What Is Nagios?
Open-source software, Nagios enables continuous monitoring of networks, systems, and infrastructure. A server runs plugins that are located on another server or host in your network, or on the Internet. Nagios alerts the technical team if any failures occur so that they can perform repair processes as soon as possible. A DevOps culture uses Nagios to monitor systems, applications, services, and business processes. It lets you see each element of your IT system at any given moment. There are a number of features that make Nagios useful to a large community of users −
● It is able to monitor databases such as SQL Server, MySQL, Oracle, and PostgreSQL
● It provides application-specific information (such as Apache, LDAP, Postfix, Citrix, etc.).
● There is active development.
● The community is very active.
● Nagios can be installed on any platform.
● It works by pinging every host to check it's reachable.
Nagios Demo
What AssistNix Serve?
1. Nagios Application Consultation For Open Source Software
Open source adoption, management, governance, and compliance are components of our end-to-end solutions and services. We provide Putting your business vision into practice with an open source roadmap while converting your costs into savings with a team of consultants from different verticals and domains.
2. Nagios On Premises Installation And Configuration.
Using the AssistNix Configuration Guide, you will find all the information necessary to set up PHP Server Monitor and enable it to communicate with other resources on your network. Furthermore, the Configuration Guide contains instructions on moving users and devices to a control PHP Server Monitor.
3. Issues Fixes On Self Hosted Servers.
There are many advantages to hosting your Cloud Applications with us; for example, reduced expenses, instant deployment, and reduced administration expenses.
Low Maintenance
Allow us to handle all your hardware and software issues so you can focus on your applications. Only worry about maintaining the internet connection.
Anywhere - Anytime
You can have access to your cloud application from anywhere in the world when it is running on an Internet server.
Dedicated Server
An integrated online server hosts your application and provides access to all the systems you need.
Less Risk
You have no risk at all since there are no long-term service contracts. Terralogic only charges you for what you use.
4. Nagios User Guide & Application Use.
Your data is fully under your control when you self-host your software. Your organization's firewall can protect your data. We keep all your critical information in-house and we do not share it with anyone else. Your data can be accessed without an internet connection, which is especially important. In deciding the terms and conditions, you need to know exactly where your data is stored and what regulations need to be met.
5. Nagios Application SaaS Hosting.
To ensure that our users have a positive experience with AssistNix, we also offer excellent application user guides. The user guide utilizes simple language, images, logical hierarchies and flows, a table of contents, searchable content, easily accessible content, a decent design, as well as references to other resources.
Key Features Of Nagios
Nagios has all the features you need to accelerate your business growth and provide exceptional customer experiences.
List Of Key Features
● Performance Metrics
● Applications Management
● Real Time Comparisons
● Real Time Monitoring
● Scheduling
● Maintenance Scheduling
● Alerts Notifications
● Server Performance
● Application Monitoring
● Uptime Monitoring
● Event-Based Notifications
● Uptime Reporting
● Mail Server Monitoring
● Voice / SMS Alerts
● CPU Monitoring
Nagios Installation
Nagios requires certain packages to be installed on your Ubuntu system, like PHP, Apache, the building packages, etc. Hence, let us install them first. Execute the required command to install the packages you need. In the next step, create a user in Nagios and add it to the Apache www-data user. After that, download the latest version of Nagios, you can download from here.
Follow the on-screen instructions to install the init and external commands. After that, navigate to the Nagios directory and copy the event handler directory over. install the plugions and create a server directory. Set up the nagiosadmin user and enable the Apache modules. Start Nagios after creating the executable file for Nagios. Open your browser and navigate to http://localhost/nagios. Enter the password that you set earlier when you logged into Nagios with the username nagiosadmin.
How To Install Nagios In CentOS
Installing Nagios 4.4.6 and Nagios Plugin 2.3.3
RHEL | CentOS | Oracle Linux
Security-Enhanced Linux
This guide is based on SELinux being disabled or in permissive mode. Steps to do this are as follows.
# sed -i 's/SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config # setenforce 0
Prerequisites
RHEL 5/6/7 | CentOS 5/6/7 | Oracle Linux 5/6/7
# yum install -y gcc glibc glibc-common wget unzip httpd php gd gd-devel perl postfix
RHEL 8 | CentOS 8 | CentOS Stream 8
# dnf install -y gcc glibc glibc-common perl httpd php wget gd gd-devel # dnf update -y
Downloading the Source
# cd /tmp # wget -O nagioscore.tar.gz https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.6.tar.gz # tar xzf nagioscore.tar.gz
Compile
# cd /tmp/nagioscore-nagios-4.4.6/ # ./configure # make all
Create User And Group
# make install-groups-users # usermod -a -G nagios apache
Install Binaries
# make install
Install Service / Daemon
RHEL 5/6 | CentOS 5/6 | Oracle Linux 5/6
# make install-daemoninit # chkconfig --level 2345 httpd on
RHEL 7/8 | CentOS 7/8 | Oracle Linux 7/8 | CentoOS Stream 8
# make install-daemoninit # systemctl enable httpd.service
Install Command Mode
# make install-commandmode
Install Configuration Files
# make install-config
Install Apache Config Files
# make install-webconf
Configure Firewall
You need to allow port 80 inbound traffic on the local firewall so you can reach the Nagios Core web interface.
RHEL 5/6 | CentOS 5/6 | Oracle Linux 5/6
# iptables -I INPUT -p tcp --destination-port 80 -j ACCEPT # service iptables save # ip6tables -I INPUT -p tcp --destination-port 80 -j ACCEPT # service ip6tables save
RHEL 7/8 | CentOS 7/8 | Oracle Linux 7/8 | CentOS Stream 8
# firewall-cmd --zone=public --add-port=80/tcp # firewall-cmd --zone=public --add-port=80/tcp --permanent
Create nagiosadmin User Account
The following command will create a user account called nagiosadmin and you will be prompted to provide a password for the account.
# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Start Apache Web Server
RHEL 5/6 | CentOS 5/6 | Oracle Linux 5/6
# service httpd start
RHEL 7/8 | CentOS 7/8 | Oracle Linux 7/8 | CentOS Stream 8
# systemctl start httpd.service
Start Service / Daemon
RHEL 5/6 | CentOS 5/6 | Oracle Linux 5/6
# service nagios start
RHEL 7/8 | CentOS 7/8 | Oracle Linux 7/8 | CentOS Stream 8
# systemctl start nagios.service
Installing The Nagios Plugins
Prerequisites
CentOS 5
# yum install -y gcc glibc glibc-common make gettext automake wget openssl-devel net-snmp net-snmp-utils epel-release # yum install -y perl-Net-SNMP # cd /tmp # wget http://ftp.gnu.org/gnu/autoconf/autoconf-2.60.tar.gz # tar xzf autoconf-2.60.tar.gz # cd /tmp/autoconf-2.60 # ./configure # make # make install
CentOS 6/7
# yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils epel-release # yum install -y perl-Net-SNMP
CentOS 8 | CentOS Stream 8
# yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils epel-release # yum --enablerepo=powertools,epel install perl-Net-SNMP
RHEL 5 | Oracle Linux 5
# cd /tmp # wget http://archives.fedoraproject.org/pub/archive/epel/epel-release-latest-5.noarch.rpm # rpm -ihv epel-release-latest-5.noarch.rpm # yum install -y gcc glibc glibc-common make gettext automake wget openssl-devel net-snmp net-snmp-utils # yum install -y perl-Net-SNMP # wget http://ftp.gnu.org/gnu/autoconf/autoconf-2.60.tar.gz # tar xzf autoconf-2.60.tar.gz # cd /tmp/autoconf-2.60 # ./configure # make # make install
RHEL 6 | Oracle Linux 6
# cd /tmp # wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm # rpm -ihv epel-release-latest-6.noarch.rpm # yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils # yum install -y perl-Net-SNMP
RHEL 6 | Oracle Linux 6
# cd /tmp # wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm # rpm -ihv epel-release-latest-7.noarch.rpm # subscription-manager repos --enable=rhel-7-server-optional-rpms # yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils # yum install -y perl-Net-SNMP
Oracle Linux 7
# yum install -y yum-utils # yum-config-manager --enable ol7_optional_latest # cd /tmp # wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm # rpm -ihv epel-release-latest-7.noarch.rpm # yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils # yum install -y perl-Net-SNMP
Oracle Linux 8
# yum install -y yum-utils # yum-config-manager --enable ol8_optional_latest # cd /tmp # wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm # rpm -ihv epel-release-latest-8.noarch.rpm # yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils # yum install -y perl-Net-SNMP
Downloading The Source
# cd /tmp # wget --no-check-certificate -O nagios-plugins.tar.gz https://github.com/nagios-plugins/nagios-plugins/archive/release-2.3.3.tar.gz # tar zxf nagios-plugins.tar.gz
Compile + Install
# cd /tmp/nagios-plugins-release-2.3.3/ # ./tools/setup # ./configure # make # make install
Test Plugins
Point your web browser to the ip address or FQDN of your Nagios Core server, for example:
http://10.25.5.143/nagios
http://core-013.domain.local/nagios
https://www.nagios.assistnix.com/nagios/
After login you will this page
Service / Daemon Commands
RHEL 5/6 | CentOS 5/6 | Oracle Linux 5/6
# service nagios start # service nagios stop # service nagios restart # service nagios status
RHEL 7/8 | CentOS 7/8 | Oracle Linux 7/8 | CentOS Stream 8
# systemctl start nagios.service # systemctl stop nagios.service # systemctl restart nagios.service # systemctl status nagios.service
How To Install Nagios In Ubuntu
Security-Enhanced Linux
# sudo dpkg -l selinux*
Prerequisites
Ubuntu 14.x / 15.x
# sudo apt-get update # sudo apt-get install -y autoconf gcc libc6 make wget unzip apache2 apache2-utils php5 libgd2-xpm-dev
Ubuntu 16.x / 17.x
# sudo apt-get update # sudo apt-get install -y autoconf gcc libc6 make wget unzip apache2 apache2-utils php5 libgd2-xpm-dev
Ubuntu 18.x
# sudo apt-get update # sudo apt-get install -y autoconf gcc libc6 make wget unzip apache2 php libapache2-mod-php7.2 libgd-dev
Ubuntu 20.x
# sudo apt-get update # sudo apt-get install -y autoconf gcc libc6 make wget unzip apache2 php libapache2-mod-php7.4 libgd-dev
Downloading the Source
# cd /tmp # wget -O nagioscore.tar.gz https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.6.tar.gz # tar xzf nagioscore.tar.gz
Compile
# cd /tmp/nagioscore-nagios-4.4.6/ # sudo ./configure --with-httpd-conf=/etc/apache2/sites-enabled # sudo make all
Create User And Group
# sudo make install-groups-users # sudo usermod -a -G nagios www-data
Install Binaries
# sudo make install
Install Service / Daemon
# sudo make install-daemoninit
Install Command Mode
# sudo make install-commandmode
Install Configuration Files
# sudo make install-config
Install Apache Config Files
# sudo make install-webconf # sudo a2enmod rewrite # sudo a2enmod cgi
Configure Firewall
# sudo ufw allow Apache # sudo ufw reload
Create nagiosadmin User Account
# sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Start Apache Web Server
Ubuntu 14.x
Need to restart it because it is already running.
# sudo service apache2 restart
Ubuntu 15.x / 16.x / 17.x / 18.x / 20.x
Need to restart it because it is already running.
# sudo systemctl restart apache2.service
Start Service / Daemon
This command starts Nagios Core.
Ubuntu 14.x
# sudo start nagios
Ubuntu 15.x / 16.x / 17.x / 18.x / 20.x
# sudo systemctl start nagios.service
Installing The Nagios Plugins
Prerequisites
# sudo apt-get install -y autoconf gcc libc6 libmcrypt-dev make libssl-dev wget bc gawk dc build-essential snmp libnet-snmp-perl gettext
Downloading The Source
# cd /tmp # wget --no-check-certificate -O nagios-plugins.tar.gz https://github.com/nagios-plugins/nagios-plugins/archive/release-2.3.3.tar.gz # tar zxf nagios-plugins.tar.gz
Compile + Install
# cd /tmp/nagios-plugins-release-2.3.3/ # sudo ./tools/setup # sudo ./configure # sudo make # sudo make install
Test Plugins
Point your web browser to the ip address or FQDN of your Nagios Core server, for example:
http://10.25.5.143/nagios
http://core-013.domain.local/nagios
https://nagios.assistnix.com/nagios/
After loin you will see this page
Service / Daemon Commands
Ubuntu 14.x
# sudo start nagios # sudo stop nagios # sudo restart nagios # sudo status nagios
Ubuntu 15.x / 16.x / 17.x / 18.x / 20.x
# sudo systemctl start nagios.service # sudo systemctl stop nagios.service # sudo systemctl restart nagios.service # sudo systemctl status nagios.service
Step By Step Guide Of How To Use Nagios By AssistNix
This guide is an overview of the basic features to get you started. Nagios is an open source project that is being updated continuously.
Actively monitoring the network is done by Nagios XI Server in one of two ways:
Agent
A Linux server serves as an agent on the network. As part of the monitoring process, Nagios communicates with the agent to check a variety of stats (such as drive space, memory, CPU usage, etc.). Once Nagios XI receives the information, it stores it for later use, generating charts, reports, and graphs. It can also generate warnings and alerts. By using the alert, you will know how much space is available on the drive or if something else is wrong by the generated alert. (That is a very general overview of a software package with enormous customization potential.)
Native Protocol
Monitoring devices through native protocols is another option. Nagios natively supports two protocols, SNMP, which is a protocol specific to networks, and WMI, which is a protocol specific to Microsoft environments. With Nagios XI, you can see how your network switches are performing if they are configured with SNMP. Once the switch responds, it may indicate that something is wrong (e.g., a port is down, or nothing is happening).
FAQs For Nagios Application
1. What kind of services does Assistnix provide?
At AssistNix, we offer a complete consulting service for open source applications, like PHP Server Monitor, in addition to installing and configuring PHP Server Monitor on-site. If you have issues with your self-hosted server, we offer services to fix the problems, so that you will not face any issues. Apart from all this, we also offer highly professional and trustworthy Magento hosting services. These services can be enjoyed at very low rates as well. The quality of our services is never compromised in our effort to offer affordable rates.
2. Are there Assistnix demos or trial versions available?
There is a demo or trial version of nagios available for download. Our trial and demo services have been made available to the general public so that those who are unsure whether they would like to utilize our service can try it out for free.
With AssistNix, you can view a demo of your favourite open source application in real time, with demos of all major open source applications, we provide hosting space and support for community-driven apps. AssistNix provides applications, security, and compliance consultation, maintenance, and support well suited to the specific needs of your organization.
Using our expertise, you can spend your time on business expansion instead of managing applications. You don't need to spend precious time managing infrastructure or specifications because we provide product and technology services.
3. How can I receive Assistnix support?
Contacting AssistNix is a simple and straightforward process. We offer several ways for our clients to reach out to us. According to your membership level, you may contact us by email, phone, via our support portal, or via our support forums. You can always count on our team to provide you with the assistance you need. We will take care of any problem you're experiencing. Our team will respond as soon as possible no matter how you contact us.
4. How do I monitor Windows servers?
Monitoring internal metrics is easy with WMI and NSClient++. Decide first which method is best for your needs. Microsoft's built-in management interface works with WMI, but NSClient++ is a new agent, capable of connecting to a wide range of devices. You can script out performance counters, Powershell, WMI and anything else you want to script out. You can achieve this if your application returns both an exit code and a result.
5. What type of notifications does Nagios support?
Script your own email, SMS, or whatever you want.
6. Does Nagios XI have an audit log?
There's a page for this in the Enterprise edition's Admin -> Audit Log section.
7. Can I integrate it with my ticketing system?
You should be able to do this as long as there is a method for communicating with your ticketing system, such as an API. Is your current system compatible with ours? Please contact sales if you have any questions.
8. Does Nagios XI have an API?
It is possible to automate a lot of things with it as well! In the 'Help' menu, you can find examples of how different use cases can be handled.
9. How do I monitor Linux servers?
There are a number of ways to achieve this, but two main routes are most popular. On each client machine, you must install an agent called NRPE. Afterwards, setup checks will need to be configured for monitoring using the Linux wizard. Check_by_ssh, on the other hand, uses SSH keys for authentication and execution. If you want to execute a certain metric that requires the client machine to be installed, these scripts will still need to be run with the nagios-plugins.
10. Does Nagios have provisions regarding disposition of data upon request and when a contract ends?
Definitely. All global data privacy policies and regulations, including GDPR, are adhered to by Nagios Enterprises. We don't host customer data here, so our information about customers is significantly less than that of other monitoring platforms, and any data is easily removed at a client's request and/or upon contract termination.
11. Is the infrastructure actively monitored and maintained by system administrators?
Certainly. There are dedicated in-house staff members monitoring and maintaining the infrastructure 24 hours a day.
12. What is your backup methodology for databases and web application servers? What about a disaster recovery plan?
Data backup and system backup are both available with Nagios solutions. The licensing options we offer enable users to implement a high availability or disaster recovery solution in a matter of minutes.
13. What is the turnaround time for system retrievability and activation if a disaster event occurs?
The SLA will depend largely on your internal operations due to Nagios' inherent flexibility and customization. Depending on your preferences, Nagios solutions can be immediately activated. You can customize many of these factors to meet the specific needs of your organization based on the Nagios solutions that exist in your own environment.
14. Do you have the capability to logically segment and recover data for a specific customer in the case of a failure or data loss?
Unfortunately, we don't. We cannot access your information.
15. Do you notify customers on security incidents that impact them?
Whenever there is an incident that may affect a customer, we notify them immediately. Our company does not retain customer data, so there is no possibility of sensitive information being compromised. On our Security Disclosures page, you can see which security vulnerabilities have been addressed in our product.
