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#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2020-08-14 13:16:04 +0100 (Fri, 14 Aug 2020)
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#
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# https://github.com/harisekhon/bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/harisekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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# has to be before brace to set up logging path and logfile name
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mkdir -pv /vagrant/logs
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name="${0##*/}"
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log="/vagrant/logs/${name%.sh}.log"
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{
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bash_tools="/bash"
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# shellcheck source=provision-kube-common.sh
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. "/vagrant/provision-kube-common.sh"
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section "Running Vagrant Shell Provisioner Script - Kubernetes Master"
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kubeadm_join="/vagrant/kubeadm_join.sh"
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pushd /vagrant
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flannel_yml=kube-flannel.yml
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calico_yaml=calico.yaml
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weavenet_yaml=weavenet.yaml
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# XXX: one-line CNI deployment change right here :-)
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selected_cni="$calico_yaml"
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# should already be in the vagrant dir
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if [ "$selected_cni" = "$flannel_yml" ]; then
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if ! [ -s "$flannel_yml" ]; then
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timestamp "Fetching $flannel_yml:"
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wget -O "$flannel_yml" https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
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fi
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elif [ "$selected_cni" = "$calico_yaml" ]; then
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if ! [ -s "$calico_yaml" ]; then
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timestamp "Fetching $calico_yaml:"
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wget -O "$calico_yaml" https://docs.projectcalico.org/manifests/calico.yaml
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fi
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elif [ "$selected_cni" = "$weavenet_yaml" ]; then
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if ! [ -s "$weavenet_yaml" ]; then
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timestamp "Fetching $weavenet_yaml:"
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#wget -O "weave.sh https://git.io/weave
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wget -O "$weavenet_yaml" "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
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fi
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else
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echo "Selected CNI '$selected_cni' doesn't match one of: $flannel_yml, $calico_yaml, $weavenet_yaml"
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exit 1
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fi
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echo >&2
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if ! netstat -lnt | grep -q :10248; then
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timestamp "Bootstrapping kubernetes master:"
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echo >&2
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# remove stale old generated join script so worker(s) awaits new one
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rm -fv "$kubeadm_join"
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echo >&2
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# kubeadm-config.yml is in vagrant dir mounted at /vagrant
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kubeadm init --node-name "$(hostname -f)" --config=kubeadm-config.yaml --upload-certs | tee /vagrant/logs/kubeadm-init.out # save output for review
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echo >&2
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fi
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kubeadm token list
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echo >&2
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timestamp "Configuring kubectl:"
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mkdir -pv ~/.kube /home/vagrant/.kube /vagrant/.kube
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for kube_config in ~/.kube/config /home/vagrant/.kube/config; do
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if ! [ -f "$kube_config" ]; then
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cp -vf /etc/kubernetes/admin.conf "$kube_config"
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fi
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done
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chown -v "$(id -u):$(id -g)" ~/.kube/config
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chown -v vagrant:vagrant /home/vagrant/.kube/config
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cp -vf ~/.kube/config /vagrant/.kube/config
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echo >&2
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timestamp "Applying CNI $selected_cni:"
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kubectl apply -f "$selected_cni"
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echo >&2
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timestamp "Kubernetes Node Taints:"
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kubectl describe nodes | grep -i -e '^Name:' -e '^Taints:'
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echo >&2
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timestamp "untainting master node for pod scheduling"
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kubectl taint nodes --all node-role.kubernetes.io/master- || :
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echo >&2
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kubectl describe nodes | grep -i -e '^Name:' -e '^Taints:'
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echo >&2
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kubectl taint nodes --all node.kubernetes.io/not-ready- || :
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echo >&2
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timestamp "Kubernetes Nodes:"
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kubectl get nodes
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echo >&2
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timestamp "(re)generating $kubeadm_join for workers to use"
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"$bash_tools/kubeadm_join_cmd.sh" > "$kubeadm_join"
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chmod +x "$kubeadm_join"
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} 2>&1 | tee -a "$log"
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