SNMP is a very old protocol, dating back to 1988 and was elaborated later in 90s. When it comes to hardware monitoring, however, nearly every device supports at least SNMPv2. This makes it the “good enough” choice for basic monitoring of devices.

In this article, we create a Apache NiFi data flow, which will collect SNMP tables and convert them into Avro format.

Although there is SNMP processor in NiFi available, we will proceed with different approach, since the processor does not support querying SNMP tables. Steps in this article include:

• Preparing sandbox environment – simulator for SNMP server, setting up command line tools to grab SNMP tables (ifTable is used as an exapmle)
• Designing the NiFi DataFlow – step-by-step data flow design instructions to query SNMP server for a table, parse the CSV-like output into Apache Avro format (one record per CSV line).

Although there are some secure password hashing algorithms available, PBKDF2 is not yet implemented in Spring Security. Only BCryptPasswordEncoder, NoOpPasswordEncoder, StandardPasswordEncoder are available in versions 4.0.0.RC1 and 3.2.5.RELEASE.

In this article, we create and use our own PBKDF2 implementation of the PasswordEncoder.