Azure fence agent. This package requires Azure specific Python 3.

Azure fence agent Sep 6, 2022 · Azure fence agent running on mi2scsvm1 detected a hanging VM and restarted it. Jul 10, 2024 · This article helps you troubleshoot Azure fence agent issues in a Pacemaker cluster that runs on Red Hat Enterprise Linux (RHEL) and that uses the Azure fence agent to implement a Shoot The Other Node in the Head (STONITH) device. 5. The fence agent standard provides commands (such as off and reboot) that the cluster can use to fence nodes. The article Sep 6, 2024 · Issue Azure fence agent is in a stopped state . If you are on Azure, you need to install in addition the package fence-agents-azure-arm. As with other resource agent classes, this allows a layer of abstraction so that Pacemaker doesn’t need any knowledge about specific fencing technologies – that knowledge is isolated in the agent The previous implementation of the Azure fence agent was still using Python 2. Sep 9, 2020 · Chapter 2. Azure provides several options for implementing a fence agent or STONITH Block Device. We have selected GEN2: SUSE Enterprise Linux SLES 12 SP5 OS/Image. The cloud SDK python packages were updated to be only available with Python 3. SBD overview "Stonith Block Device" (SBD) is a fencing mechanism for Pacemaker clusters where nodes exchange messages via a shared disk device. Fence agents. May 12, 2023 · The Azure Fence Agent is compared with SBD in this study, with an emphasis on the scalability, dependability, and cloud-native integration of the former. Jun 7, 2023 · Provides troubleshooting guidance for Azure fence agent issues that occur in a Red Hat Enterprise Linux (RHEL) Pacemaker cluster. 9 on SUSE Linux in Microsoft Azure Cloud using Azure NetApp Files (ANF) as storage platform for database. To see what packages are available, run dnf search fence-. GitHub Gist: instantly share code, notes, and snippets. Create a new resource group, availability set, and Linux virtual machines (VMs) Enable high availability (HA) Create a Pacemaker cluster Configure a fencing agent by creating a STONITH device Install SQL Server and mssql-tools on SLES Configure SQL Server Always On availability group Configure availability group (AG) resources in the Pacemaker cluster Test a failover and the fencing agent Jul 26, 2022 · If you have configured SAP ASCS/ERS pacemaker cluster with Azure fence agent in your production region, and want to achieve highly available configuration on DR region using ASR, refer to the blog SAP ASCS HA Cluster (in Linux OS) failover to DR region using Azure Site Recovery - Microsoft Tech Community SAP ASCS/ERS Disaster Recovery Architecture Mar 7, 2024 · Install Pacemaker and the Pacemaker Command Shell (pcs), and the Azure fencing agent for the Azure Resource Manager (ARM). through stdin when it execs the agent. As documented in SUSE - Create Azure Fence agent STONITH device, the custom role should provide permissions to the fence agent to perform the following actions: powerOff start If the virtual machine (VM) is detected as unhealthy, the fence agent uses these actions to power off the VM and then restart it. Chapter 4. Reducing effort for Nonetheless, new fence options like the Azure Fence Agent are appearing as cloud environments like Microsoft Azure become increasingly common. Contribute to ClusterLabs/fence-agents development by creating an account on GitHub. With over 20 years of experience and millions of linear feet of fence installed we are the #1 South Florida fence company A fence agent (or fencing agent) is a stonith -class resource agent. ```bash sudo zypper install fence-agents ``` > [!IMPORTANT] > The installed version of the *fence-agents* package must be 4. Actual results Fails This guide offers Red Hat's policies and requirements for using the fence_azure_arm fence agent for RHEL High Availability clusters running on Microsoft Azure platforms. Please provide the package NVR for which the bug is seen: How reproducible is this bug?: Steps to reproduce Use pcs stonith fence <node> or use fence_azure_arm manually. The Pacemaker service can start successfully after a normal restart. All 3 vms have 2 vNICs: public and private through stdin when it execs the agent. Details how to create such role are described here. There are two options available on Azure for configuring the fencing in a pacemaker cluster for RHEL: Azure fence agent, which restarts a failed node via the Azure APIs, or you can use SBD device. It discusses the pros and cons of the alternate setup with fencing only, thereby guiding the choice to the user based on cost vs recovery time trade-off. The fence agent standard provides commands (such as off and reboot) that the cluster can use to f Install the Red Hat HA Add-On packages, along with the Azure fencing agent: dnf install pcs pacemaker fence-agents-azure-arm # dnf install pcs pacemaker fence-agents-azure-arm Copy to ClipboardCopied!Toggle word wrapToggle overflow The pcs and pacemaker installation created the hacluster user in the last step. Azure fence agent requires managed identities for the cluster VMs or a service principal that manages to restart failed nodes via Azure APIs. When a failed cluster node is detected, the cluster resource agent (RA) calls this program together with the appropriate parameters to implement node fencing (also known as STONITH). This is useful for testing and for turning outlets on or off from scripts. The breakage leads to a broken SAP HA in Azure since the used fence-agents package for Azure needs the Azure SDK which is now on Python 3. 8. Azure Fence is your one stop shopping for any residential and commercial fencing needs. Expected results Doesnt fail at random. It uses Azure SDK for Python to connect to Azure. This is my current setup: A “gateway” machine accessing all 3 vms with public network. 3 days ago · Overview In Azure, you have two options for setting up fencing in the Pacemaker cluster for SLES. Red Hat Enterprise Linux (RHEL) Pacemaker クラスターで発生する Azure フェンス エージェントの問題のトラブルシューティング ガイダンスを提供します。 Aug 1, 2025 · Azure fence agent requires managed identities for the cluster VMs or a service principal that manages to restart failed nodes via Azure APIs. Jan 13, 2025 · For a Microsoft Azure Pacemaker cluster that uses the Azure Fence Agent as the STONITH (Shoot-The-Other-Node-In-The-Head) device, refer to the documentation that's provided in SUSE - Create Azure Fence agent STONITH device. Request to provide the solution. But "crmsh" and "pacemaker" package are not found even after executing "zypper update" and reboot. Oct 7, 2019 · This is the second in a four-part blog series on Designing A Great SAP on Azure Architecture. For a Microsoft Azure Pacemaker Cluster that uses the Azure Fence Agent as the STONITH (Shoot-The-Other-Node-In-The-Head) device, refer to the RHEL - Create Azure Fence agent STONITH device documentation. 6. For deploying Azure Fence agent. Update the Azure Fence agent details (new resource group) in the cluster configuration. Robust SAP on Azure Architectures are built on the pillars of Security, Performance and Scalability, Availability and Recoverability, Efficiency and Operations. fence_azure_arm accepts options on the command line as well as from stdin. Overview Important Pacemaker clusters that span multiple Virtual networks (VNets)/subnets aren't covered by standard support policies. 53 with MaxDB database version 7. The Pacemaker service doesn't start if the last startup was triggered by a SysRq action. Mar 10, 2023 · The scope of this article is to describe configurations, that will enable outbound connectivity to public end point (s). The Azure Fence Agent is compared with SBD in this study, with an emphasis on the scalability, dependability, and cloud-native integration of the former. Please use it for further development. May 15, 2023 · Introduction In this blog, we will provide steps to configure Highly available SAP Content Server 7. Configuring a Red Hat High Availability cluster on Microsoft Azure Format Multi-page Single-page View full doc as PDF Azure Fence Agent uses an Azure API-based Python program that's located at /usr/sbin/fence_azure_arm to perform VM power off or start actions. Learn to establish high availability for SAP HANA on Azure (Large Instances) in SUSE by using the fencing device. Azure fence agent timed out with repeated warning messages in corosync ‘unknown error’ and eventually failed to start the fencing agent Mar 6, 2023 · Hello Team, We are trying to set-up Pacemaker on SUSE Linux Enterprise Server in Azure with Azure Fence Agent Methos. Fence Agents ¶ A fence agent or fencing agent is a stonith -class resource agent. 11 packages, so the Public Cloud Module must be enabled. Configure the Cluster for Fencing ¶ Install the fence agent (s). Creating or modifying a new fence agent should be quite simple using this library. Be sure to install the package (s) on all cluster nodes. Aug 23, 2019 · Select the role Linux Fence Agent Role-<username> from the Role list In the Select list, enter the name of the application you created previously, <resourceGroupName>-app Sep 6, 2022 · Changing current SAP clusters using Pacemaker and Azure fencing agent from service principal names (SPN) to managed identity (MSI). As with other resource agent classes, this allows a layer of abstraction so that Pacemaker doesn’t need any knowledge about specific fencing technologies — that knowledge is isolated in the agent. Note : Azure Fence Agent requires outbound connectivity to public end points as documented, along with possible solutions, in Public endpoint connectivity for VMs using standard ILB. Because many fence agents are quite similar to each other, a fencing library (in Python) was developed. Products & Services Knowledgebase Monitor operation for the stonith resource using stonith agent fence_azure_arm gets timed out with e Jan 28, 2025 · It could make the fence agent unable to fence nodes intermittently, or worst case the node wont get fenced at all. Configure the fence device itself to be able to fence your nodes and accept fencing requests. 3. Feb 17, 2021 · Assign the custom role to the Service Principle for the DR VMs as per the link. Create a high availability Oracle Linux cluster in Azure. If you are using Pacemaker with Azure fence agent in your high availability solution, then the VMs must have outbound connectivity to the Azure management API. . Nov 10, 2021 · In Azure, we either use a "STONITH Block Device" (SBD) or Azure Fencing agent for STONITH. This package requires Azure specific Python 3. Oct 29, 2025 · From the ClusterLabs definition: A fence agent(or fencing agent) is a stonith-class resource agent. Fenced sends parameters through stdin when it execs the agent. This issue is caused by a conflict between the STONITH Block Device (SBD) msgwait time and the fast restart time of these Azure virtual machines (VMs), as specified in the /etc/sysconfig/sbd file: ** [A]** Install the *fence-agents* package if you're using a fencing device, based on the Azure fence agent. One popular choice is to use the Azure Fencing Agent, which leverages the Azure API to power off and restart virtual machines (VMs). fence_azure_arm can be run by itself with command line options. This includes any necessary configuration on the device and on the nodes, and any firewall or SELinux changes Jun 7, 2024 · For cluster operation, Azure documentation recommends using a custom role for the fence agent. Azure fence agent doesn't require the deployment of additional virtual machines. With the new fence_azure_arm agent being available, the following procedure has to be used to enable its functionality: Install latest patches and reboot the instance Apr 30, 2025 · This document provides an alternate Db2 Pacemaker configuration without using a third lightweight host as a quorum device (Qdevice) arbitrator. 4. Useful References and Guides Support Policies for RHEL High Availability Clusters Support Policies for RHEL High Availability clusters - fence_azure_arm Administrative Procedures - Installing and configuring a Red Hat Enterprise Linux 7. The configurations are mainly in the context of High Availability with Pacemaker for SUSE / RHEL. For a Microsoft Azure Pacemaker cluster that uses the Azure Fence Agent as the STONITH (Shoot-The-Other-Node-In-The-Head) device, refer to the documentation that's provided in SUSE - Create Azure Fence agent STONITH device. The package was split, and a new package, fence-agents-azure-arm, was introduced specifically for the Azure fence agent. Nov 29, 2023 · Tutorial: Configure availability groups for SQL Server on SLES virtual machines in Azure For SUSE Linux Enterprise Server (SLES), you can use either Azure fence agent or STONITH Block Device (SBD). Configuring Red Hat High Availability clusters on Microsoft Azure Format Multi-page Single-page View full doc as PDF Azure Pacemaker Fencing - RHEL 8 Hello All, Just a quick question, we had 2 VMs clustered using PACEMAKER in Azure, one node encountered a network issue caused by azure and triggered the fencing for node 1 and node 2 also detected that node 1 is unclean so both nodes triggered fencing. What needs to be done? Environment Red Hat Enterprose Linux 8 fence_azure_arm is a Power Fencing agent for Azure Resource Manager. Figure 6 - Activity log of cluster testing with both SPN and MSI, showing differences. You can use an Azure fence agent, which restarts a failed node via the Azure APIs, or you can use SBD device. Sep 2, 2020 · This is a small procedure to install 3 Pacemaker + Corosync nodes called “vm01, vm02 and vm03” in Microsoft Azure AND configure fencing_azure_arm agent, available in Ubuntu Bionic, to fence the virtual nodes in case of something goes bad in your HA cluster. If the fence agent that is being tested is a fence_drac, fence_ilo, or some other fencing agent for a systems management device that continues to fail, then fall back to trying fence_ipmilan. Compare the failover times for each solution and, if there's a difference, choose a solution based on your business requirements for recovery time objective (RTO). It uses SUSE High Availability Extension tool set (Pacemake Azure Fence Agent の構成に加えて以下のオプションの手順を実行し、第 1 レベルのフェンス構成として fence_kdump を追加します。 Sep 25, 2025 · Select the role Linux Fence Agent Role-<username> from the Role list In the Select list, enter the name of the application you created previously, <resourceGroupName>-app The operations fail on fence_rhevm agent due to errors below: Nov 25 20:15:59 node-1 pacemaker-fenced [1460]: notice: Operation 'monitor' [2195] using rhevm8 could not be executed: Timed Out (Fence The previous implementation of the Azure fence agent was still using Python 2. 4 (and later)High Availability cluster on Microsoft Azure Introduction The updated fence-agents does not include anymore the Azure fence-agents. 0 or later to benefit from the faster failover times with the Azure fence agent, when a cluster node is fenced. Issue The stonith agent fence_azure_arm configured in pacemaker cluster fails to start with below messages: Products & Services Knowledgebase fence_azure_arm stonith devices are in stopped state and unable to start. khavi ryzi ufwk woyv keors ubwv zciuxd potihjl xemrtq fqjgbr mtns zvrqw tdarynq gmjm ezqbs