vagrant-lab-k8s/provision/rke2-agent.sh

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2022-03-13 12:29:53 +00:00
#!/bin/bash
set -euo pipefail
#
# Helper functions
#
declare -i term_width=80
h1() {
declare border padding text
border='\e[1;34m'"$(printf '=%.0s' $(seq 1 "$term_width"))"'\e[0m'
padding="$(printf ' %.0s' $(seq 1 $(((term_width - $(wc -m <<<"$*")) / 2))))"
text="\\e[1m$*\\e[0m"
echo -e "$border"
echo -e "${padding}${text}${padding}"
echo -e "$border"
}
h2() {
printf '\e[1;33m==>\e[37;1m %s\e[0m\n' "$*"
}
rke2_channel="$1"; shift
rke2_version="$1"; shift
rke2_server_url="$1"; shift
ip_address="$1"; shift
cat >/etc/motd <<'EOF'
_ ____ _
_ __| | _____|___ \ __ _ __ _ ___ _ __ | |_
| '__| |/ / _ \ __) | / _` |/ _` |/ _ \ '_ \| __|
| | | < __// __/ | (_| | (_| | __/ | | | |_
|_| |_|\_\___|_____(_)__,_|\__, |\___|_| |_|\__|
|___/
EOF
h1 "Install rke2 agent"
h2 "Version: ${rke2_version}"
h2 "Server: ${rke2_server_url}"
# install rke2 agent.
# see https://docs.rke2.io/install/install_options/install_options/
# see https://docs.rke2.io/install/install_options/linux_agent_config/
install -d -m 700 /etc/rancher/rke2
install /dev/null -m 600 /etc/rancher/rke2/config.yaml
cat >>/etc/rancher/rke2/config.yaml <<EOF
server: $rke2_server_url
token: $(cat /vagrant/tmp/node-token)
node-ip: $ip_address
EOF
curl -sfL https://raw.githubusercontent.com/rancher/rke2/$rke2_version/install.sh \
| \
INSTALL_RKE2_CHANNEL="$rke2_channel" \
INSTALL_RKE2_VERSION="$rke2_version" \
INSTALL_RKE2_TYPE="agent" \
sh -
h2 "Start rke2 agent service"
systemctl cat rke2-agent
systemctl enable rke2-agent.service
systemctl start rke2-agent.service
h2 "Configure system path for rke2"
# symlink the utilities and setup the environment variables to use them.
# NB kubectl should not be available in worker nodes as rke2 does not
# install a kubeconfig.
ln -fs /var/lib/rancher/rke2/bin/{kubectl,crictl,ctr} /usr/local/bin/
cat >/etc/profile.d/01-rke2.sh <<'EOF'
export CONTAINERD_ADDRESS=/run/k3s/containerd/containerd.sock
export CONTAINERD_NAMESPACE=k8s.io
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
EOF
source /etc/profile.d/01-rke2.sh
# NB do not try to use kubectl on a agent node, as kubectl does not work on a
# agent node without a proper kubectl configuration (which you could copy
# from the server, but we do not do it here).
# install the bash completion scripts.
h2 "Bash configure"
crictl completion bash >/usr/share/bash-completion/completions/crictl
kubectl completion bash >/usr/share/bash-completion/completions/kubectl
# list runnnig pods.
crictl pods
# list running containers.
crictl ps
ctr containers ls
# show listening ports.
ss -n --tcp --listening --processes
# show network routes.
ip route
# show memory info.
free
# show versions.
crictl version
ctr version