Pools operating at a low capacity for F5

Vendor

F5

Description

Indeni will alert if the the number of members available in the pool is too low, based on the percentage of members available out of the total.

Remediation Steps

Log into the device and examine the status of the pool. Troubleshoot the application in case of failed monitors and verify that any disabled members is intentional.

Troubleshooting steps for HTTP monitors:

1. Log into the device through SSH.

2. Issue the following command: echo -ne "" | nc .

3. Make sure you get a response and that the response matches any receive string you have configured.

Example:

echo -ne "GET / HTTP/1.1\r\nHost:myapplication.domain.local\r\nUser-agent: Mozilla/5.0 (Windows NT 6.1\r\n\r\n" | nc 10.10.10.1 8080

Troubleshooting steps for HTTPS monitors:

1. Log into the device through SSH.

2. Issue the following command: curl -k https://:

3. Make sure you get a response and that the response matches any receive string you have configured.

Note: You might have to add additional header specified in the send string using --header.

Example:

curl -vvv --header "Host:myapplication.domain.local" --header "User-agent:Mozilla/5.0 (Windows NT 6.1" https://10.10.10.1:443/

Troubleshooting steps for TCP monitors with send strings:

1. Log into the device through SSH

2. Issue the following command: echo -ne "" | nc

3. Make sure you get a response and that the response matches any receive string you have configured.

Example:

echo -ne "info\r\nquit\r\n" | nc 10.10.10.1 8080

Troubleshooting steps for TCP monitors without send strings:

1. Log into the device through SSH

2. Issue the following command: telnet

Example

telnet 10.10.10.1 8080

How does this work?

This alert uses the iControl REST interface to extract the members available to process traffic compared to the total members of the pool.

Why is this important?

This alert uses the iControl REST interface to extract the members available to process traffic compared to the total members of the pool.

Without Indeni how would you find this?

An administrator could manually check member availabilty by logging on to the web interface of the device and clicking on "Local Traffic" -> "Pools" -> "Statistics". This would show the pool statistics for the active partition.


View Source Code