How can I increase entropy in a Rhel 9.2 virtual machine running on Azure?
Java applications like Solr are failing because of low entropy.
Started Apache Solr 9. Java 17 detected. Enabled workaround for SOLR-16463 Warning: Available entropy is low. As a result, use of the UUIDField, SSL, or any other features that require RNG might not work properly. To check for the amount of available entropy, use 'cat /proc/sys/kernel/random/entropy_avail'.
I have tried installing rng-tools and haveged but the problem still persists. The output of cat /proc/sys/kernel/random/entropy_avail remains 256.
Below is the status of haveged service:
Started Entropy Daemon based on the HAVEGE algorithm. haveged[14569]: haveged: command socket is listening at fd 3 haveged[14569]: haveged: fills: 1, generated: 512 K bytes, RNDADDENTROPY: 256
and the status of rngd service:
Started Hardware RNG Entropy Gatherer Daemon. rngd[14506]: Disabling 7: PKCS11 Entropy generator (pkcs11) rngd[14506]: Disabling 5: NIST Network Entropy Beacon (nist) rngd[14506]: Disabling 9: Qrypt quantum entropy beacon (qrypt) rngd[14506]: Initializing available sources rngd[14506]: [hwrng ]: Initialization Failed rngd[14506]: [rdrand]: Enabling RDSEED rng support rngd[14506]: [rdrand]: Initialized rngd[14506]: [jitter]: JITTER timeout set to 5 sec rngd[14506]: [jitter]: Initializing AES buffer
How can I increase entropy?
Responses