Connectionproblems between zabbix Server and Agent

[dxUser]

Hello I'm using zabbix 1.8.4,

I'm trying to monitor one agent and it doesen't work.


Here the config file from zabbix server:

############ GENERAL PARAMETERS #################

# This defines unique NodeID in distributed setup,
# Default value 0 (standalone server)
# This parameter must be between 0 and 999
#NodeID=0

# Number of pre-forked instances of pollers
# Default value is 5
# This parameter must be between 0 and 255
#StartPollers=5

# Number of pre-forked instances of IPMI pollers
# Default value is 0
# This parameter must be between 0 and 255
#StartIPMIPollers=0

# Number of pre-forked instances of pollers for unreachable hosts
# Default value is 1
# This parameter must be between 0 and 255
#StartPollersUnreachable=1

# Number of pre-forked instances of trappers
# Default value is 5
# This parameter must be between 0 and 255
#StartTrappers=5

# Number of pre-forked instances of ICMP pingers
# Default value is 1
# This parameter must be between 0 and 255
#StartPingers=1

# Number of pre-forked instances of discoverers
# Default value is 1
# This parameter must be between 0 and 255
#StartDiscoverers=1

# Number of pre-forked instances of HTTP pollers
# Default value is 1
# This parameter must be between 0 and 255
#StartHTTPPollers=1

# Listen port for trapper. Default port number is 10051. This parameter
# must be between 1024 and 32767

ListenPort=10051

# Source IP address for outgoing connections
#SourceIP=

# Listen interface for trapper. Trapper will listen on all network interfaces
# if this parameter is missing.

#ListenIP=127.0.0.1

# How often ZABBIX will perform housekeeping procedure
# (in hours)
# Default value is 1 hour
# Housekeeping is removing unnecessary information from
# tables history, alert, and alarms
# This parameter must be between 1 and 24

#HousekeepingFrequency=1

# How often ZABBIX will try to send unsent alerts
# (in seconds)
# Default value is 30 seconds
SenderFrequency=30

# Uncomment this line to disable housekeeping procedure
#DisableHousekeeping=1

# Specifies debug level
# 0 - debug is not created
# 1 - critical information
# 2 - error information
# 3 - warnings (default)
# 4 - for debugging (produces lots of information)

DebugLevel=3

# Specifies how long we wait for agent response (in sec)
# Must be between 1 and 30
Timeout=5

# Specifies how many seconds trapper may spend processing new data
# Must be between 1 and 300
#TrapperTimeout=5

# After how many seconds of unreachability treat a host as unavailable
#UnreachablePeriod=45

# How often check host for availability during the unavailability period
#UnavailableDelay=60

# Name of PID file

PidFile=/var/run/zabbix-server/zabbix_server.pid

# Name of log file
# If not set, syslog is used

LogFile=/var/log/zabbix-server/zabbix_server.log

# Maximum size of log file in MB. Set to 0 to disable automatic log rotation.
#LogFileSize=1

# Location for custom alert scripts
AlertScriptsPath=/etc/zabbix/alert.d/

# Location of external scripts
#ExternalScripts=/etc/zabbix/externalscripts

# Location of fping. Default is /usr/sbin/fping
# Make sure that fping binary has root permissions and SUID flag set
#FpingLocation=/usr/sbin/fping

# Location of fping6. Default is /usr/sbin/fping6
# Make sure that fping binary has root permissions and SUID flag set
#Fping6Location=/usr/sbin/fping6

# Temporary directory. Default is /tmp
#TmpDir=/tmp

# Frequency of ICMP pings (item keys 'icmpping' and 'icmppingsec'). Default is 60 seconds.
#PingerFrequency=60

# Database host name
# Default is localhost

DBHost=localhost

# Database name
# SQLite3 note: path to database file must be provided. DBUser and DBPassword are ignored.
DBName=zabbix

# Database user

DBUser=zabbix

# Database password
# Comment this line if no password used

DBPassword=xxxxx

# Connect to MySQL using Unix socket?

#DBSocket=/tmp/mysql.sock

Here the config file from zabbix agent:

############ GENERAL PARAMETERS #################

# List of comma delimited IP addresses (or hostnames) of ZABBIX servers.
# No spaces allowed. First entry is used for sending active checks.
# Note that hostnames must resolve hostname->IP address and
# IP address->hostname.

Server=Server-IP

# Server port for sending active checks

ServerPort=10051

# Unique hostname. Required for active checks.

Hostname=hostname

# Listen port. Default is 10050

ListenPort=10050

# IP address to bind agent
# If missing, bind to all available IPs

#ListenIP=127.0.0.1

# Number of pre-forked instances of zabbix_agentd.
# Default value is 5
# This parameter must be between 1 and 16

StartAgents=5

# How often refresh list of active checks. 2 minutes by default.

#RefreshActiveChecks=120

# Disable active checks. The agent will work in passive mode listening server.

#DisableActive=1

# Enable remote commands for ZABBIX agent. By default remote commands disabled.

#EnableRemoteCommands=1

# Specifies debug level
# 0 - debug is not created
# 1 - critical information
# 2 - error information
# 3 - warnings
# 4 - information (default)
# 5 - for debugging (produces lots of information)

DebugLevel=3

# Name of PID file

PidFile=/var/run/zabbix-agent/zabbix_agentd.pid

# Name of log file.
# If not set, syslog will be used

LogFile=/var/log/zabbix-agent/zabbix_agentd.log

# Maximum size of log file in MB. Set to 0 to disable automatic log rotation.
#LogFileSize=1

# Spend no more than Timeout seconds on processing
# Must be between 1 and 30

Timeout=3

####### USER-DEFINED MONITORED PARAMETERS #######
# Format: UserParameter=<key>,<shell command>
# Note that shell command must not return empty string or EOL only
#UserParameter=system.test,who|wc -l
### Set of parameter for monitoring MySQL server (v3.23.42 and later)
### Change -u<username> and add -p<password> if required
#UserParameter=mysql.ping,mysqladmin -uroot ping|grep alive|wc -l
#UserParameter=mysql.uptime,mysqladmin -uroot status|cut -f2 -d":"|cut -f1 -d"T"
#UserParameter=mysql.threads,mysqladmin -uroot status|cut -f3 -d":"|cut -f1 -d"Q"
#UserParameter=mysql.questions,mysqladmin -uroot status|cut -f4 -d":"|cut -f1 -d"S"
#UserParameter=mysql.slowqueries,mysqladmin -uroot status|cut -f5 -d":"|cut -f1 -d"O"
#UserParameter=mysql.qps,mysqladmin -uroot status|cut -f9 -d":"
#UserParameter=mysql.version,mysql -V

Here are the log-file from agent:

10147:20110311:173319 zabbix_agentd started. ZABBIX 1.6.
10148:20110311:173319 zabbix_agentd collector started
10149:20110311:173319 zabbix_agentd listener started
10150:20110311:173319 zabbix_agentd listener started
10151:20110311:173319 zabbix_agentd listener started
10152:20110311:173319 zabbix_agentd active check started [Server-IP:10051]
10152:20110311:173319 Unsucesfull response received from server

Here are the log-file from server:

Item [Agent-Hostname:system.cpu.load[,avg1]] error: Get value from agent failed: *** Cannot connect to [Agent-Hostname]:10050 [Interrupted system call] 9305:20110311:173811.202 ZABBIX Host [Agent-Hostname]or, wait for 15 seconds

Firewall is disabled

I would be very grateful if somebody could tell me how I can fix this problem.


Greeting
dxUser

[dxUser]

Problem still exists

Hello Zabbix-Users,

unfortunately my problem is still present.

Is there somebody who could spend some minutes
to help me with this problem?

[zalex_ua]

############ GENERAL PARAMETERS #################
# Unique hostname. Required for active checks.
Hostname=hostname


Here are the log-file from agent:
10152:20110311:173319 zabbix_agentd active check started [Server-IP:10051]
10152:20110311:173319 Unsucesfull response received from server

The host with the name "hostname" really exist in the Zabbix server configuration? And it's in active state ?

[vinh.ho]

make sure that the Hostname in /etc/zabbix/zabbix_agentd.conf is CORRECT
In your zabbix_server.conf file i found that server is localhost
and in your zabbix_agentd.conf is Hostname=hostname ?!

[dxUser]

The host with the name "hostname" really exist in the Zabbix server configuration? And it's in active state ?

I'm a little bit baffled.

In the agentd.conf the hostname is set but what do you mean with "really exist in the Zabbix server configuration"?? In the Zabbix Server GUI there is a server with the accordingly name as in the agentd.conf-File of the server which should be monitored.

Active state? The zabbix server should automatically check the agents.

[vinh.ho]

for example :
1/ In zabbix_agentd.conf you set Hostname is : hostname=abc
2/ So in the web GUI when you creat a host, the name of host must be "abc"

[dxUser]

The hostname in the agentd.conf is the same as the name in the Zabbix Server GUI.

Is it importent to reach the host by IP-Address or DNS-Name?
If I create a new host, I can configure the DNS Name and the IP-Address, than I can decide to "Connect to" via IP-Address or DNS-Name. In my configuration for the host, I have choosen IP-Address. Agent Port is 10050, no proxy.

[dxUser]

Not giving up

Hello,

my problem is still existing but I'm not giving up ;-)

Test's I have made:

If I install and configure new servers internal, there is no problem with connections and I can monitor the servers without trouble. So I think that my problem between the zabbix server and the monitored server(agent) is caused by the agent.

If I trie to connect via telnet from the server(agent) which should be monitored to the zabbix-server, this connection works:

server-name:/var/# telnet server-ip(firewall with portforwarding) 10051
Trying server-ip...
Connected to server-ip.
Escape character is '^]'.

Connection closed by foreign host.


If I trie to connect from the zabbix-server to the server(agent) this error is shown:

root@server:~# telnet server-ip(agent) 10050
Trying server-ip...
telnet: Unable to connect to remote host: Connection timed out

So I think theres somewhere the problem.

Somebody any ideas?


Greetings
dxUser



Edit: On the server(agent) I added the port to iptables with

iptables -A INPUT -p tcp --dport 10050 -j ACCEPT
iptables -A INPUT -p udp --dport 10050 -j ACCEPT

but there is no change

[dxUser]

Hello Zabbix-Users,

at the moment I'm a little bit frustrated. Is there nobody who has the same or similar problems.

Greetings
dxUser

[Bennie]

might be late but i hope you still watch the topic.

try to telnet to this: telnet aria.dominating.nl 10050

Let me know if it works.

[sue]

Hello Zabbix-Users,

at the moment I'm a little bit frustrated. Is there nobody who has the same or similar problems.

Greetings
dxUser

i have the same problem. Still cannot solve yet.
what function of this below line?

telnet aria.dominating.nl 10050

[Bennie]

at the time i was suspecting the OP to have firewall issues to external connections over port 10050. I opened a port on one of my servers to check that but he never came around to test it.

[sue]

my problem only happen when i want to connect with dmz server. With other server is ok. Why this happen? firewall already stop. telnet also can connect

[untergeek]

Does it connect in the other direction?

On Zabbix Client Machine:
telnet zabbix.server.org 10051

On Zabbix Server Machine:
telnet zabbix.client.org 10050

If connectivity is established both directions, then it could be a matter of name configuration and whether it's added to Zabbix in the UI with a name that matches that in the zabbix_agentd.conf

[sue]

i get this error

Get value from agent failed: ZBX_TCP_READ() failed [Interrupted system call]

I check evrything is OK. But still got error