I am trying to build a docker container which should have the /proc/sys/net/ipv4/tcp_* options.while building i am trying to tune the file /proc/sys/net/ipv4/tcp_rmem.
when i build the docker container it is throwing an error like
sysctl: cannot stat /proc/sys/net/ipv4/tcp_rmem: No such file or directory
sysctl: cannot stat /proc/sys/net/core/rmem_max: No such file or directory
sysctl: cannot stat /proc/sys/net/core/wmem_max: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/udp_mem: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/udp_rmem_min: No such file or directory
sysctl: cannot stat /proc/sys/net/ipv4/udp_wmem_min: No such file or directory
Could anyone please help me in resolving this issue?
Maybe it’s too late for an answer, but perhaps this could help others who bump into similar issue with kernel /proc settings.
I guess a container has a virtual link to the /proc path of the host it’s running on. It’s automatically mounted into the container.
In my case, an app warns that /proc/sys/net/core/rmem_max and /proc/sys/net/core/wmem_max must have values greater than the default. I edit /etc/sysctl.conf on the host it’s running on to add the following:
# Allow a 25MB UDP receive buffer for JGroups
net.core.rmem_max = 26214400
# Allow a 1MB UDP send buffer for JGroups
net.core.wmem_max = 1048576
I run sysctl -p, then I deploy the app. The app stops giving me the warnings.