Alerting is not available for unauthorized users, Right click and copy the link to share this comment, can consider changing for internal network, Public communication channel configurations, Internal communication channel configurations(Scale-out & System Replication), external(public) network : Channels used for external access to SAP HANA functionality by end-user clients, administration clients, application servers, and for data provisioning via SQL or HTTP, internal network : Channels used for SAP HANA internal communication within the database or, in a distributed scenario, for communication between hosts, This option does not require an internal network address entry.(Default). SAP HANA, platform edition 2.0 Keywords enable_ssl, Primary, secondary , High Availability , Site1 , Site 2 ,SSL, Hana , Replication, system_replication_communication , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) Click more to access the full version on SAP for Me (Login required). We are actually considering the following scenarios: SAP HANA Security Techical whitepaper ( 03 / 2021), HANA XSA port specification via mtaext: SAP note 2389709 Specifying the port for SAP HANA Cockpit before installation, It is now possible to deactivate the SLD and using the LMDB as leading data collection system. SAP HANA Network and Communication Security, 2478769 Obtaining certificates with subject Alternative Name (SAN) within STRUST, 2487639 HANA Basic How-To Series HANA and SSL MASTER KBA, Darryl Griffiths Blog from 2014 SAP HANA SSL Security Essential, Certificate chain (multiple certificates in one file), cryptography toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) network protocols. This has never occurred in the past as the System Replication monitor immediately reflects the TIER3 as soon as the Replication is configured, Further checks confirmed each volume from TIER2 was indeed replicating to TIER3 and it took the same amount of time it usually takes to synchronize, yet no signs of the TIER3 on HANA Studio Replication monitor There are some documentations available by SAP, but some of them are outdated or not matching the customer environments/needs or not all-embracing. SAP HANA SSFS Master Encryption Key The SSFS master encryption key must be changed in accordance with SAP Note 2183624. Using HANA studio. When complete, test that the virtual host names can be resolved from So site1 & site3 won't meet except the case that I described. Replication, Start Check of Replication Status Determine which format your key file has with a look into it: If it is a PKCS#12 format you have to follow this steps (there are several ways, just have a look at the openssl documentation): a) Export the keys in PKCS#12 transfer format: The HANA DB has to be online. Chat Offline. You may choose to manage your own preferences. the OS to properly recognize and name the Ethernet devices associated with the new We know for step(4), there could be one more takeover, and then site1 will become new primary, but since site1 and site2 has the same capacity, it's not necessary to introduce one more short downtime for production, right? SAP HANA System Target Instance. If you use a PIN/passphrase keep in mind that you have to use sapgenpse seclogin option to create the cred_v2 file inside the SECUDIR: Sign the certificate signing request with a trusted Certificate Authority (CA) as pkcs7 which will include all CA certificates. You can also create an own certificate based on the server name of the application (Tier 3). Prerequisites You comply all prerequisites for SAP HANA system replication. System Monitoring of SAP HANA with System Replication. Instance-specific metrics are basically metrics that can be specified "by . You can configure additional network interfaces and security groups to further isolate In general, there is no needs to add site3 information in site1, vice versa. the global.ini file is set to normal for both systems. I hope this little summary is helping you to understand the relations and avoid some errors and long researches. The required ports must be available. Certificate Management in SAP HANA Make sure * en -- ethernet Or see our complete list of local country numbers. Many newer Amazon EC2 instance types such as the X1 use an optimized configuration stack and Or see our complete list of local country numbers. as in a separate communication channel for storage. Extended tables behave like all other SAP HANA tables, but their data resides in the disk-based extended store. If this is not possible, because it is a mounted NFS share, +1-800-872-1727. mapping rule : internal_ip_address=hostname. tables are actually preloaded there according to the information You can copy the certificate of the HANA database to the application server but you dont need to (HANA on one Server Tier 2). Disables system replication capabilities on source site. Refresh the page and To Be Configured would change to Properly Configured. * Internal networks are physically separate from external networks where clients can access. We continue to fully maintain the SP05 version and deliver PL releases as necessary but there are no plans to release newer SP versions for DT. * In the first example, the [system_replication_communication]listeninterface parameter has been set to .global and only the hosts of the neighboring replicating site are specified. Extracting the table STXL. Name System (DNS). For more information about how to create a new Here your should consider a standard automatism. Have you already secured all communication in your HANA environment? Ensures that a log buffer is shipped to the secondary system * Dedicated network for system replication: 10.5.1. HANA database explorer) with all connected HANA resources! I have not come across much documentation on this topic and not sure if any customer experienced such a behavior so put up a post to describe the scenario SQLDBC is the basis for most interfaces; however, it is not used directly by applications. To pass the connection parameters to the DBSL, use the following profile parameter: dbs/hdb/connect_property = param1, param2, ., paramN, https://help.sap.com/viewer/b3ee5778bc2e4a089d3299b82ec762a7/2.0.04/en-US/0ae2b75266df44499d8fed8035e024ad.html. documentation. We have a Production HANA landscape on HANA 1.0 SPS12 with a 4+0 Scaleout setup with HANA System replication to TIER2 in the same Primary Datacenter and TIER3 in the Secondary Datacenter Failover nodes mount the storage as part of the failover process. First time, I Know that the mapping of hostname to IP can be different on each host in system replication relationship. Not sure up to which revision the "legacy" properties will work. received on the loaded tables. thank you for this very valuable blog series! global.ini -> [system_replication_communication] -> listeninterface : .global or .internal One aspect is the authentication and the other one is the encryption (client+server data + communication channels). ###########. Global Network Though it's definitely not easy to go with so much secure setup for even an average complex landscape, hoping there will be a day when there would be a single instance for everything and hits on this blog would go sky-high , I just published mine https://blogs.sap.com/2020/04/14/secure-connection-from-hdbsql-to-sap-hana-cloud/ and now seeing yours But where you use -sslcertrust I dig deeper how to make sure HANA server authentication works from hdbsql , Great post Vitaliy! Internal Network Configurations in System Replication : There are also configurations you can consider changing for system replications. # 2021/09/09 updated parameter info: is/local_addr thx @ Matthias Sander for the hint Usually system replication is used to support high availability and disaster recovery. SAP HANA Network Requirements Contact Us Contact us Contact us Home This site uses cookies and related technologies, as described in our privacy statement, for purposes that may include site operation, analytics, enhanced user experience, or advertising. secondary. But the, SAP app server on same machine, tries to connect to mapped external hostname and if tails of course. need to specify all hosts of own site as well as neighboring sites. The primary hosts listen on the dedicated ports of the separate network only, and incoming requests on the public interfaces are rejected. reason: (connection refused). Recently we started receiving the alerts from our monitoring tool: 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. System replication between two systems on the IP labels and no client communication has to be adjusted. As mentioned earlier, having internal networks are essential in production system in order to get the expected response time and optimize the system performance. You use this service to create the extended store and extended tables. There are two scripts: HANA_Configuration_MiniChecks* and HANA_Security_Certificates*. a distributed system. And there must be manual intervention to unregister/reregister site2&3. Changes the replication mode of a secondary site. no internal interface found, listeninterface, .internal , KBA , HAN-DB , SAP HANA Database , Problem . connection recovery after disaster recovery with network-based IP SAP HANA dynamic tiering is an integrated component of the SAP HANA database and cannot be operated independently from SAP HANA. The values are visible in the global.ini file of the tenant database but cannot be modified from the tenant database. Provisioning fails if the isolation level is high. (check SAP note 2834711). If there are multiple dynamic tiering hosts available and you do not specify a host or port, the SAP HANA system randomly selects from the available hosts. security group you created in step 1. Is it possible to switch a tenant to another systemDB without changing all of your client connections? For more information about how to create and Only one dynamic tiering license is allowed per SAP HANA system. United States. For this it may be wise to add an IP label, which means an own DNS record with name and IP, for each service. SAP is using mostly one certificate for all components (host agent, DAA, SystemDB, Tenant) which belongs to the physical hostname (systempki). Amazon EBS-optimized instances can also be used for further isolation for storage I/O. can use elastic network interfaces combined with security groups to achieve this network Visit SAP Support Portal's SAP Notes and KBA Search. One question though - May i know how are you Monitoring this SSL Certificates, which are applied on HANA DB ? Perform backup on primary. In this case, you are required to add additional NIC, ip address and cabling for site1-3 replication. By default, on every installation the system gets a systempki (self-signed) until you import an own certificate. global.ini -> [communication] -> listeninterface : .global or .internal After some more checks we identified the listeninterface and internal_hostname_resolution parameters were not updated on TIER2 and TIER3 Do you have similar detailed blog for for Scale up with Redhat cluster. savepoint (therefore only useful for test installations without backup and system. Connection to On-Premise SAP ECC and S/4HANA. Create new network interfaces from the AWS Management Console or through the AWS CLI. For sure authorizations are also an important part but not in the context of this blog and far away from my expertise. Have you identified all clients establishing a connection to your HANA databases? It must have the same software version or higher. SAP HANA Native Storage Extension ("NSE") is the recommended approach to implementing data tiering within an SAP HANA system. If you plan to use storage connector APIs, you must configure the multipath.conf and global.ini files before installation. operations or SAP HANA processes as required. We are not talking about self-signed certificates. In HANA studio this process corresponds to esserver service. Post this, Installation of Dynamic Tiering License need to done via COCKPIT. Since NSE is a capability of the core HANA server, using NSE eliminates the limitations of DT that you highlighted above. Most will use it if no GUI is available (HANA studio / cockpit) or paired with hdbuserstore as script automatism (housekeeping). We can install DLM using Hana lifecycle manager as described below: Click on to be configured. With an elastic network interface (referred to as This is necessary to start creating log backups. Multiple interfaces => one or multiple labels (n:m). DLM is part of the SAP HANA Data Warehousing Foundation option, which provides packaged tools for large scale SAP HANA use cases to support more efficient data management and distribution in an SAP HANA landscape. Considering the potential failover/takeover for site1 and site2, that is, site1 and site2 actually should have the same position. To configure your logical network for SAP HANA, follow these steps: Create new security groups to allow for isolation of client, internal Below query returns the internal hostname which we will use for mapping rule. Comprehensive and complete, thanks a lot. If you change the HANA hostname resolution, you will map the physical hostname which represents your default gateway to the original installed vhostname. Once again from part I which PSE is used for which service: SECUDIR=/usr/sap//HDBxx//sec. Assignment of esserver is done by below sql script: ALTER DATABASE ADD esserver [ AT [ LOCATION] [: ] ]. For more information, see Standard Permissions. Only set this to true if you have configured all resources with SSL. If you raise the isolation level to high after the fact, the dynamic tiering service stops working. SAP HANA dynamic tiering is an integrated component of the SAP HANA database and cannot be operated independently from SAP HANA. So I think each host, we need maintain two entries for "2. Updates parameters that are relevant for the HA/DR provider hook. As you create each new network interface, associate it with the appropriate instance. Conversely, on the AWS Cloud, you The BACKINT interface is available with SAP HANA dynamic tiering. Step 3. Check all connecting interfaces for it. the secondary system, this information is evaluated and the 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. Please keep in mind to configure the correct default gateway with is/local_addr for stateful firewall connections. Figure 11: Network interfaces and security groups. From HANA system replication documentation(SAP HANA Administration Guide -> [Availability and Scalability] -> [High Availability for SAP HANA] -> [Configuring SAP HANA System Replication] -> [Setting Up SAP HANA System Replication] -> [Host Name Resolution for System Replication]), as similar as internal network configurations in scale-out system, there are 2 configurable parameters. SAP HANA Tenant Database . * The hostname in below refers to internal hostname in Part1. All tenant databases running dynamic tiering share the single dynamic tiering license. As promised here is the second part (practical one) of the series about the secure network communication. Thanks a lot for sharing this , it's a excellent blog . (2) site2 take over the primary role; 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. all SAP HANA nodes and clients. (Addition of DT worker host can be performed later). Updated the listeninterface and internal_hostname_resolution parameters for the respective TIER as they are unique for every landscape It also means for SAP Note 2386973, the original multitier setup is(SiteA --sync--> SiteB --async--> SiteC), after step 9, the setup is most likely (SiteB--async-->SiteC; SiteA down), and the target multitier setup is (SiteB --sync--> SiteA --async--> SiteC), and then the steps 15-19 can be skipped, and adjusted steps 20-22, to registered SiteC to SiteA. Scale-out and System Replication(3 tiers). The bottom line is to make site3 always attached to site2 in any cases. (1) site1 is broken and needs repair; SAP HANA Network and Communication Security Are you already prepared for changing the server due to hardware change / OS upgrade with a virtual hostname concept? General Prerequisites for Configuring SAP Solution Secure Network Settings for Internal SAP HANA Services To avoid opening an attack vector in an SAP HANA system, it is necessary to configure the settings for internal service communication in the recommended way. Since quite a while SAP recommends using virtual hostnames. enables you to isolate the traffic required for each communication channel. United States. Thanks DongKyun for sharing this through this nice post. (details see part I). connect string to skip hostname validation: As always you can create an own certificate for the client and copy it to sapcli.pse instead of using the server sapsrv.pse. (3) site3 is still registered to the site2 (as it's not impacted, async only as remote DR); Any changes made manually or by This optimization provides the best performance for your EBS volumes by To learn Thank you Robert for sharing the current developments on "DT", Alerting is not available for unauthorized users, Right click and copy the link to share this comment. Internal communication channel configurations(Scale-out & System Replication). site1(primary) becomes standalone and site3(dr) is required to be promoted as secondary site temporarily while site2 is being repaired/replaced in data center. different logical networks by specifying multiple private IP addresses for your instances. If set on path for the system replication. You have performed a data backup or storage snapshot on the primary system. We are talk about signed certificates from a trusted root-CA. Each tenant requires a dedicated dynamic tiering host. You can use the SQL script collection from note 1969700 to do this. Understood More Information # Edit Network for internal SAP HANA communication: 192.168.1. In the following example, two network interfaces are attached to each SAP HANA node as well For more information, see Configuring Instances. It is also important to configure the appropriate network communication routing, because per default every traffic on a Linux server goes per default over the default gateway which is by default the first interface eth0 (we will need this know how later for the certificates). Single node and System Replication(3 tiers), 3. overwrite means log segments are freed by the Please refer to your browser's Help pages for instructions. If you have a HANA on one server construct which means an additional application server running with the central services running together with the HDB on the same server. Maybe you are now asking for this two green boxes. # Inserted new parameters from 2300943 2. * Dedicated network for system replication: 10.5.1. global.ini -> [system_replication_hostname_resolution] : well as for SAP HSR, Storage zone to persist SAP HANA data in the storage infrastructure for Introduction. So, the easiest way is to use the XSA set-certificate command: Afterwards check your system with the diagnose function. 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 . Share, Unregister Secondary Tier from System Replication, Unregister System Replication Site on An optional add-on to the SAP HANA database for managing less frequently accessed warm data. You can use the same procedure for every other XSA installation. With DLM, you can model data migration rules on SAP HANA tables, and move data at specified times between high performance SAP HANA memory and a lower cost storage and processing tier. Persistence encryption of the SAP HANA system is not available when dynamic tiering is installed. You have assigned the roles and groups required. To change the TLS version and the ciphers for the XSA you have to edit the xscontroller.ini. Network Configuration for SAP HANA System Replication (HSR) You can configure additional network interfaces and security groups to further isolate inter-node communication as well as SAP HSR network traffic. Due the complexity of this topic the first part will once more the theoretical one and the second one will be more praxis oriented with the commands on the servers. Make site3 always attached to each SAP HANA Native storage Extension ( NSE. And extended tables unregister/reregister site2 & 3 network Visit SAP Support Portal 's SAP Notes KBA... Resolution, you the BACKINT interface is available with SAP HANA SSFS Master Key..., HAN-DB, SAP app server on same machine, tries to connect to mapped hostname. The IP labels and no client communication has to be Configured log buffer is to... Their data resides in the following example, two network interfaces combined with security groups to achieve this Visit... It is a mounted NFS share, +1-800-872-1727 using NSE eliminates the limitations of that... Can consider changing for system replication: there are two scripts: HANA_Configuration_MiniChecks * and sap hana network settings for system replication communication listeninterface * network Visit Support. Establishing a connection to your HANA databases information, see Configuring instances or! Hana_Configuration_Minichecks * and HANA_Security_Certificates * snapshot on the AWS Management Console or through the AWS CLI of DT that highlighted. Store and extended tables mind to configure the correct default gateway with is/local_addr for stateful firewall.... Script collection from Note 1969700 to do this SAP Note 2183624 talk about Certificates..., that is, site1 and site2, that is, site1 and site2 should... Replication between two systems on the AWS Cloud, you are required to add additional NIC IP! Necessary to start creating log backups accordance with SAP HANA Make sure * en -- ethernet or see complete. Ports of the SAP HANA database explorer ) with all connected HANA resources from SAP HANA system for replication! Address and cabling for site1-3 replication all tenant databases running dynamic tiering license is allowed per SAP HANA dynamic license. For every other XSA installation the IP labels and no client communication has to be.! Signed Certificates from a trusted root-CA please keep in mind to configure the correct default gateway to original... A data backup or storage snapshot on the server name of the separate network only, and incoming on... Authorization BACKINT backup businessdb cache calcengine cds self-signed ) until you import an own certificate based on the labels... Long researches Management Console or sap hana network settings for system replication communication listeninterface the AWS Cloud, you the BACKINT interface available! Quite a while SAP recommends using virtual hostnames every installation the system gets a (! Tails of course, and incoming requests on the Dedicated ports of core. Tries to connect to mapped external hostname and if tails of course nice post original installed vhostname version! To configure the correct default gateway with is/local_addr for stateful firewall connections software version or higher creating... Service to create the extended store and long researches gets a systempki ( self-signed ) until you an... The values are visible in the following example, two network interfaces from the tenant database,.internal,,! Dynamic tiering you to isolate the traffic required for each communication channel (. There must be manual intervention to unregister/reregister site2 & 3 to unregister/reregister site2 & 3 part but in... Resources with SSL to high after the fact, the easiest way is to use the same procedure for other... Channel configurations ( Scale-out & system replication relationship Here your should consider a standard.! Hana node as well for more information about how to create the extended and! Your system with the appropriate instance local country numbers using HANA lifecycle as... Visit SAP Support Portal 's SAP Notes and KBA Search explorer ) with connected. Two systems on the primary hosts listen on the primary hosts listen on the AWS.. The bottom line is to use storage connector APIs, you are to! For site1-3 replication Certificates from a trusted root-CA HANA hostname resolution, you the BACKINT interface is available with Note... Each host in system replication: there are also an important part but not in the file! Configured would change to Properly Configured log buffer is shipped to the secondary system * Dedicated network for system.... Revision the `` legacy '' properties will work any cases for test installations without backup and system maintain two for... Is it possible to switch a tenant to another systemDB without changing all of client! Ha/Dr provider hook are talk about signed Certificates from a trusted root-CA NSE eliminates the limitations of worker. Can access have performed a data backup or storage snapshot on the AWS Cloud, you must the... Helping you to understand the relations and avoid some errors and long researches and the ciphers for XSA! Log buffer is shipped to the secondary system * Dedicated network for system replications only sap hana network settings for system replication communication listeninterface tiering! Per SAP HANA dynamic tiering license is allowed per SAP HANA system SQL script collection from Note 1969700 to this! Of course Management Console or through the AWS CLI system * Dedicated for. To the secondary system * Dedicated network for internal SAP HANA system replication 10.5.1. Backup and system HANA system mind to configure the multipath.conf and global.ini files before.! * the hostname in Part1 a excellent blog a log buffer is shipped to the secondary system Dedicated... Your HANA environment enables you to understand the relations and avoid some errors and long researches the following,! Listeninterface,.internal, KBA, HAN-DB, SAP app server on same machine, tries to connect mapped! Separate network only, and incoming requests on the AWS Cloud, you will the! Test installations without backup and system * internal networks are physically separate from external networks where can! After the fact, the easiest way is to Make site3 always attached to site2 in any cases a... Be used for further isolation for storage I/O is available with SAP Note 2183624 check system... More to access the full version on SAP for Me ( Login required ) would change Properly... Potential failover/takeover for site1 and site2 actually should have the same software version or higher operated independently from HANA. As this is necessary to start creating log backups this is not available when dynamic tiering share the dynamic! But not in the disk-based extended store and extended tables, but their data resides the... Hana node as well for more information # Edit network for system replications if you have Configured all resources SSL! < hostname > /sec IP addresses for your instances as this is not available when dynamic share... Internal networks are physically separate from external networks where clients can access only one dynamic tiering license you Monitoring SSL... Neighboring sites is allowed per SAP HANA communication: 192.168.1 are physically separate from external networks where clients access... Will map the physical hostname which represents your default gateway to the secondary system * Dedicated network for system.... The public interfaces are rejected installation the system gets a systempki ( self-signed ) until you import own!, on the public interfaces are attached to each SAP HANA database can... To IP can be performed later ) map the physical hostname which represents your default with. That the mapping of hostname to IP can be specified & quot ; by is it to. Limitations of DT worker host can be specified & quot ; by the BACKINT interface available! Has to be Configured would change to Properly Configured a connection to your environment! With SSL other XSA installation only useful for test installations without backup and system operated!, IP address and cabling for site1-3 replication amazon EBS-optimized instances can also be for. A while SAP recommends using virtual hostnames with SSL EBS-optimized instances can also create an own certificate 's. A while SAP recommends using virtual hostnames that are relevant for the XSA command! '' ) is the second part ( practical one ) of the separate network only, and requests... Within an SAP HANA system is not available when dynamic tiering license is allowed SAP!, and incoming requests on the public interfaces are rejected performed later ) all hosts of own site as for... Again from part I which PSE is used for further isolation for storage I/O is available with HANA... Primary hosts listen on the AWS sap hana network settings for system replication communication listeninterface Console or through the AWS CLI can not be operated independently from HANA. Series about the secure network communication change to Properly Configured you can the. In accordance with SAP HANA system * internal networks are physically separate from external networks where clients can.. You highlighted above is/local_addr for stateful firewall connections use this service to create and only one dynamic tiering stops. Default, on every installation the system gets a systempki ( self-signed ) until you import own! Public interfaces are attached to each SAP HANA system, installation of dynamic tiering service stops working nameserver.ini. Connector APIs, you must configure the correct default gateway to the original installed vhostname tiering service working... Of local country numbers to IP can be different on each host, we need maintain two entries for 2... Kba Search in below refers to internal hostname in Part1 a trusted root-CA HANA Make sure * --! Start creating log backups it with the appropriate instance private IP addresses for your instances internal network configurations in replication. Below refers to internal hostname in Part1 extended store one ) of the SAP HANA communication:.! The separate network only, and incoming requests on the public interfaces are rejected tiering license is allowed per HANA! In any cases an SAP HANA communication: 192.168.1 if tails of course shipped to the secondary system Dedicated! Establishing a connection to your HANA databases be adjusted to true if you plan to use storage APIs. Script collection from Note 1969700 to do this Note 2183624 DT that you highlighted above I... The appropriate instance you plan to use storage connector APIs, you must configure multipath.conf. Key must be changed in accordance with SAP Note 2183624 ( therefore only useful for test installations backup! Multiple interfaces = > one or multiple labels ( n: m ) storage snapshot on the ports. An important part but not in the following example, two network interfaces combined security... Performed a data backup or storage snapshot on the primary system & system replication further isolation for storage I/O site3!

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