After doing a clean install of zabbix-proxy on a CentOS 6 server, all our icmpping / icmppingsec items started to return zero values.

Zabbix debug log showed following lines:

31790:20140611:073610.004 In process_ping() hosts_count:1
31790:20140611:073610.004 /tmp/zabbix_proxy_31790.pinger
31790:20140611:073610.004 10.211.7.245
31790:20140611:073610.004 /usr/sbin/fping -C5 -p200 -b1024 -t1000 2>&1 The problem was in SELinux policy, however audit.log did not show any blocked events until the following command was run:

yum install -y policycoreutils-python
/usr/sbin/semodule -DB

The -D option disables dontaudit rules; the -B option rebuilds policy.

type=SYSCALL msg=audit(1402473587.551:550371): arch=c000003e syscall=5 success=no exit=-13 a0=0 a1=7fff2c862c70 a2=7fff2c862c70 a3=238 items=0 ppid=16064 pid=16065 auid=0 uid=500 gid=500 euid=500 suid=0 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=87526 comm="fping" exe="/usr/sbin/fping" subj=unconfined_u:system_r:ping_t:s0 key=(null)
type=AVC msg=audit(1402473588.556:550372): avc:  denied  { getattr } for  pid=16067 comm="fping" path="/tmp/zabbix_proxy_31776.pinger" dev=dm-0 ino=784936 scontext=unconfined_u:system_r:ping_t:s0 tcontext=unconfined_u:object_r:initrc_tmp_t:s0 tclass=file

To add an exception for this event run following command:

grep fping /var/log/audit/audit.log | audit2allow -M zabbix_fping
semodule -i zabbix_fping.pp

Now icmpping / icmppingsec checks should succeed:

29940:20140611:071726.366 In process_ping() hosts_count:1
 29940:20140611:071726.366 /tmp/zabbix_proxy_29940.pinger
 29940:20140611:071726.366     10.20.2.20
 29940:20140611:071726.366 /usr/sbin/fping -C5 -p200 -b24 -t900 2>&1 

					

To compile PHP for Zabbix 2.2 frontend you will need to use the following keys:

./configure --enable-mbstring --enable-sockets --with-mysql  --with-mysqli --with-ldap --enable-fpm --enable-bcmath  --with-gettext --with-xmlrpc --with-openssl --with-mcrypt --with-gd --with-zlib --with-freetype-dir=/usr/include/freetype2 --with-jpeg-dir=/usr/lib 

PHP ini required values (minimal):

 memory_limit = 128M
 post_max_size = 16M
 upload_max_filesize = 2M
 max_execution_time = 300
 max_input_time = 300
 session.auto_start = 0

Here is simple backup script for Zabbix 2 configuration data (hosts, items, templates etc). It will not backup history/event/trend data, so backup file is relatively small.

Just replace ZBX_DB and ZBX_USER with Zabbix database name and username.

mysqldump -u ZBX_USER -p ZBX_DB \
	--ignore-table=ZBX_DB.acknowledges \
	--ignore-table=ZBX_DB.alerts \
	--ignore-table=ZBX_DB.auditlog \
	--ignore-table=ZBX_DB.auditlog_details \
	--ignore-table=ZBX_DB.escalations \
	--ignore-table=ZBX_DB.events \
	--ignore-table=ZBX_DB.history \
	--ignore-table=ZBX_DB.history_log \
	--ignore-table=ZBX_DB.history_str \
	--ignore-table=ZBX_DB.history_str_sync \
	--ignore-table=ZBX_DB.history_sync \
	--ignore-table=ZBX_DB.history_text \
	--ignore-table=ZBX_DB.history_uint \
	--ignore-table=ZBX_DB.history_uint_sync \
	--ignore-table=ZBX_DB.trends \
	--ignore-table=ZBX_DB.trends_uint \
	| gzip > zbx_db.sql.gz