Add zabbix-agent role

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/zabbix-agent/handlers/main.yml

+---
+
+- name: restart zabbix agent
+  service: name=zabbix-agent state=restarted

roles/zabbix-agent/tasks/main.yml

+---
+
+- name: install packages
+  pacman: name=zabbix-agent
+
+- file: path=/etc/zabbix state=directory owner=root group=root mode=755
+
+- name: create host PSK
+  shell: umask 077; head -c100 /dev/urandom | sha512sum | cut -d " " -f1 > /etc/zabbix/zabbix_agentd.psk creates=/etc/zabbix/zabbix_agentd.psk
+
+- name: fix permissions of PSK file
+  file: path=/etc/zabbix/zabbix_agentd.psk owner=zabbix-agent group=zabbix-agent mode=600
+
+- name: install agent config
+  template: src=zabbix_agentd.conf dest=/etc/zabbix/zabbix_agentd.conf owner=zabbix-agent group=zabbix-agent mode=600
+  notify:
+    - restart zabbix agent
+
+- name: run zabbix agent service
+  service: name=zabbix-agent enabled=yes state=started
+

roles/zabbix-agent/templates/zabbix_agentd.conf

+LogType=system
+Server=zabbix.archlinux.org
+ServerActive=zabbix.archlinux.org
+Hostname={{ansible_hostname|lower}}
+#Include=/etc/zabbix/zabbix_agentd.conf.d/*.conf
+
+TLSConnect=psk
+TLSAccept=psk
+TLSPSKIdentity=PSK{{ansible_hostname|lower}}
+TLSPSKFile=/etc/zabbix/zabbix_agentd.psk
+
+UserParameter=mysql.ping,mysqladmin ping|grep alive|wc -l
+UserParameter=mysql.version,mysql -V
+UserParameter=mysql.status[*],echo "show global status where Variable_name='$1';" | mysql -N | awk '{print $$2}'
+
+UserParameter=systemd.unit.is-active[*],systemctl is-active --quiet '$1' && echo 1 || echo 0
+UserParameter=systemd.unit.is-failed[*],systemctl is-failed --quiet '$1' && echo 1 || echo 0
+UserParameter=systemd.unit.is-enabled[*],systemctl is-enabled --quiet '$1' && echo 1 || echo 0
+
+UserParameter=postfix.pfmailq,mailq | grep -v "Mail queue is empty" | grep -c '^[0-9A-Z]'
+UserParameter=postfix[*],/usr/local/bin/postfix-zabbix-stats.sh $1
+
+{% raw %}
+UserParameter=custom.vfs.discover_disks, awk 'BEGIN {print "{"; print "\"data\":["; ORS=""} { if($3 !~ "^(sd[a-z]+[0-9]+|dm-.*|md[0-9]+|loop[0-9]+|sr[0-9]+)$" ) { { if (NR!=1) {print ",\n"}; print " { \"{#DEVICENAME}\":\"" $3 "\" }"} } } END {print "\n ]\n}\n"}' /proc/diskstats
+{% endraw %}
+# reads completed successfully
+UserParameter=custom.vfs.dev.read.ops[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$4; }' /proc/diskstats
+# sectors read
+UserParameter=custom.vfs.dev.read.sectors[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$6; }' /proc/diskstats
+# time spent reading (ms)
+UserParameter=custom.vfs.dev.read.ms[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$7; }' /proc/diskstats
+# writes completed
+UserParameter=custom.vfs.dev.write.ops[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$8; }' /proc/diskstats
+# sectors written
+UserParameter=custom.vfs.dev.write.sectors[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$10; }' /proc/diskstats
+# time spent writing (ms)
+UserParameter=custom.vfs.dev.write.ms[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$11; }' /proc/diskstats
+# I/Os currently in progress
+UserParameter=custom.vfs.dev.io.active[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$12; }' /proc/diskstats
+# time spent doing I/Os (ms)
+UserParameter=custom.vfs.dev.io.ms[*],awk -v disk="$1" '{ if ($$3 == disk)  print $$13; }' /proc/diskstats