Sysadmin How to check if my server/docker support "reuseport" & "fastopen=256"?

guess you forgot about using ss command to check reuseport Nginx - [nginx-announce] nginx-1.9.1

from Re: SO_REUSEPORT to check if reuseport is working

look at *:80 instances

Code:

ss -nlt

so command to check if reuseport is working on port 80 and 443

Code (Text):

ss -lnt | egrep -e ':80 |:443 '

so on 8 cpu thread server, should have 8x port 80 and 8x port 443 listing

Code (Text):

ss -lnt | egrep -e ':80 |:443 '
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:443                      *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*               
LISTEN     0      2048         *:80                       *:*

for fastopen see Beta Branch - enable TCP Fast Open support if system supports it and specifically

 

FYI, Docker uses host system Kernel so like OpenVZ, so whatever host system Kernel supports is usually same for Docker image containers and since Docker is only recommended for CentOS on CentOS 7, then CentOS 7 default 3.10 kernels have fastopen and reuseport support most of the time.

 

CentOS 7 KVM = 3.10+ kernels

 

well then 4.15 kernel so most likely reuseport is used. It was when I did testing at Nginx - Nginx HTTP/2 HTTPS Benchmarks - Centmin Mod vs Easyengine vs Webinoly vs VestaCP vs OneInStack