PRNDA

# on a fresh Ubuntu 16.04 host
sudo apt-get update

# copy the packages from https://launchpad.net/debian/+source/openssh/1:7.4p1-10+deb9u3

wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/openssh/1:7.4p1-10/openssh_7.4p1-10.dsc
wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/openssh/1:7.4p1-10/openssh_7.4p1.orig.tar.gz
wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/openssh/1:7.4p1-10/openssh_7.4p1-10.debian.tar.xz

tar -zxvf openssh_7.4p1.orig.tar.gz

PRNDA

Installing microk8s in an LXC container

I wanted to run Microk8s on a Proxmox 6 host inside of an LXC container. These are my notes from the journey.

1. Create a privileged LXC container through the Proxmox web interface

• Enable nesting and FUSE
  • In Proxmox UI, select container, then Options > Features > Check nesting and FUSE boxes

2. SSH into the Proxmox host and edit the container's config in /etc/pve/lxc/.conf
   • Add the following lines

• lxc.apparmor.profile: unconfined

PRNDA

Wireguard and iptables restrictions for multiple users

If you don't know what Wireguard is, well, you should. It's fast, easy to setup and highly configurable. We will configure Wireguard for multiple users with various restrictions using iptables.

Assumptions

This should fit most setups (not mine though 😉)

PRNDA

Producer

Setup
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3

Single thread, no replication

bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196