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11c6d82791
systemctl calculates memory consumption quite differently than existing plugins, which usually query /proc/. This plugin monitors what memory a service uses according to systemctl.
117 lines
3.3 KiB
Bash
Executable file
117 lines
3.3 KiB
Bash
Executable file
#!/bin/sh
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: << =cut
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=head1 NAME
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systemd_mem - Plugin to graph the memory usage of multiple systemd services as reported by systemctl
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=head1 CONFIGURATION
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The environment variable "services" is used to provide a space separated list of services to graph.
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Example:
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[systemd_mem]
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env.services apache2 tomcat9 mysql
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env.services defaults to "munin-node".
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=head1 VERSION
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1.0
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=head1 AUTHOR
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Paul Alexandrow <paul@alexandrow.org>
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=head1 LICENSE
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Copyright 2021 Paul Alexandrow, paul@alexandrow.org
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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and associated documentation files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or
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substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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=head1 MAGIC MARKERS
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#%# family=auto
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#%# capabilities=autoconf
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=cut
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. "$MUNIN_LIBDIR/plugins/plugin.sh"
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output_config() {
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echo "graph_title Systemd Service Memory Usage"
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echo "graph_info Memory usage for selected services as reported by systemctl"
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echo "graph_vlabel bytes"
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echo "graph_args --base 1024 --lower-limit 0"
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echo "graph_category memory"
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for service in ${services:-"munin-node"}; do
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clean_name="$(clean_fieldname "$service")"
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description=$(systemctl show "$service" --all | grep ^Description= | cut -d '=' -f 2)
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printf "%s.label %s\n" "$clean_name" "$description"
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printf "%s.info memory usage\n" "$clean_name"
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done
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}
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output_values() {
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for service in ${services:-"munin-node"}; do
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clean_name="$(clean_fieldname "$service")"
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usage=$(systemctl show "$service" --all | grep ^MemoryCurrent= | cut -d '=' -f 2)
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if [ "$usage" = "[not set]" ]; then
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usage=0
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fi
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printf "%s.value %d\n" "$clean_name" "$usage"
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done
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}
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output_usage() {
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printf >&2 "%s - munin plugin to graph memory usage for systemd services\n" "${0##*/}"
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printf >&2 "Usage: %s [config]\n" "${0##*/}"
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}
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output_autoconf() {
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if command -v systemctl >/dev/null 2>&1; then
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echo "yes"
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else
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echo "no (systemctl not found)";
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fi
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}
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case $# in
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0)
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output_values
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;;
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1)
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case $1 in
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autoconf)
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output_autoconf
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;;
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config)
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output_config
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;;
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fetch)
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output_values
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;;
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*)
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output_usage
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exit 1
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;;
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esac
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;;
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*)
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output_usage
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exit 1
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;;
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esac
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