Failed to retrieve kernel parameter "net.ipv4.tcp_retries1"

[madhosoi]

I get this error in a very new deployment of concourse on K8S deployed with RKE, trying to execute a "Hello World" pipeline:

"level":"error",
"source":"guardian",
"message":"guardian.api.garden-server.create.failed",
"data":{"error":"failed to retrieve kernel parameter \"net.ipv4.tcp_retries1\": open /proc/sys/net/ipv4/tcp_retries1: no such file or directory"

To bring more information:

• I deployed it with LDAP authentication
• I deployed it with Vault secrets
• I can access to web UI, login, and interact with fly CLI

Could you help me to understand it? Thanks!

[madhosoi]

I just find the combination of factors to get this error:

• Docker + CentOS7 + Kernel 3.10 + Concourse

Sorry for the disruption if anyone is looking to help.

Solution: upgrade CentOS7 to kernel 5.4 and everything works. Thanks.