Make sure to disable SELinux or set SELinux to permissive mode for Oracle GI/RAC Linux servers.
It is recommended by Oracle to disable SELinux or set SELinux to permissive mode for Oracle GI/RAC. Otherwise you might get similar below errors:
Disk "ASM_DISK1" does not exist or is not instantiated Writing disk header: done Instantiating disk: oracleasm-instantiate-disk: Unable to open manager: No such file or directory failed Clearing disk header: done
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Great start to build your own RAC with detailed instructions and explanations. For building 18c/19c/20c GI/RAC, this post is still helpful. After completing this lab, you should be in better position as an Oracle RAC DBA.
This article describes the detailed step by step installation of Oracle Database 12c (12.1.0.2 64-bit) GI and RAC on Linux (Oracle Linux 7.1 64-bit) using VirtualBox (5.0.10). It applies to Oracle 18c and 19c GI and RAC as well.
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