(expr $cols / 3)
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dl=$(expr $cols - $kl)
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printf %-${kl}s%-${dl}s%b "$1" "$2" "\n"
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}
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zaf_version(){
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echo $ZAF_VERSION
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}
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# Fetch url to stdout
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# $1 url
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# It supports real file, file:// and other schemes known by curl
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zaf_fetch_url() {
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local scheme
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local uri
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local insecure
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local out
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if zaf_fromcache "$1"; then
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return
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fi
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scheme=$(echo $1|cut -d ':' -f 1)
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uri=$(echo $1|cut -d '/' -f 3-)
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if [ "$1" = "$scheme" ]; then
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cat "$1"
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fi
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case $scheme in
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http|https|ftp|file)
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[ "$scheme" != "file" ] && [ -n "$ZAF_OFFLINE" ] && zaf_err "Cannot download $1 in offline mode!"
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[ "${ZAF_CURL_INSECURE}" = "1" ] && insecure="-k"
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zaf_dbg curl $insecure -f -s -L -o - $1
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curl $insecure -f -s -L -o - "$1" | zaf_tocache_stdin "$1" 120
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;;
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esac
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}
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# Find and replace string
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zaf_far(){
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local f
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local t
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local sedcmd="sed"
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i=1
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while [ "$i" -lt "$#" ];
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do
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eval f=\$${i}
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i=$(expr $i + 1)
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eval t=\$${i}
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i=$(expr $i + 1)
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sedcmd="$sedcmd -e 's~$f~$t~g'"
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done
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eval $sedcmd
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}
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# Limit concurrent processes or continue
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zaf_bglimit(){
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local maxbg
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local maxnumber
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local cnumber
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[ -z "$BASH_VERSION" ] && { zaf_dbg "Job server not available. Use bash!"; return 1; }
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if [ $# -eq 0 ] ; then
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maxbg=5
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else
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maxbg=$1
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fi
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maxnumber=$((0 + ${1:-0}))
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while true; do
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cnumber=$(jobs | wc -l)
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if [ $cnumber -lt $maxnumber ]; then
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break
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fi
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zaf_dbg "Limiting next job due to $maxbg limit of bg jobs"
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sleep 1
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done
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}
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# Initialises discovery function
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zaf_discovery_begin(){
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cat <<EOF
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{
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"data":[
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EOF
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}
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# Add row(s) to discovery data
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zaf_discovery_add_row(){
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local rows
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local row
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rows=$1
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row=$2
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shift;shift
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echo " {"
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while [ -n "$1" ]; do
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echo -n ' "'$1'":"'$2'" '
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shift;shift
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if [ -n "$1" ]; then
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echo ","
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else
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echo ""
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fi
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done
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if [ "$row" -lt "$rows" ]; then
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echo " },"
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else
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echo " }"
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fi
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}
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# Dumps json object
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zaf_discovery_end(){
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cat <<EOF
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]
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}
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EOF
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}
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# Read standard input as discovery data. Columns are divided by space.
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# Arguments are name of variables to discovery.
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# Dumps json to stdout
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zaf_discovery(){
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local tmpfile
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local rows
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local a b c d e f g h i j row
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tmpfile="${ZAF_TMP_DIR}/disc$$"
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cat >$tmpfile
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rows=$(wc -l <$tmpfile)
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local a b c d e f g h i j;
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zaf_discovery_begin
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row=1
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while read a b c d e f g h i j; do
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zaf_discovery_add_row "$rows" "$row" "$1" "${1:+${a}}" "$2" "${2:+${b}}" "$3" "${3:+${c}}" "$4" "${4:+${d}}" "$5" "${5:+${e}}" "$6" "${6:+${f}}" "$7" "${7:+${g}}" "$8" "${8:+${h}}" "$9" "${9:+${i}}"
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row=$(expr $row + 1)
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done <$tmpfile
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zaf_discovery_end
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rm -f $tmpfile
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}
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############################################ Zaf internal routines
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# Restart zabbix agent
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zaf_restart_agent() {
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zaf_wrn "Restarting agent (${ZAF_AGENT_RESTART})"
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${ZAF_AGENT_RESTART} || zaf_err "Cannot restart Zabbix agent (${ZAF_AGENT_RESTART}). Try $ZAF_AGENT_BIN -f !";
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}
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# Check if zaf.version item is populated
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zaf_check_agent_config() {
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zaf_restart_agent
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${ZAF_AGENT_BIN} -t zaf.version
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}
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# Update repo
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zaf_update_repo() {
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[ "$ZAF_GIT" != 1 ] && { zaf_err "Git is disabled or is not installed. Exiting."; }
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if [ -z "${ZAF_REPO_GITURL}" ] || [ -z "${ZAF_REPO_DIR}" ]; then
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zaf_err "This system is not configured for git repository."
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else
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[ ! -d "${ZAF_REPO_DIR}" ] && git clone "${ZAF_REPO_GITURL}" "${ZAF_REPO_DIR}"
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(cd ${ZAF_REPO_DIR} && git pull)
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fi
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}
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# Construct url from plugin name
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# It can be http[s]://url
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# /path (from file)
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# name (to try from repo)
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zaf_get_plugin_url() {
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local url
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if echo "$1" | grep -q '/'; then
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url="$1" # plugin with path - from directory
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else
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if echo "$1" | grep -q ^http; then
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url="$1" # plugin with http[s] url
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else
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if [ -d "${ZAF_REPO_DIR}/$1" ]; then
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url="${ZAF_REPO_DIR}/$1"
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else
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if [ -n "${ZAF_PREPACKAGED_DIR}" ] && [ -d "${ZAF_PREPACKAGED_DIR}/$1" ]; then
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url="${ZAF_PREPACKAGED_DIR}/$1"
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else
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if [ -n "${ZAF_REPO_URL}" ]; then
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url="${ZAF_REPO_URL}/$1"
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else
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zaf_err "Cannot find plugin $1"
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fi
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fi
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fi
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fi
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fi
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echo $url
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}
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# $1 - control
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zaf_plugin_info() {
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local control="$1"
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! [ -f "$control" ] && zaf_err "Control file $control not found."
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plugin=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Plugin)
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pdescription=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_moption Description)
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pmaintainer=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Maintainer)
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pversion=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Version)
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purl=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Url)
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phome=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Home)
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pitems=$(zaf_ctrl_get_items <"${control}")
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echo
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echo -n "Plugin '$plugin' "; [ -n "$pversion" ] && echo -n "version ${pversion}"; echo ":"
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echo "$pdescription"; echo
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[ -n "$pmaintainer" ] && echo "Maintainer: $pmaintainer"
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[ -n "$purl" ] && echo "Url: $purl"
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[ -n "$phome" ] && echo "Home: $phome"
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echo
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if zaf_is_plugin "$(basename $plugin)"; then
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echo -n "Defined items: "; zaf_list_plugin_items $plugin
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echo -n "Test items: "; zaf_list_plugin_items $plugin test
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echo -n "Precache items: "; zaf_list_plugin_items $plugin precache
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else
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echo "Items: $pitems"
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fi
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echo
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}
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# Prepare plugin into dir
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# $1 is url, directory or plugin name (will be searched in default plugin dir).
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# $2 is directory to prepare.
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zaf_prepare_plugin() {
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local url
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local plugindir
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local control
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url=$(zaf_get_plugin_url "$1")/control.zaf || exit $?
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plugindir="$2"
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control=${plugindir}/control.zaf
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zaf_install_dir "$plugindir"
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zaf_dbg "Fetching control file from $url ..."
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if zaf_fetch_url "$url" >"${control}"; then
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zaf_ctrl_check_deps "${control}"
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else
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zaf_err "prepare_plugin: Cannot fetch or write control file $control from url $url!"
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fi
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}
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zaf_install_plugin() {
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local url
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local plugin
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local plugindir
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local control
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local version
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if zaf_prepare_plugin "$1" "${ZAF_TMP_DIR}/plugin"; then
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url=$(zaf_get_plugin_url "$1")
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control="${ZAF_TMP_DIR}/plugin/control.zaf"
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plugin=$(zaf_ctrl_get_global_option $control Plugin)
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version=$(zaf_ctrl_get_global_option $control Version)
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plugindir="${ZAF_PLUGINS_DIR}"/$plugin
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if [ -n "$plugin" ] && zaf_prepare_plugin "$1" $plugindir; then
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zaf_wrn "Installing plugin $plugin version $version"
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zaf_dbg "Source url: $url, Destination dir: $plugindir"
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control=${plugindir}/control.zaf
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[ "$ZAF_DEBUG" -gt 1 ] && zaf_plugin_info "${control}"
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zaf_ctrl_check_deps "${control}"
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zaf_ctrl_install "$url" "${control}" "${plugindir}"
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zaf_ctrl_sudo "$plugin" "${control}" "${plugindir}"
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zaf_ctrl_cron "$plugin" "${control}" "${plugindir}"
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zaf_ctrl_generate_items_cfg "${control}" "${plugin}" \
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| zaf_far '{PLUGINDIR}' "${plugindir}" >${ZAF_AGENT_CONFIGD}/zaf_${plugin}.conf
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zaf_ctrl_generate_extitems_cfg "${control}" "${plugin}"
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zaf_dbg "Generated ${ZAF_AGENT_CONFIGD}/zaf_${plugin}.conf"
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else
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zaf_err "Cannot install plugin '$plugin' to $plugindir!"
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fi
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else
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zaf_err "Cannot prepare plugin $1"
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fi
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}
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# List installed plugins
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# $1 - plugin
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zaf_list_plugins() {
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local cfile
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local plugin
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ls -1 ${ZAF_PLUGINS_DIR} | while read p; do
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zaf_is_plugin "$(basename $p)" && echo $p
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done
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}
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zaf_is_plugin() {
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[ -d "$ZAF_PLUGINS_DIR/$1" ] && [ -f "$ZAF_PLUGINS_DIR/$1/control.zaf" ] && return
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false
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}
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zaf_discovery_plugins() {
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zaf_list_plugins | zaf_discovery '{#PLUGIN}'
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}
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# $1 plugin
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# $2 ctrl_option
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zaf_plugin_option() {
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local plugindir
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local cfile
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if [ -z "$1" ]; then
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zaf_err "Missing plugin name.";
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fi
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if zaf_is_plugin "$1"; then
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plugindir="${ZAF_PLUGINS_DIR}/$1"
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cfile="$plugindir/control.zaf"
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zaf_ctrl_get_global_option $cfile $2
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else
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zaf_err "Plugin $1 not installed."
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fi
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}
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zaf_plugin_version() {
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zaf_plugin_option "$1" Version
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}
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zaf_plugin_maintainer() {
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zaf_plugin_option "$1" Maintainer
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}
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zaf_plugin_url() {
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zaf_plugin_option "$1" Url
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}
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zaf_plugin_web() {
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zaf_plugin_option "$1" Web
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}
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zaf_plugin_template_url() {
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echo $(zaf_plugin_option "$1" Url)/template.xml
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}
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# $1 plugin
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# $2 test to get test items, precache to get items to precache
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zaf_list_plugin_items() {
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local items
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local i
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local p
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local key
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local testparms
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local precache
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if ! zaf_is_plugin "$1"; then
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zaf_err "Missing plugin name or plugin $1 unknown. ";
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fi
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plugindir="${ZAF_PLUGINS_DIR}/$1"
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cfile="$plugindir/control.zaf"
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items=$(zaf_ctrl_get_items <$cfile)
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for i in $items; do
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p=$(zaf_ctrl_get_item_option $cfile $i "Parameters")
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testparms=$(zaf_ctrl_get_item_option $cfile $i "Testparameters")
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precache=$(zaf_ctrl_get_item_option $cfile $i "Precache")
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if [ -n "$p" ]; then
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if [ -n "$testparms" ] && [ "$2" = "test" ]; then
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for tp in $testparms; do
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echo -n "$1.$i[$tp] "
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done
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else
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if [ -n "$precache" ] && [ "$2" = "precache" ]; then
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for tp in $precache; do
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echo -n "$1.$i[$tp] "
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done
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fi
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[ "$2" != "test" ] && key="$1.$i[]"
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fi
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else
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key="$1.$i"
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fi
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[ "$2" != "precache" ] && echo -n "$key "
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done
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echo
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}
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zaf_list_items() {
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for p in $(zaf_list_plugins); do
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echo $p: $(zaf_list_plugin_items $p)
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done
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}
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zaf_get_item() {
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if which zabbix_get >/dev/null; then
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zabbix_get -s localhost -k "$1" || zaf_wrn "Cannot reach agent on localhost. Please localhost to Server list."
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return 11
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else
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zaf_wrn "Please install zabbix_get binary to check items over network."
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return 11
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fi
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}
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zaf_test_item() {
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$ZAF_AGENT_BIN -t "$1"
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}
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zaf_precache_item() {
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cmd=$(grep "^UserParameter=$item" $ZAF_AGENT_CONFIGD/zaf*.conf | cut -d ',' -f 2- | sed -e "s/_cache/_nocache/")
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zaf_wrn "Precaching item $item[$(echo $*| tr ' ' ',')] ($cmd)"
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eval $cmd
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}
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zaf_remove_plugin() {
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! zaf_is_plugin $1 && { zaf_err "Plugin $1 not installed!"; }
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zaf_wrn "Removing plugin $1 (version $(zaf_plugin_version $1))"
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rm -rf ${ZAF_PLUGINS_DIR}/$1
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rm -f ${ZAF_AGENT_CONFIGD}/zaf_$1.conf ${ZAF_CROND}/zaf_$1 ${ZAF_SUDOERSD}/zaf_$1
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}
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zaf_tolower() {
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tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'
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}
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zaf_toupper() {
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tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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}
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# Return simplified key with discarded special chars.
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zaf_stripctrl() {
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echo $1 | tr '[]*&;:.-' '________'
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}
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# Unescape string on stdin
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# $1 - list of chars to unescape
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zaf_strunescape() {
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sed -e 's#\\\(['"$1"']\)#\1#g'
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}
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# Escape string on stdin
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# $1 - list of chars to escape
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zaf_strescape() {
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sed -e 's#\(['"$1"']\)#\\\1#g'
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}
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