Oats87

export KUBECONFIG=/etc/rancher/rke2/rke2.yaml; export PATH=$PATH:/var/lib/rancher/rke2/bin

Oats87

#!/bin/bash

REPO=${REPO:-rancher}
IMAGE=${IMAGE:-rancher-agent}
TAG=${TAG:-v2.5.1-rc1}

DESTREPO=${DESTREPO:-oats87}
DESTIMAGE=${DESTIMAGE:-$IMAGE}
DESTTAG=${DESTTAG:-$TAG}

Oats87

#!/bin/sh
sed -i "/\b\UUID\b/d" /etc/sysconfig/network-scripts/ifcfg-ens192
rm -vf /etc/ssh/ssh_host_*
systemctl stop systemd-journald.socket
find /var/log -type f -exec rm {} \;
rm -rf /var/log/journal/*
rm /root/.bash_history; history -c
systemctl poweroff

Oats87

kubectl get configmap -n kube-system cattle-controllers -o json | jq -r '.metadata.annotations["control-plane.alpha.kubernetes.io/leader"]' | jq -r ".holderIdentity"

Oats87

for i in $(kubectl get state -n hobbyfarm | awk '{print $1}' | grep -v "NAME"); do kubectl -n hobbyfarm patch state $i -p '{"metadata":{"finalizers": []}}' --type=merge; done

Oats87

etcdctl get / --prefix --endpoints=${ETCDCTL_ENDPOINTS} --keys-only | grep ${NAMESPACE}

Oats87

mkdir /etc/docker
cat << EOF > /etc/docker/daemon.json
{
"log-driver": "json-file",
"log-opts": {
    "max-size": "10m",    
    "max-file": "6"    
    }
}
EOF

Oats87

cat << EOF >> /etc/sysctl.conf
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.core.somaxconn = 32768
EOF

Oats87

fdisk /dev/sdb

mkdir /var/lib/docker
echo $(blkid /dev/sdb1 | awk '{print $2}' | sed -e 's/"//g') /var/lib/docker ext4 defaults 0 0 >> /etc/fstab
sed -i 's/\/dev\/mapper\/centos-swap/#\/dev\/mapper\/centos-swap/g' /etc/fstab

mount -a

reboot

Oats87

# Docker 17.03.2 on RHEL/CentOS 7

Rancher has discovered a few issues when running Upstream Docker 17.03.2 on RHEL/CentOS 7. This document is being written to document recommendations for Docker configuration in order to ensure reliability while operating Kubernetes and Rancher with RHEL/CentOS 7.

### Overlay2 Storage Driver

Currently, Upstream Docker 17.03.2 performs kernel version validations to enable overlay2. As official overlay2 support from the upstream Linux kernel was not enabled until version 4.0 or higher than the kernel. Red Hat backported overlay2 support to 3.10.0-514 of their kernel.

Overlay2 support can be enabled by setting the following contents in the `/etc/docker/daemon.json` file and restarting Docker. Please note that you must do this on a fresh docker installation, or remove all running containers before performing this action.
```{