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limosek-zaf/lib/plugin.lib.sh

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# Plugin related functions
# Update repo
zaf_update_repo() {
[ "$ZAF_GIT" != 1 ] && { zaf_err "Git is disabled or is not installed. Exiting."; }
if [ -z "${ZAF_REPO_GITURL}" ] || [ -z "${ZAF_REPO_DIR}" ]; then
zaf_err "This system is not configured for git repository."
else
[ ! -d "${ZAF_REPO_DIR}" ] && git clone "${ZAF_REPO_GITURL}" "${ZAF_REPO_DIR}"
(cd ${ZAF_REPO_DIR} && git pull)
fi
}
# Construct url from plugin name
# It can be http[s]://url
# /path (from file)
# name (to try from repo)
zaf_get_plugin_url() {
local url
if echo "$1" | grep -q '/'; then
url="$1" # plugin with path - from directory
else
if echo "$1" | grep -q ^http; then
url="$1" # plugin with http[s] url
else
if [ -d "${ZAF_REPO_DIR}/$1" ]; then
url="${ZAF_REPO_DIR}/$1"
else
if [ -n "${ZAF_PREPACKAGED_DIR}" ] && [ -d "${ZAF_PREPACKAGED_DIR}/$1" ]; then
url="${ZAF_PREPACKAGED_DIR}/$1"
else
if [ -n "${ZAF_REPO_URL}" ]; then
url="${ZAF_REPO_URL}/$1"
else
zaf_err "Cannot find plugin $1"
fi
fi
fi
fi
fi
echo $url
}
# $1 - control
zaf_plugin_info() {
local control="$1"
! [ -f "$control" ] && zaf_err "Control file $control not found."
plugin=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Plugin)
pdescription=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_moption Description)
pmaintainer=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Maintainer)
pversion=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Version)
purl=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Url)
phome=$(zaf_ctrl_get_global_block <"${control}" | zaf_block_get_option Home)
pitems=$(zaf_ctrl_get_items <"${control}")
echo
echo -n "Plugin '$plugin' "; [ -n "$pversion" ] && echo -n "version ${pversion}"; echo ":"
echo "$pdescription"; echo
[ -n "$pmaintainer" ] && echo "Maintainer: $pmaintainer"
[ -n "$purl" ] && echo "Url: $purl"
[ -n "$phome" ] && echo "Home: $phome"
echo
if zaf_is_plugin "$(basename $plugin)"; then
echo -n "Defined items: "; zaf_list_plugin_items $plugin
echo -n "Test items: "; zaf_list_plugin_items $plugin test
echo -n "Precache items: "; zaf_list_plugin_items $plugin precache
else
echo "Items: $pitems"
fi
echo
}
# Prepare plugin into dir
# $1 is url, directory or plugin name (will be searched in default plugin dir).
# $2 is directory to prepare.
zaf_prepare_plugin() {
local url
local plugindir
local control
url=$(zaf_get_plugin_url "$1")/control.zaf || exit $?
plugindir="$2"
control=${plugindir}/control.zaf
zaf_install_dir "$plugindir"
zaf_dbg "Fetching control file from $url ..."
if zaf_fetch_url "$url" >"${control}"; then
zaf_ctrl_check_deps "${control}"
else
zaf_err "prepare_plugin: Cannot fetch or write control file $control from url $url!"
fi
}
zaf_install_plugin() {
local url
local plugin
local plugindir
local control
local version
if zaf_prepare_plugin "$1" "${ZAF_TMP_DIR}/plugin"; then
url=$(zaf_get_plugin_url "$1")
control="${ZAF_TMP_DIR}/plugin/control.zaf"
plugin=$(zaf_ctrl_get_global_option $control Plugin)
version=$(zaf_ctrl_get_global_option $control Version)
plugindir="${ZAF_PLUGINS_DIR}"/$plugin
if [ -n "$plugin" ] && zaf_prepare_plugin "$1" $plugindir; then
zaf_wrn "Installing plugin $plugin version $version"
zaf_dbg "Source url: $url, Destination dir: $plugindir"
control=${plugindir}/control.zaf
[ "$ZAF_DEBUG" -gt 1 ] && zaf_plugin_info "${control}"
zaf_ctrl_check_deps "${control}"
zaf_ctrl_sudo "$plugin" "${control}" "${plugindir}"
zaf_ctrl_cron "$plugin" "${control}" "${plugindir}"
zaf_ctrl_generate_cfg "${control}" "${plugin}" \
| zaf_far '{PLUGINDIR}' "${plugindir}" >${ZAF_AGENT_CONFIGD}/zaf_${plugin}.conf
zaf_dbg "Generated ${ZAF_AGENT_CONFIGD}/zaf_${plugin}.conf"
zaf_ctrl_install "$url" "${control}" "${plugindir}"
else
zaf_err "Cannot install plugin '$plugin' to $plugindir!"
fi
else
zaf_err "Cannot prepare plugin $1"
fi
}
# List installed plugins
# $1 - plugin
zaf_list_plugins() {
local cfile
local plugin
ls -1 ${ZAF_PLUGINS_DIR} | while read p; do
zaf_is_plugin "$(basename $p)" && echo $p
done
}
zaf_is_plugin() {
[ -d "$ZAF_PLUGINS_DIR/$1" ] && [ -f "$ZAF_PLUGINS_DIR/$1/control.zaf" ] && return
false
}
zaf_discovery_plugins() {
zaf_list_plugins | zaf_discovery '{#PLUGIN}'
}
# $1 plugin
# $2 ctrl_option
zaf_plugin_option() {
local plugindir
local cfile
if [ -z "$1" ]; then
zaf_err "Missing plugin name.";
fi
if zaf_is_plugin "$1"; then
plugindir="${ZAF_PLUGINS_DIR}/$1"
cfile="$plugindir/control.zaf"
zaf_ctrl_get_global_option $cfile $2
else
zaf_err "Plugin $1 not installed."
fi
}
zaf_plugin_version() {
zaf_plugin_option "$1" Version
}
zaf_plugin_maintainer() {
zaf_plugin_option "$1" Maintainer
}
zaf_plugin_url() {
zaf_plugin_option "$1" Url
}
zaf_plugin_web() {
zaf_plugin_option "$1" Web
}
zaf_plugin_template_url() {
echo $(zaf_plugin_option "$1" Url)/template.xml
}
# $1 plugin
# $2 test to get test items, precache to get items to precache
zaf_list_plugin_items() {
local items
local i
local p
local key
local testparms
local precache
if ! zaf_is_plugin "$1"; then
zaf_err "Missing plugin name or plugin $1 unknown. ";
fi
plugindir="${ZAF_PLUGINS_DIR}/$1"
cfile="$plugindir/control.zaf"
items=$(zaf_ctrl_get_items <$cfile)
for i in $items; do
p=$(zaf_ctrl_get_item_option $cfile $i "Parameters")
testparms=$(zaf_ctrl_get_item_option $cfile $i "Testparameters")
precache=$(zaf_ctrl_get_item_option $cfile $i "Precache")
if [ -n "$p" ]; then
if [ -n "$testparms" ] && [ "$2" = "test" ]; then
for tp in $testparms; do
echo -n "$1.$i[$tp] "
done
else
if [ -n "$precache" ] && [ "$2" = "precache" ]; then
for tp in $precache; do
echo -n "$1.$i[$tp] "
done
fi
[ "$2" != "test" ] && key="$1.$i[]"
fi
else
key="$1.$i"
fi
[ "$2" != "precache" ] && echo -n "$key "
done
echo
}
zaf_list_items() {
for p in $(zaf_list_plugins); do
echo $p: $(zaf_list_plugin_items $p)
done
}
zaf_get_item() {
if which zabbix_get >/dev/null; then
zaf_dbg zabbix_get -s localhost -k "'$1'"
(zabbix_get -s localhost -k "$1" | tr '\n' ' '; echo) || zaf_wrn "Cannot reach agent on localhost. Please localhost to Server list."
return 11
else
zaf_wrn "Please install zabbix_get binary to check items over network."
return 11
fi
}
zaf_test_item() {
if $ZAF_AGENT_BIN -t "$1" | grep ZBX_NOTSUPPORTED; then
return 1
else
$ZAF_AGENT_BIN -t "$1" | tr '\n' ' '
echo
fi
}
zaf_precache_item() {
cmd=$(grep "^UserParameter=$item" $ZAF_AGENT_CONFIGD/zaf*.conf | cut -d ',' -f 2- | sed -e "s/_cache/_nocache/")
zaf_wrn "Precaching item $item[$(echo $*| tr ' ' ',')] ($cmd)"
eval $cmd
}
zaf_remove_plugin() {
! zaf_is_plugin $1 && { zaf_err "Plugin $1 not installed!"; }
zaf_wrn "Removing plugin $1 (version $(zaf_plugin_version $1))"
rm -rf ${ZAF_PLUGINS_DIR}/$1
rm -f ${ZAF_AGENT_CONFIGD}/zaf_$1.conf ${ZAF_CROND}/zaf_$1 ${ZAF_SUDOERSD}/zaf_$1
}