System Monitoring of SAP HANA with System Replication. This will speed up your login instead of using the openssl variant which you discribed. A shared file system (for example, /HANA/shared) is required for installation. Once the above task is performed the services running on DT worker host will appear in Landscape tab in hana studio. Recently we started receiving the alerts from our monitoring tool: More and more customers are attaching importance to the topic security. Step 1 . (2) site2 take over the primary role; Alert Name : Connection between systems in system replication setup Rating : Error Details : At 2015-08-18 18:35:45.0000000 on hostp01:30103; Site 2: Communication channel closed User Action: Investigate why connections are closed (for example, network problem) and resolve the issue. You use this service to create the extended store and extended tables. ENI-3 HANA database explorer) with all connected HANA resources! recovery. system. Any ideas? mapping rule : internal_ip_address=hostname. Therfore you first enable system replication on the primary system and then register the secondary system. Usually, tertiary site is located geographically far away from secondary site. * as internal network as described below picture. This blog provides an overview of considerations and recommended configurations in order to manage internal communication channels among scale-out / system replications. documentation. overwrite means log segments are freed by the Not sure up to which revision the "legacy" properties will work. With SAP HANA SPS 10, during installation the system sets up a PKI infrastructure used to secure the internal communication interfaces and protect the traffic between the different processes and SAP HANA hosts. Because site1 and site2 usually resides in the same data center but site3 is located very far in another data center. instances. Unregisters a system replication site on a primary system. first enable system replication on the primary system and then register the secondary First time, I Know that the mapping of hostname to IP can be different on each host in system replication relationship. So site1 & site3 won't meet except the case that I described. Thanks for the further explanation. If you've got a moment, please tell us what we did right so we can do more of it. Contact us. There are two types of network used in HANA environment: Since we have a distributed scenario here, configuration of internal network becomes mandatory for better system performance and security. You can use SAP Landscape Management for Accordingly, we will describe how to configure HANA communication channels, which HANA supports, with examples. # 2021/09/09 updated parameter info: is/local_addr thx @ Matthias Sander for the hint Configuring SAP HANA Inter-Service Communication, Configuring Hostname Resolution for SAP HANA System Replication, Configuration for logical network separation, AWS automatically applied to all instances that are associated with the security group. The below diagram depicts better understanding of internal networks: The status after internal network configuration: Once the listener interface has communication method internal, the two hosts (HANA & DT hosts) can communicate securely and their internal IP addresses reflects in parameter -> internal_hostname_resolution, Installation of Dynamic Tiering Component. The host and port information are that of the SAP HANA dynamic tiering host. Which communication channels can be secured? properties files (*.ini files). HANA System Replication, SAP HANA System Replication (3) site3 is still registered to the site2 (as it's not impacted, async only as remote DR); We used NFS storage in our case which has following requirement: The actual architecture that we followed is as follows: Dedicated host deployment with /hana/shared/ mounted on both the hosts. Would be good to have any feedback from any customers that have come across this and it will be useful for any customers that are planning to make this change in their landscape, Alerting is not available for unauthorized users. It must have a different host name, or host names in the case of The extended store can reduce the size of your in-memory database. You have performed a data backup or storage snapshot on the primary system. The customizable_functionalities property is defined in the SYSTEMDB globlal.ini file at the system level. In a traditional, bare-metal setup, these different network zones are set up by having Wanting to use predictable network device names in a custom way is going, * Two character prefixes based on the type of interface: Most will use it if no GUI is available (HANA studio / cockpit) or paired with hdbuserstore as script automatism (housekeeping). * as public network and 192.168.1. mapping rule : internal_ip_address=hostname. Each tenant requires a dedicated dynamic tiering host. Have you already secured all communication in your HANA environment? Application, Replication, host management , backup, Heartbeat. global.ini -> [communication] -> listeninterface : .global or .internal Your application automatically determines which tier to save data to: the SAP HANA in-memory store (the hot store), or extended storage (the warm store). To give context - We are using HANA SSL certificates, which are valid for 1 year and before it gets expire we need to renew it, so we want to do Monitoring to get alerts of it either by Cockpit/ Splunk or other home grown tools via Perl/any other scripting, so any one knows more about it?? Privacy | if mappings are specified as either neighboring sites(minimum) or all hosts of own site as well as neighboring sites, an internal(separate) network is used for system replication communication. In Figure 10, ENI-2 is has its By default, on every installation the system gets a systempki (self-signed) until you import an own certificate. If you want to be flexible in case of changing the server (HW change / OS upgrade), you need multiple certificates connected to different hostnames. It's free to sign up and bid on jobs. To configure your logical network for SAP HANA, follow these steps: Create new security groups to allow for isolation of client, internal need to specify all hosts of own site as well as neighboring sites. For more information about how to create and no internal interface found, listeninterface, .internal , KBA , HAN-DB , SAP HANA Database , Problem . internal, and replication network interfaces. Below query returns the internal hostname which we will use for mapping rule. The same instance number is used for network interface in the remainder of this guide), you can create Otherwise, the system performance or expected response time might not be guaranteed due to the limited network bandwidth. Perform backup on primary. Unless you are using SAPGENPSE, do not password protect the keystore file that contains the servers private key. Starts checking the replication status share. You need at You can also select directly the system view PSE_CERTIFICATES. of ports used for different network zones. Name System (DNS). You just have to set the dbs/hdb/connect_property parameter to the correct value: In some cases, you may receive an error if you force the use of TLS/SSL: You have to set some tricky parameter due to the default gateway of the Linux server. Maybe you are now asking for this two green boxes. # 2021/04/26 added PIN/passphrase option for sapgenpse seclogin Above configurations are only required when you have internal networks. alter system alter configuration ('xscontroller.ini','SYSTEM') set ('communication','jdbc_ssl') = 'true' with reconfigure; You can use the same procedure for every other XSA installation. SAP HANA attributes.ini daemon.ini dpserver.ini executor.ini global.ini indexserver.ini multidb.ini nameserver.ini statisticsserver.ini webdispatcher.ini xsengine.ini application_container auditing configuration authentication authorization backint backup businessdb cache calcengine cds . You can use the SQL script collection from note 1969700 to do this. SELECT HOST as hostname FROM M_HOST_INFORMATION WHERE KEY = net_hostnames; Internal Network Configurations in Scale-out : There are configurations youcan consider changing for internal networks. Figure 12: Further isolation with additional ENIs and security SAP HANA System, Secondary Tier in Multitier System Replication, or global.ini -> [system_replication_communication] -> listeninterface : .global or .internal SAP Note 1834153 . You modify properties in the global.ini file to prepare resources on each tenant database to support SAP HANA dynamic tiering. A separate network is used for system replication communication. well as for SAP HSR, Storage zone to persist SAP HANA data in the storage infrastructure for (1) site1 is broken and needs repair; I haven't seen it yet, but I will link it in this post.The hdbsql connect in this blog was just a side effect which I have tested due to script automatism when forcing ssl . Introduction. Download the relevant compatible Dynamic Tiering software from SAP Marketplace and extract it to a directory. SAP HANA Network Settings for System Replication 9. We are talk about signed certificates from a trusted root-CA. The datavolumes_es and logvolumes_es paths are defined in the SYSTEMDB globlal.ini file at the system level but are applied at the database level. Setting Up System Replication You set up system replication between identical SAP HANA systems. In the step 5, it is possible to avoid exporting and converting the keys. Unregisters a secondary tier from system replication. IMPORTANT : the parameters in the global.ini must be set prior to registering the secondary system which means that you need to un-register and re-register if you want to change the configurations. In particolare, la configurazione usa la replica di sistema HANA (HSR) e Pacemaker in macchine virtuali Linux (VM) di Azure Red Hat Enterprise. These steps helped resolve the issue and the System Replication monitor was now reflecting all 3 TIERS Its purpose is to extend SAP HANA memory with a disk-centric columnar store (as opposed to the SAP HANA in-memory store). We are not talking about self-signed certificates. interfaces similar to the source environment, and ENI-3 would share a common security group. Activated log backup is a prerequisite to get a common sync point for log SAP HANA Network and Communication Security Applications, including utility programs, SAP applications, third-party applications and customized applications, must use an SAP HANA interface to access SAP HANA. Network and Communication Security. There can be only one dynamic tiering worker host for theesserver process. both the SAP HANA databases on the primary and the secondary site share the same license key, identified by the System Identifier (SID) and an automatically generated hardware key. Considering the potential failover/takeover for site1 and site2, that is, site1 and site2 actually should have the same position. You have installed and configured two identical, independently-operational. shipping between the primary and secondary system. I recommend this method, but you can also use the online one (xs set-sertificate) but here you have to follow more steps/options and at the end you have to restart the XSA. For sure authorizations are also an important part but not in the context of this blog and far away from my expertise. Make sure Early Watch Alert shows a red alert at section "SAP HANA Network Settings for System Replication Communication (listeninterface)": enable_ssl, system_replication_communication, global.ini, .global, TLS, encrypted communication expected, when, off, listeninterface , KBA , HAN-DB-SEC , SAP HANA Security & User Management , HAN-DB , SAP HANA Database , SV-SMG-SER-EWA , EarlyWatch Alert , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) global.ini -> [internal_hostname_resolution] : tables are actually preloaded there according to the information # Edit Attach the network interfaces you created to your EC2 instance where SAP HANA is SAP HANA dynamic tiering is a native big data solution for SAP HANA. The XSA can be offline, but will be restarted (thanks for the hint Dennis). 2. When complete, test that the virtual host names can be resolved from Please provide your valuable feedback and please connect with me for any questions. Visit SAP Support Portal's SAP Notes and KBA Search. groups. ########. So, the easiest way is to use the XSA set-certificate command: Afterwards check your system with the diagnose function. instance, see the AWS documentation. The values are visible in the global.ini file of the tenant database but cannot be modified from the tenant database. Check also the saphostctrl functionality for the monitoring: 2621457 hdbconnectivity failure after upgrade to 2.0, 2629520 Error : hdbconnectivity (HDB Connectivity), Status: Error (SQLconnect not possible (no hdbuserstore entry found)) While SAP Host Agent is not working correctly Solution Manager 7.2, Managed systems maintenance guide preparing databases. 1761693 Additional CONNECT options for SAP HANA As you create each new network interface, associate it with the appropriate 1. 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