Skip to main content
Sayed016
Sayed016
Gold ⭐️
June 22, 2022
Question

Frequent Entropy issue

Hello Team,

 

We are seeing a frequent entropy issue in our customer cluster as shown below.

 

Sayed016_0-1655926849549.png

 

/proc/sys/kernel/random/entropy_avail returns 3754. We also installed the rng-tools in all the nodes and the service rngd is also running. After checking the document https://docs.cloudera.com/cdp-private-cloud-base/7.1.6/installation/topics/cdpdc-data-at-rest-encryption-requirements.html#pnavId1 we can see the ExecStart looks as follows

 

ExecStart=/sbin/rngd -f -r /dev/urandom

 

 

However, our ExecStart is the default one and looks as follows

 

ExecStart=/sbin/rngd -f

 

 

can you please share if updating the ExecStart will solve the issue?

 

Best Regards

Sayed Anisul Hoque

 

 

2 replies

araujo
Platinum ⭐️⭐️⭐️
araujo
Platinum ⭐️⭐️⭐️
June 22, 2022

@Sayed016 ,

 

At the time of the alert, if you run a cat /proc/sys/kernel/random/entropy_avail on that exact host, what values are you getting?

 

Cheers,

André

 

Translate
-- Was your question answered? Please take some time to click on "Accept as Solution" below this post. If you find a reply useful, say thanks by clicking on the thumbs up button.
Sayed016
Sayed016Author
Gold ⭐️
June 23, 2022

Hello @araujo, by the time I logged in to the node to check the entropy_avail value it became good, this issue seems to resolve fast as from the Cloudera Alert mail I can see good status within the next minute after this issue occurred. Also, from the screenshot attached you can the value was 1.

 

Translate
Terms & ConditionsAccessibility statement