Linux Discovery FAQs 

All the discovery related concepts are explained in details. It is useful to read them before the FAQs

1. What privileges user need for discovery?

• Ans:
  • Please refer link for the list of privileges. Unless and until the priviledges are satisfied, the discovery will not start.

2. Can I bulk import my Datacenter systems details?

• Ans:
  • Yes. You can use chcli to provision the bulk hosts.
  • Alternately you can import the hosts described in the csv format.

3. Can I use username and password for SSH authentication instead of SSH key?

• Ans:
  • Yes. You can use ssh keys or username/password to connect to host.

4. How can my servers in the datacenter be accessed from the CH SAAS portal?

• Ans:
  • CH SaaS portal connects to hosts over network(ssh). One need to open up the external firewall and allow the port forwarding for CH Saas portal to reach to the hosts on internal network.

5. What tools does OmniDeq install on my system? Are they cleaned up?

• Ans:
  • OmniDeq installs a proprietry discovery tool on the host to be discovered. The binaries are not removed after the discovery as the same set of binaries are required during the transform phase.

6. How to check the chtool version?

• Ans:
  1. SSH to Discover machine.
  2. Run the command to check chtool version /opt/.ch-tools/go/chtool -v

7. What happens when the x-ray starts?

• Ans:
  • When x-ray starts, the x-ray probe captures the interaction of application with the underlying operating system.

8. How much time does it takes to complete x-ray attach/detach?

• Ans:
  • The x-ray attach time and detach time may vary and depends on the type of application.
  • It also depends on the CPU affinity and memory capacity of discover node.

9. Does x-ray works for 32-bit applications?

• Ans:
  • No. Current OmniDeq scope supports 64-bit applications.

10. Does x-ray works on 32-bit platforms?

• Ans:
  • No. Current OmniDeq scope supports 64-bit Platforms.

11. Does x-ray works for database applications?

• Ans:
  • OmniDeq does not focus of databse migration, as there are variety of tools available which specialise in database migration.

12. Can combined init scripts for two or many applications works while discovery in ch-appliance? How processes will be detected in this case?

• Ans:
  • If a init script start two processes in detached mode they will detected as separate processes. These processes will treated individually by the x-ray probe. If there is parent process running started through init script which in turn have started two different processes then the x-ray probe will be attached to parent process. If ch-appliance cannot detect the relations between the process and the init.d service, then it treats the process as standalone process.

13. How do I get the log?

• Ans:
  1. SSH to Discover machine.
  2. Go to directory /opt/.ch-tools/logs/

14. How to find the common logs?

• Ans:
  1. SSH to Discover machine.
  2. Go to directory /opt/.ch-tools/logs/
  3. Seach the logs in file named cat chtool.out | grep -i common

16. How to check the probe logs?

• Ans:
  1. SSH to Discover machine.
  2. Go to directory /opt/.ch-tools/logs/
  3. Seach the logs in file named cat chtool.out | grep -i probe