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How to Setup iTOP (IT Operational Portal) on CentOS 7
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================================================================================
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iTOP is a simple, Open source web based IT Service Management tool. It has all of ITIL functionality that includes with Service desk, Configuration Management, Incident Management, Problem Management, Change Management and Service Management. iTop relays on Apache/IIS, MySQL and PHP, so it can run on any operating system supporting these applications. Since iTop is a web based application you don’t need to deploy any client software on each user’s PC. A simple web browser is enough to perform day to day operations of an IT environment with iTOP.
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To install and configure iTOP we will be using CentOS 7 as base operating with basic LAMP Stack environment installed on it that will cover its almost all prerequisites.
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### Downloading iTOP ###
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iTop download package is present on SourceForge, we can get its link from their official website [link][1].
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We will the download link from here and get this zipped file on server with wget command as below.
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[root@centos-007 ~]# wget http://downloads.sourceforge.net/project/itop/itop/2.1.0/iTop-2.1.0-2127.zip
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### iTop Extensions and Web Setup ###
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By using unzip command we will extract the downloaded packages in the document root directory of our apache web server in a new directory with name itop.
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[root@centos-7 ~]# ls
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iTop-2.1.0-2127.zip
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[root@centos-7 ~]# unzip iTop-2.1.0-2127.zip -d /var/www/html/itop/
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List the folder to view installation packages in it.
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[root@centos-7 ~]# ls -lh /var/www/html/itop/
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total 68K
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-rw-r--r--. 1 root root 1.4K Dec 17 2014 INSTALL
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-rw-r--r--. 1 root root 35K Dec 17 2014 LICENSE
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-rw-r--r--. 1 root root 23K Dec 17 2014 README
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drwxr-xr-x. 19 root root 4.0K Jul 14 13:10 web
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Here is all the extensions that we can install.
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[root@centos-7 2.x]# ls
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authent-external itop-backup itop-config-mgmt itop-problem-mgmt itop-service-mgmt-provider itop-welcome-itil
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authent-ldap itop-bridge-virtualization-storage itop-datacenter-mgmt itop-profiles-itil itop-sla-computation version.xml
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authent-local itop-change-mgmt itop-endusers-devices itop-request-mgmt itop-storage-mgmt wizard-icons
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installation.xml itop-change-mgmt-itil itop-incident-mgmt-itil itop-request-mgmt-itil itop-tickets
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itop-attachments itop-config itop-knownerror-mgmt itop-service-mgmt itop-virtualization-mgmt
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Now from the extracted web directory, moving through different data models we will migrate the required extensions from the datamodels into the web extensions directory of web document root directory with copy command.
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[root@centos-7 2.x]# pwd
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/var/www/html/itop/web/datamodels/2.x
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[root@centos-7 2.x]# cp -r itop-request-mgmt itop-service-mgmt itop-service-mgmt itop-config itop-change-mgmt /var/www/html/itop/web/extensions/
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### Installing iTop Web Interface ###
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Most of our server side settings and configurations are done.Finally we need to complete its web interface installation process to finalize the setup.
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Open your favorite web browser and access the WordPress web directory in your web browser using your server IP or FQDN like.
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http://servers_ip_address/itop/web/
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You will be redirected towards the web installation process for iTop. Let’s configure it as per your requirements like we did here in this tutorial.
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#### Prerequisites Validation ####
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At the stage you will be prompted for welcome screen with prerequisites validation ok. If you get some warning then you have to make resolve it by installing its prerequisites.
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At this stage one optional package named php mcrypt will be missing. Download the following rpm package then try to install php mcrypt package.
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[root@centos-7 ~]#yum localinstall php-mcrypt-5.3.3-1.el6.x86_64.rpm libmcrypt-2.5.8-9.el6.x86_64.rpm.
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After successful installation of php-mcrypt library we need to restart apache web service, then reload the web page and this time its prerequisites validation should be OK.
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#### Install or Upgrade iTop ####
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Here we will choose the fresh installation as we have not installed iTop previously on our server.
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#### iTop License Agreement ####
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Chose the option to accept the terms of the licenses of all the components of iTop and click "NEXT".
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#### Database Configuration ####
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Here we the do Configuration of the database connection by giving our database servers credentials and then choose from the option to create new database as shown.
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#### Administrator Account ####
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In this step we will configure an Admin account by filling out its login details as.
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#### Miscellaneous Parameters ####
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Let's choose the additional parameters whether you want to install with demo contents or with fresh database and proceed forward.
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### iTop Configurations Management ###
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The options below allow you to configure the type of elements that are to be managed inside iTop like all the base objects that are mandatory in the iTop CMDB, Manage Data Center devices, storage device and virtualization.
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#### Service Management ####
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Select from the choices that best describes the relationships between the services and the IT infrastructure in your IT environment. So we are choosing Service Management for Service Providers here.
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#### iTop Tickets Management ####
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From the different available options we will Select the ITIL Compliant Tickets Management option to have different types of ticket for managing user requests and incidents.
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#### Change Management Options ####
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Select the type of tickets you want to use in order to manage changes to the IT infrastructure from the available options. We are going to choose ITIL change management option here.
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#### iTop Extensions ####
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In this section we can select the additional extensions to install or we can unchecked the ones that you want to skip.
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### Ready to Start Web Installation ###
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Now we are ready to start installing the components that we choose in previous steps. We can also drop down these installation parameters to view our configuration from the drop down.
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Once you are confirmed with the installation parameters click on the install button.
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Let's wait for the progress bar to complete the installation process. It might takes few minutes to complete its installation process.
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### iTop Installation Done ###
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Our iTop installation setup is complete, just need to do a simple manual operation as shown and then click to enter iTop.
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### Welcome to iTop (IT Operational Portal) ###
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### iTop Dashboard ###
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You can manage configuration of everything from here Servers, computers, Contacts, Locations, Contracts, Network devices…. You can create your own. Just the fact, that the installed CMDB module is great which is an essential part of every bigger IT.
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### Conclusion ###
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ITOP is one of the best Open Source Service Desk solutions. We have successfully installed and configured it on our CentOS 7 cloud host. So, the most powerful aspect of iTop is the ease with which it can be customized via its “extensions”. Feel free to comment if you face any trouble during its setup.
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--------------------------------------------------------------------------------
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via: http://linoxide.com/tools/setup-itop-centos-7/
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作者：[Kashif Siddique][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/kashifs/
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[1]:http://www.combodo.com/spip.php?page=rubrique&id_rubrique=8
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Howto Configure Nginx as Rreverse Proxy / Load Balancer with Weave and Docker
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================================================================================
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Hi everyone today we'll learnHowto configure Nginx as Rreverse Proxy / Load balancer with Weave and Docker Weave creates a virtual network that connects Docker containers with each other, deploys across multiple hosts and enables their automatic discovery. It allows us to focus on developing our application, rather than our infrastructure. It provides such an awesome environment that the applications uses the network as if its containers were all plugged into the same network without need to configure ports, mappings, link, etc. The services of the application containers on the network can be easily accessible to the external world with no matter where its running. Here, in this tutorial we'll be using weave to quickly and easily deploy nginx web server as a load balancer for a simple php application running in docker containers on multiple nodes in Amazon Web Services. Here, we will be introduced to WeaveDNS, which provides a simple way for containers to find each other using hostname with no changes in codes and tells other containers to connect to those names.
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Here, in this tutorial, we will use Nginx to load balance requests to a set of containers running Apache. Here are the simple and easy to do steps on using Weave to configure nginx as a load balancer running in ubuntu docker container.
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### 1. Settting up AWS Instances ###
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First of all, we'll need to setup Amazon Web Service Instances so that we can run docker containers with Weave and Ubuntu as Operating System. We will use the [AWS CLI][1] to setup and configure two AWS EC2 instances. Here, in this tutorial, we'll use the smallest available instances, t1.micro. We will need to have a valid **Amazon Web Services account** with AWS CLI setup and configured. We'll first gonna clone the repository of weave from the github by running the following command in AWS CLI.
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$ git clone http://github.com/fintanr/weave-gs
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$ cd weave-gs/aws-nginx-ubuntu-simple
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After cloning the repository, we wanna run the script that will deploy two instances of t1.micro instance running Weave and Docker in Ubuntu Operating System.
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$ sudo ./demo-aws-setup.sh
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Here, for this tutorial we'll need the IP addresses of these instances further in future. These are stored in an environment file weavedemo.env which is created during the execution of the demo-aws-setup.sh. To get those ip addresses, we need to run the following command which will give the output similar to the output below.
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$ cat weavedemo.env
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export WEAVE_AWS_DEMO_HOST1=52.26.175.175
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export WEAVE_AWS_DEMO_HOST2=52.26.83.141
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export WEAVE_AWS_DEMO_HOSTCOUNT=2
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export WEAVE_AWS_DEMO_HOSTS=(52.26.175.175 52.26.83.141)
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Please note these are not the IP addresses for our tutorial, AWS dynamically allocate IP addresses to our instances.
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As were are using a bash, we will just source this file and execute it using the command below.
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. ./weavedemo.env
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### 2. Launching Weave and WeaveDNS ###
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After deploying the instances, we'll want to launch weave and weavedns on each hosts. Weave and weavedns allows us to easily deploy our containers to a new infrastructure and configuration without the need of changing the codes and without the need to understand concepts such as ambassador containers and links. Here are the commands to launch them in the first host.
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ssh -i weavedemo-key.pem ubuntu@$WEAVE_AWS_DEMO_HOST1
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$ sudo weave launch
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$ sudo weave launch-dns 10.2.1.1/24
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Next, we'll also wanna launch them in our second host.
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ssh -i weavedemo-key.pem ubuntu@$WEAVE_AWS_DEMO_HOST2
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$ sudo weave launch $WEAVE_AWS_DEMO_HOST1
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$ sudo weave launch-dns 10.2.1.2/24
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### 3. Launching Application Containers ###
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Now, we wanna launch six containers across our two hosts running an Apache2 Web Server instance with our simple php site. So, we'll be running the following commands which will run 3 containers running Apache2 Web Server on our 1st instance.
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ssh -i weavedemo-key.pem ubuntu@$WEAVE_AWS_DEMO_HOST1
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$ sudo weave run --with-dns 10.3.1.1/24 -h ws1.weave.local fintanr/weave-gs-nginx-apache
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$ sudo weave run --with-dns 10.3.1.2/24 -h ws2.weave.local fintanr/weave-gs-nginx-apache
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$ sudo weave run --with-dns 10.3.1.3/24 -h ws3.weave.local fintanr/weave-gs-nginx-apache
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After that, we'll again launch 3 containers running apache2 web server in our 2nd instance as shown below.
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ssh -i weavedemo-key.pem ubuntu@$WEAVE_AWS_DEMO_HOST2
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$ sudo weave run --with-dns 10.3.1.4/24 -h ws4.weave.local fintanr/weave-gs-nginx-apache
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$ sudo weave run --with-dns 10.3.1.5/24 -h ws5.weave.local fintanr/weave-gs-nginx-apache
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$ sudo weave run --with-dns 10.3.1.6/24 -h ws6.weave.local fintanr/weave-gs-nginx-apache
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Note: Here, --with-dns option tells the container to use weavedns to resolve names and -h x.weave.local allows the host to be resolvable with WeaveDNS.
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### 4. Launching Nginx Container ###
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After our application containers are running well as expected, we'll wanna launch an nginx container which contains the nginx configuration which will round-robin across the severs for the reverse proxy or load balancing. To run the nginx container, we'll need to run the following command.
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ssh -i weavedemo-key.pem ubuntu@$WEAVE_AWS_DEMO_HOST1
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$ sudo weave run --with-dns 10.3.1.7/24 -ti -h nginx.weave.local -d -p 80:80 fintanr/weave-gs-nginx-simple
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Hence, our Nginx container is publicly exposed as a http server on $WEAVE_AWS_DEMO_HOST1.
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### 5. Testing the Load Balancer ###
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To test our load balancer is working or not, we'll run a script that will make http requests to our nginx container. We'll make six requests so that we can see nginx moving through each of the webservers in round-robin turn.
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$ ./access-aws-hosts.sh
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{
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"message" : "Hello Weave - nginx example",
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"hostname" : "ws1.weave.local",
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"date" : "2015-06-26 12:24:23"
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}
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{
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"message" : "Hello Weave - nginx example",
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"hostname" : "ws2.weave.local",
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"date" : "2015-06-26 12:24:23"
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}
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{
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"message" : "Hello Weave - nginx example",
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"hostname" : "ws3.weave.local",
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"date" : "2015-06-26 12:24:23"
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}
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{
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"message" : "Hello Weave - nginx example",
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"hostname" : "ws4.weave.local",
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"date" : "2015-06-26 12:24:23"
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}
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{
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"message" : "Hello Weave - nginx example",
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"hostname" : "ws5.weave.local",
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"date" : "2015-06-26 12:24:23"
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}
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{
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"message" : "Hello Weave - nginx example",
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"hostname" : "ws6.weave.local",
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"date" : "2015-06-26 12:24:23"
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}
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### Conclusion ###
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Finally, we've successfully configured nginx as a reverse proxy or load balancer with weave and docker running ubuntu server in AWS (Amazon Web Service) EC2 . From the above output in above step, it is clear that we have configured it correctly. We can see that the request is being sent to 6 application containers in round-robin turn which is running a PHP app hosted in apache web server. Here, weave and weavedns did great work to deploy a containerised PHP application using nginx across multiple hosts on AWS EC2 without need to change in codes and connected the containers to eachother with the hostname using weavedns. If you have any questions, suggestions, feedback please write them in the comment box below so that we can improve or update our contents. Thank you ! Enjoy :-)
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--------------------------------------------------------------------------------
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via: http://linoxide.com/linux-how-to/nginx-load-balancer-weave-docker/
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作者：[Arun Pyasi][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/arunp/
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[1]:http://console.aws.amazon.com/
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