Nubium Sentinel is a supervisory SaaS type service for availability monitoring and resource usage reporting.
|Ping||Ping is issued to the server to verify IP level connectivity.|
|CPU||Monitor CPU load average.|
|Memory||Check real memory total capacity, real memory usage, the amount of the swap allocated, and the amount of the swap usage.|
|Disk||Monitor Total space, Used space size on the disk.|
|Network||Monitor Input / Output network traffic volume.|
Sentinel sends 3 requests every five minutes.
If Sentinel would fail to receive every echo packet from target host within 5 seconds each,
it will appear that the remote host is not reachable.(works similar to ICMP Ping command [ping -c 3 -w 5])
|Others||Sentinel collects data every five minutes.|
Sentinel keeps watch over resources and notifies you immediately by email as soon as defined thresholds are exceeded.
(The thresholds are the values you set on the Server Information Edit page. )
The information gathered by an SNMP agent on the target host.
We support Linux, UNIX, BSD OS now. We plan to support for Windows OS in the future.
If you have any requests, please contact to the inquiry page.
Configuration of target hosts is made on the Server setting screen. You can add or edit the monitoring setting from Server List.
|Add new server. (Up to five )|
|Edit the server configuration|
|Delete the server from the list. (Collected data will be deleted together)|
|name||Please set the name of the server. (Make this a descriptive name.)|
Please set IP/FQDN of the target server.
You cannot use same IP/FQDN address for different servers.
This must be a public IP.
|Monitoring settings||monitoring target. non monitoring target.|
|Alert mail settings||The threshold of the check in order to trigger an alert email.|
Disk : The disk partition of the server.
Network : The name of the network interface card.
|Test of server setting value||
Check whether configuration is done properly.
(The SNMP agent should be installed and set to the target servers in advance. )
You can find monitoring result of resources (CPU,Memory,Disk,Network)
by selecting "Resource Monitor" of the service tab.
If you register more than 2 servers, Server List will be shown. Please select icon of the server you wants to see the result.
When the server is selected, the resource usage graphs by latest 24 hours displayed.
CPU load average of every one and five minute displayed in the chart.
Real memory total capacity, real memory usage, the amount of the swap allocated,
and the amount of the swap usage are displayed in the chart.
Total space size, Used space size on the disk displayed in the chart.
- The partition of the disk to be monitored can be specified from the Server Information Edit screen.
Please execute "Test server settings" if you are not sure about the partition, the test will inform you candidate names to set.
The amount of the Input / Output traffic volume of the network displayed in the chart.
- Network interface card to be monitored can be specified from the Server Information Edit screen.
Please execute "Test server settings" if you are not sure about the network interface card,
the test will inform you candidate names to set.
The monitoring result of Ping can be confirmed on the Ping Monitor screen in the service tab.
The registration Web site monitoring service. (via HTTP Status code)
Sentinel have been monitoring the published Web site.(via HTTP or HTTPS)
In five minutes, the registered site is monitoring.
When the response from the site doesn't return within 10 seconds, the request is issued to the site again.
When the response doesn't come back within 10 seconds continuing three times, it is judged the time-out.
Alert mail is transmitted to the registered mail address, except when the status code of the response of the site to be observed is 2xx.
(alert main example)
**** HTTP/HTTPS ALERT from Sentinel **** Target URL : http://xxx.xxx.xxx/hoge Result : HTTP status code error. 
This page explains how to install net-snmp and to change network configuration setting on Amazon EC2 Fedora server.
Please run all commands by root. Configuration of 'Security Groups' requires to login to AWS Management Console.
Install package. # yum install net-snmp Rename default configuration. # mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf-org Configuration option in the 'snmpd.conf'. # vi /etc/snmp/snmpd.conf com2sec mynetwork 220.127.116.11/32 sentinel group MyRWGroup v1 mynetwork group MyRWGroup v2c mynetwork group MyRWGroup usm mynetwork view all included .1 80 access MyRWGroup "" any noauth exact all none none syslocation [your e-mail address] syscontact [your e-mail address] proc mountd proc ntalkd 4 proc sendmail 10 1 exec echotest /bin/echo hello world disk / load 12 14 14 Adding service. # chkconfig --level 345 snmpd on Start the agent. # /etc/init.d/snmpd start
Login to AWS Management Console, and select SecurityGroup from left pane(Navigation) of the management console of EC2.
input [Custom - udp - 161 - 162 - 18.104.22.168/32] and save.
input [Custom - icmp - -1 - -1 - 22.214.171.124/32] and save.
When the setting above is successfully completed, it is recommended to make AMI.
If you have any questions, please contact to the inquiry page.
This page explains how to install snmpd and to change network configuration setting on RedHat Linux.
Please adjust it properly according to your OS and Distribution.
get from http://net-snmp.sourceforge.net/
recommend 5.3 or more. (Please use the latest as much as possible. )
Now(2009 9.30) latest version is 126.96.36.199.
# wget http://sourceforge.net/projects/net-snmp/files/net-snmp/188.8.131.52/net-snmp-184.108.40.206.tar.gz/download # tar net-snmp-220.127.116.11.tar.gz # cd net-snmp-18.104.22.168 # ./configure There are five input items and change according to your environment, please. -Press return to continue-Enter Default version of SNMP to use (3):Enter System Contact Information (username@):[your email address etc.]Enter System Location (Unknown):Enter Location to write logfile (/var/log/snmpd.log):Enter Location to write persistent information (/var/net-snmp):Enter # make # make install # vi /usr/local/share/snmp/snmpd.conf com2sec mynetwork 22.214.171.124/32 sentinel group MyRWGroup v1 mynetwork group MyRWGroup v2c mynetwork group MyRWGroup usm mynetwork view all included .1 80 access MyRWGroup "" any noauth exact all none none syslocation [your e-mail address] syscontact [your e-mail address] proc mountd proc ntalkd 4 proc sendmail 10 1 exec echotest /bin/echo hello world disk / load 12 14 14 Change execution authority. # chmod 744 /etc/init.d/snmpd Check script. # /etc/init.d/snmpd start # /etc/init.d/snmpd restart # /etc/init.d/snmpd stop Registration of automatic start. # chkconfig --add snmpd Confirmation of registration situation. # chkconfig --list snmpd snmpd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
Permission setting of tcp_wrapper
# vi /etc/hosts.allow snmpd : 126.96.36.199
# vi /etc/sysconfig/iptables -A INPUT -s 188.8.131.52/32 -p udp -m udp --dport 161 -j ACCEPT -A INPUT -s 184.108.40.206/32 -p udp -m udp --dport 162 -j ACCEPT # /etc/init.d/iptables restart
Before you install, please make sure you have met the system requirements.
Admin or Root privilege of the servers (including rental server).
Linux, UNIX, BSD (Windows OS will be available by the further version improvement. )
The servers are able to use net-snmp and SNMP compatible.
The servers should have static IP addresses or FQDN name assigned to them.
you are not allowed installing snmpd, or changing firewall setting.
a target host is set up in local network and connection from the outside is refused.
Please ask an administrator for detail.
Please fill out following items.
|ID||The ID used for login. (three characters or more)|
|Password||The password used for login. (four characters or more)|
|Password (Confirm)||Please re-enter password.|
Please input the Email address.
Alert emails or other emails will be sent from firstname.lastname@example.org to this address.
|Timezone||Please set your time zone.
(Datetime will be displayed according to the time zone.)
|Contract type||Please select the contract type. (currently Basic only)|
|Language||Please set your language to use. (currently English or Japanese)|
When "Register" button is pressed, the user registration is completed.
We will send you an email to your account as soon as it has been processed.
And you will be able to login Sentinel.
- The service of Sentinel can be tried from the user's registration free of charge for 30 days.
If you use it continuously after the probation, please change from the link of the method of payments of
the user setting screen to the registration screen of the method of payment, and register the method of payment.
The Payment method page will be shown after User registration page.
(it is also possible to go to the page from the link described in the Payment Method
of the User setting screen if the payment method has not been registered yet. )
Sentinel supports only Paypal as its payment method.
Please get the Paypal account if you do not have it yet.
We would like to increase other paying ways in the future. If you have any requests, please contact to the inquiry page.