Configure High Avaliablity Cluster on Cent. OS 7 RHEL 7. High Availability cluster aka Failover cluster active passive cluster is one of the most widely used cluster types in the production environment. Add Bridge Failed Package Not Installed Centos Linux' title='Add Bridge Failed Package Not Installed Centos Linux' />This type of cluster provides you the continued availability of services even one of the node from the group of computer fails. If the server running application has failed for some reason hardware failure, cluster software pacemaker will restart the application on another node. CyanogenMod s a. n. AnoGENmod CM is a discontinued popular opensource operating system for mobile devices, based on. Using Puppet 3. x or 4. Puppet Labs repositories. The version in Ubuntu 14. How to Install, Setup, Config OpenVPN on CentOS 6. In this page I write full tutorial to guide you installing OpenVPN on CentOS 6. I will try all the. Feed aggregator of hand picked System Administration, Information Technology, and Information Security related blogs. Mostly in production, you can find this type of cluster is mainly used for databases, custom application and also for file sharing. Fail over is not just starting an application it has some series of operations associated with it like mounting filesystems, configuring networks and starting dependent applications. Cent. OS 7 RHEL 7 supports Fail over cluster using the pacemaker, we will be looking here about configuring the apache web server as a highly available application. As I said, fail over is a series of operations, so we would need to configure filesystem and networks as a resource. For a filesystem, we would be using a shared storage from i. SCSI storage. Our Environment Configure High Availability Cluster on Cent. OS 7 Infrastructure. Cluster Nodes node. SCSI Storage server. All nodes are of Cent. Install-PHP-mbstring-in-CentOs-7.png' alt='Add Bridge Failed Package Not Installed Centos Linux' title='Add Bridge Failed Package Not Installed Centos Linux' />DRATS is a DSTAR communications tool that supports text chat, TCPIP forwarding, file transfers, and can act as an email gateway. There is also the ability to map. OS Linux release 7. Core, running on VMware workstation. Building Infrastructure i. SCSI shared storage Shared storage is one of the important resources in the high availability cluster, it holds the data of a running application. All the nodes in a cluster will have access to shared storage for recent data, SAN is the most widely used shared storage in the production environment here, we will configure a cluster with i. SCSI storage for a demonstration purpose. Here, we will create 1. GB of LVM disk on the i. SCSI server to use as a shared storage for our cluster nodes. Lets list the available disks attached to the target server using the command. Disk devsda 1. GB, 1. Linux. devsda. 2 1. Linux LVM. Disk devsdb 1. GB, 1. 07. 37. 41. From the above output, you can see that my system has a 1. GB of disk devsdb. Create an LVM with devsdb replace devsdb with your disk namerootserver pvcreate devsdb. FREE n lviscsi vgiscsi. In this tutorial I will describe in detail how to set up a distributed, multinode Storm cluster on RHEL 6. We will install and configure both Storm and ZooKeeper and. HighAvailability cluster aka Failovercluster activepassive cluster is one of the most widely used cluster types in the production environment. This type of. With this flexibility, Karaf is the perfect solution for microservices, systems integration, big data, and much more. PHP SQL Server Prerequisites. To connect PHP on UNIXLinux with SQL Server, we used PHP 4. Apache 2. 0 or later. SQL Server ODBC driver. Creating i. SCSI target Install the targetcli package on the server. Once you installed the package, enter below command to get an i. SCSI CLI for an interactive prompt. Warning Could not load preferences file root. Copyright 2. 01. 1 2. Datera, Inc and others. For help on commands, type help. Created block storage object iscsisharedstorage using devvgiscsilviscsi. Created target iqn. Global pref autoadddefaultportaltrue. Created default portal listening on all IPs 0. Created Node ACL for iqn. Parameter authentication is now 0. Parameter generatenodeacls is now 1. Created LUN 0 0 mapping in node ACL iqn. Storage Objects 1. Gi. B write thru activated. Storage Objects 0. Storage Objects 0. Storage Objects 0. Targets 1. o iqn. TPGs 1.    o tpg. ACLs 1.      o iqn. Mapped LUNs 1.         o mappedlun. LUNs 1.      o lun. Portals 1.        o 0. OK. o loopback . Targets 0. saveconfig. Last 1. 0 configs saved in etctargetbackup. Configuration saved to etctargetsaveconfig. Global pref autosaveonexittrue. Last 1. 0 configs saved in etctargetbackup. Configuration saved to etctargetsaveconfig. Enable and restart the target service. Configure the firewall to allow i. SCSI traffic. rootserver firewall cmd permanent add port3. Configure Initiator Its the time to configure cluster nodes to make a use of i. Philadelphia Mural Arts Program Internship. SCSI storage, perform below steps on all of your cluster nodes. Discover the target using below command. Edit below file and add iscsi initiator name. Initiator. Nameiqn. Login to the target. T iqn. Logging in to iface default, target iqn. Login to iface default, target iqn. Restart and enable the initiator service. Setup Cluster Nodes Go to all of your nodes and check whether the new disk is visible or not. In my case, devsdb is the new disk. Disk devsda 1. GB, 1. Linux. devsda. 2         1. Linux LVM. Disk devsdb 1. GB, 1. 07. 33. 22. On any one of your node Ex, node. LVM using below commandsrootnode. FREE vgapache. rootnode. Now, go to your remaining nodes and run below commandsrootnode. Finally, verify the LV we created on node. Ex. node. 2 using below command. You should see devvgapachelvapache on all your nodes. Output Logical volume. LV Path devvgapachelvapache. LV Name lvapache. VG Name vgapache. LV UUID UDux. VKXO pjg. X J2m. E M0. U0 EO4r q. P2ziq. LV Write Access readwrite. LV Creation host, time node. LV Status available. LV Size 1. Gi. B. Current LE 2. Segments 1. Allocation inherit. Read ahead sectors auto. Block device 2. Make a host entry on each node for all nodes, the cluster will be using the host name to communicate each other. Perform tasks on all of your cluster nodes. Install cluster packages pacemaker on all nodes using below command. Allow all high availability application on the firewall to have a proper communication between nodes, you can skip this step if the system doesnt have firewalld installed. Use below command to list down the allowed applications in the firewall. Set password for hacluster user, this is cluster administration account. We suggest you set the same password for all nodes. Start the cluster service, also, enable it to start automatically on system startup. Remember to run the above commands on all of your cluster nodes. Cluster Creation Authorize the nodes using below command, run the command in any one of the node. Username hacluster. Authorized. node. Authorized. Create a cluster. Shutting down pacemakercorosync services. Redirecting to binsystemctl stop  pacemaker. Redirecting to binsystemctl stop  corosync. Killing any remaining services. Removing all cluster configuration files. Succeeded. node. 2. Succeeded. Starting cluster on nodes node. Starting Cluster. Starting Cluster. Synchronizing pcsd certificates on nodes node. Success. node. 2. Success. Restaring pcsd on the nodes in order to reload the certificates. Success. node. 2. Success. Enable the cluster to start at the system startup, else you will need to start the cluster on every time you restart the system. Cluster Enabled. node. Cluster Enabled. Use below command to get the status of the cluster. Cluster Status. Last updated Fri Mar 2. Last change Fri Mar 2. Stack corosync. Current DC node. Online node. 1. Online. Online. Run the below command to get a detailed information about the cluster including its resources, pacemaker status, and nodes details. Cluster name itzgeekcluster. Foreman Manual. Foreman 1. Manual. Foreman Architecture. A Foreman installation will always contain a central foreman instance. Web based GUI, node. However, if the. foreman installation supports unattended installations then other. The. smart proxy manages remote services and is generally installed with all. Foreman installations to manage TFTP, DHCP, DNS, Puppet, Puppet CA. Ansible, Salt, and Chef. Smart Proxy. A Smart Proxy is located on or near a machine that performs a specific function and helps foreman orchestrate the process of commissioning a new host. Placing the proxy on or near to the actual service will also help reduce latencies in large distributed organizations. Release notes for 1. Headline features. Default owner for new hosts. A new setting Host Owner under Administer Settings allows to set an default owner for newly provisioned hosts. The default owner can be a user or an user group, and the feature can be disabled if it is not needed. Introduced notification drawer. With all the information Foreman has about infrastructure, the new notifications system is meant to help you get that information proactively. The notifications drawer can warn you about important events happening in Foreman, and proactively help to resolve any operational issues. This version contains a preliminary version with limited notifications, which are expected to grow in number in future releases. Template locking. In order to avoid unexpected changes in your templates, now you can lock them. This means only people with permission to unlock templates can modify them, other users would have to clone them. The templates shipped with Foreman via community templates will make use of this feature from this release on. This means the templates that come from Foreman will come locked and will be updated automatically in every release. If you want to modify the default templates, it is recommended to clone them and make your own custom templates. CSV export of tables. An effort to export the tables you see in the UI to CSV has begun. For this release, the tables for fact values, hosts and reports can be exported to CSV and read by anything that supports this format. Import hosts from compute resource. A long wanted feature, now it is possible to just add a connection to a Compute Resource EC2, Rackspace, VMWare and import any or all your hosts to Foreman. SSH keys deployed per user. SSH by automatically adding the SSH keys from the user or user group that creates the host. These keys are also available to be used in templates and as part of the ENC data. Release notes for 1. APIClone roles from the API 1. Provide compute resource provider name in the API 1. Option to showhide hidden values for display 1. Audit log. Password change activity does not show in Audit log 1. Authentication and Authorization. Foreman role permission violations are not logging 1. DHCPUsing a bonded interface as a provision interface provisions DHCP for all child macs 1. Compute resources and Hosts creation. Ability to import and provision existing VMs 1. Add ability to get private keys or use existing key pairs when provisioning on EC2 1. Support for multiple certificates in ca. Virt 1. 22. 72Adding VMware v. Sphere Disk Mode support 1. VMware vm saved with firmware set to automatic if no firmware is passed 1. Make volume size editable for existing VMs on VMware 1. Provision thick disks from thin templates on VMWare 1. Update CPUs and memory on VMWare 4. Facts, reporting and parameters. Expire facts based on fact name 1. Add options to ignore facts for operating system or domain 6. Orchestration. Allow rebuild of specific configurations TFTP, DHCP, DNS, etc via API 1. Organizations and locations. Fix behavior when no organization or no location is set 1. Performance. Improve host index listing performance 1. Proxy and Services. Allow proxy to listen on arbitrary interfaces 1. Unify removal of non existing record by DHCP providers 1. Security. CVE 2. User with no organizations or locations can see all resources 1. Settings. Allow ERB based files 1. TFTPUsing a bonded interface as a provision interface provisions TFTP for all child macs 1. Various fixes and features. Fix 4. 14 when manipulating entities with long name 1. A full list of changes in 1. Redmine. Release notes for 1. Audit log. Fix audits no longer visible in 1. Compute resources. FixActive. Record Record. Not. Saved when deleting compute resources with key pairs 1. Compute resources o. VirtRHEVFixunable to delete Host in Foreman which has been delete in RHEV already 1. DHCPFix rename temporary lease hostname 1. Fix DHCP reservation returns null string 1. Host creation. Fix Katello needs foremans osselected method to submit all form data 1. Logging. Fix excessive amount of log messages about db encryption 1. Notifications. Added a task for clearing expired notifications 1. Packaging. Fix pin roadie rails for Ruby lt 2. Rake tasks. Fix set User. Rails console 1. Security. Fix CVE 2. User scoped in organization with permissions for user management can manage administrators that are not assigned to any organization 1. Templates. Fix kickstartifcfggenericinterface template is broken 1. Unattended installations. Fix foremanurl does not respect provision interface 1. Web interface. Fix plugins adding host bulk actions 1. Release notes for 1. Authorization. FixForeman is not starting when fixdbcache is set 1. Compute resources o. VirtRHEVFixRHEV failed to load template configuration data 2. Database. Fixfixdbcache needs to run with admin permissions 2. Email. Fixtest email button required excessive privileges 1. Fixmail notifications not being sent 2. Hostgroup. Fixunqualified search on host group page results on OOM2. Internationalization. Fix Notification blueprint seed does not i. Plugins interface. Fixplugins can break migrations by calling addallpermissionstodefaultroles 1. Templates. Fixincorrect kind for Preseed default PXEGrub. Tests. Fixretry various integration tests before failing 2. Fixtest for mail notifications has wrong string2. Users. Fixrole clone API fails for roles with organizationslocations assigned 1. Create role for OrganizationLocation administrator 2. Fix SSH key creation in User throws error 2. Web interface. Fix new role warning on filters tab should not be closeable 2. Release notes for 1. Audits. Fixes audit entries for oauthconsumersecret are hidden 1. Compute resources o. VirtRHEVFixes select image in RHEV compute profile 2. Compute resources v. Sphere. Fixes unable to select the latest VMWare ESXi hardware version when deploying a new machine 2. Foreman debug. Fixes make foreman debug aware of Puppet 4 1. Fixes foreman debug does not preserve timestamps of log files 1. Host creation. Fixes image list under operating system tab is now sorted 1. Fixes compute profiles in host group arent filtered by user permissions 2. Fixes when cloning a host build mode is off 2. Inventory. Fixes POST apiv. Fixes exporting list of all hosts into CSV file does not insert Environment, Host group and Model 2. Importers. Fixes slow exec of deleteremovedfacts 1. Installer. Provide a more secure apache ssl. Organizations and Locations. Fixes user searching by login should use unscoped 2. Fixes cannot use foreman rake import puppetclasses 2. Permissions. Fixes some core permissions missing from Manager and Organization admin roles 2.