Sachin PK's questions

I have an DC/OS(Mesos) slave which runs few docker containers with random ports exposed. The server has two interfaces eth0 and eth1. I want to block all incomming traffic through eth0 to docker containers using iptables. The exposed ports must be accessible from interface eth1. I cannot block specific ports since docker containers lauched by DC/OS(Mesos) on random ports.

I have tried iptables -I DOCKER-USER -i eth0 It blocked access to eth0 interface to exposed ports of docker container but I lost internet access inside container can't ping external network

Is there any way to block incomming access to docker exposed ports through eth0 interface?

We have 3 node Kafka cluster with replication factor 3 and default log retention period of 4 days. We have enabled the auto topic creation and It will create topics for each of our tasks. Once the task is finished we don't need the topic created for it. Now we have 2000 unused topics there in Kafka, can we perform bulk deletion of this 2000 topics without shutting down our cluster ?. Do bulk topic deletion affects our cluster's performance?. If yes what is the safe way to delete unwanted topics without shutting down cluster

I have a dse-cassandra cluster for use in production. I would like to attach an network-interface to every node. If I add the ip address of that interface on each cassandra config; would it break the cluster?

Hi I'm running a 5 node dse cassandra cluster. Every node is about 90 % disk usage ,so I've deleted data from my keyspace(I've only one keyspace).but my disk space is still 90 % .Is there anyway to regain disk space of deleted data ??

I have two interfaces in my CentOS-7 VPS. I want to allow all access to one interface(eth1, that is my private network). I'd change zone of eth1 to home how can i add a rule to allow everything on that interface ??