init commit

provision/rke2-agent.sh

@@ -0,0 +1,104 @@
+#!/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