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Designing the Identification Section

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In this lesson, you will learn:

  • What the identification section must do
  • How to find the app reliably
  • The archiver’s section

🔁 Quick look back: Last time: Deciding Between an Extension and a Custom Pattern. You learned when to extend a pattern and when to build a new one.

1 The Problem: The Pattern Must Recognise the Archiver Reliably

The archiver runs on snwr-mail-02. The pattern must recognise it every night. But:

  • Its process name changed once already.
  • Other processes have similar names.

🎯 The problem: The pattern must recognise the archiver reliably, even after small changes.

👉 The fix: Design the identification section around stable facts: process, path and port.

Flow of the archiver identification steps.
Figure 1. The archiver’s identification section.

2 Design rules

  • Match on more than one fact, such as process and path.
  • Allow for small name changes.
  • Fill the fields your identification rule needs, like install path.

💡 Good to know: Your identification rule and this section must agree. If the rule matches on install path, the section must fill it.

3 The archiver’s section

  1. Find the process whose name starts with snwr-archiver.
  2. Check it runs from /opt/snwr-archiver.
  3. Check port 8465 is listening.
  4. Fill the name and install path.

4 Project Clear View: How We Implemented It

📍 Situation: The archiver’s process name had already changed once.

🧭 Decision: Identify it by process, path and port together.

🛠️ Steps we took:

  1. Created the application pattern on snwrdev.
  2. Added the identification section with three checks.
  3. Filled name and install path for the identification rule.
  4. Tested against the lab copy on snwrdev.

✅ What we verified:

  • The archiver is recognised under both process names.
  • Other processes don’t match.

📁 Evidence: The identification section, part of the archiver pattern.

5 Quick recap

  • Identify apps by several stable facts.
  • Allow for small name changes.
  • Fill the fields your identification rule uses.
  • Test that other processes don’t match.

6 Check yourself

Think of your answer first. Then tap to check.

1 Why match on process, path and port? Show answer

Several facts are more reliable than one, especially if the name changes.

2 Which path does the archiver run from? Show answer

/opt/snwr-archiver.

3 Why fill the install path? Show answer

The identification rule matches on it.

Nice work! The pattern can recognise the archiver. 🎉
Next up: Collecting and Parsing Data

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