From 6c044362d9dde4a0bb540fb9e4af6bc280036955 Mon Sep 17 00:00:00 2001
From: "Gupta, Sangeet (sg774j)" <sg774j@att.com>
Date: Mon, 18 Oct 2021 16:18:48 +0000
Subject: [PATCH] Add gate script to deploy kubernetes using kubeadm.

Change-Id: I164d0aa03f420cf263832e31c30807e9fccd8495
---
 tools/gate/deploy-k8s-kubeadm.sh | 228 +++++++++++++++++++++++++++++++
 zuul.d/jobs.yaml                 |  19 +++
 zuul.d/project.yaml              |   1 +
 3 files changed, 248 insertions(+)
 create mode 100755 tools/gate/deploy-k8s-kubeadm.sh

diff --git a/tools/gate/deploy-k8s-kubeadm.sh b/tools/gate/deploy-k8s-kubeadm.sh
new file mode 100755
index 000000000..507f0a9fc
--- /dev/null
+++ b/tools/gate/deploy-k8s-kubeadm.sh
@@ -0,0 +1,228 @@
+#!/bin/bash
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -ex
+
+: "${HELM_VERSION:="v3.6.3"}"
+: "${KUBE_VERSION:="1.21.5-00"}"
+: "${CALICO_VERSION:="v3.20"}"
+: "${YQ_VERSION:="v4.6.0"}"
+
+export DEBCONF_NONINTERACTIVE_SEEN=true
+export DEBIAN_FRONTEND=noninteractive
+
+sudo swapoff -a
+
+echo "DefaultLimitMEMLOCK=16384" | sudo tee -a /etc/systemd/system.conf
+sudo systemctl daemon-reexec
+
+function configure_resolvconf {
+  # here with systemd-resolved disabled, we'll have 2 separate resolv.conf
+  # 1 - /etc/resolv.conf - to be used for resolution on host
+
+  kube_dns_ip="10.96.0.10"
+  # keep all nameservers from both resolv.conf excluding local addresses
+  old_ns=$(grep -P --no-filename "^nameserver\s+(?!127\.0\.0\.|${kube_dns_ip})" \
+           /etc/resolv.conf /run/systemd/resolve/resolv.conf | sort | uniq)
+
+  # Add kube-dns ip to /etc/resolv.conf for local usage
+  sudo bash -c "echo 'nameserver ${kube_dns_ip}' > /etc/resolv.conf"
+  if [ -z "${HTTP_PROXY}" ]; then
+    sudo bash -c "printf 'nameserver 8.8.8.8\nnameserver 8.8.4.4\n' > /run/systemd/resolve/resolv.conf"
+    sudo bash -c "printf 'nameserver 8.8.8.8\nnameserver 8.8.4.4\n' >> /etc/resolv.conf"
+  else
+    sudo bash -c "echo \"${old_ns}\" > /run/systemd/resolve/resolv.conf"
+    sudo bash -c "echo \"${old_ns}\" >> /etc/resolv.conf"
+  fi
+
+  for file in /etc/resolv.conf /run/systemd/resolve/resolv.conf; do
+    sudo bash -c "echo 'search svc.cluster.local cluster.local' >> ${file}"
+    sudo bash -c "echo 'options ndots:5 timeout:1 attempts:1' >> ${file}"
+  done
+}
+
+# NOTE: Clean Up hosts file
+sudo sed -i '/^127.0.0.1/c\127.0.0.1 localhost localhost.localdomain localhost4localhost4.localdomain4' /etc/hosts
+sudo sed -i '/^::1/c\::1 localhost6 localhost6.localdomain6' /etc/hosts
+
+configure_resolvconf
+
+# shellcheck disable=SC1091
+. /etc/os-release
+
+# NOTE: Add docker repo
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+sudo apt-key fingerprint 0EBFCD88
+sudo add-apt-repository \
+  "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
+  $(lsb_release -cs) \
+  stable"
+
+# NOTE: Configure docker
+docker_resolv="/run/systemd/resolve/resolv.conf"
+docker_dns_list="$(awk '/^nameserver/ { printf "%s%s",sep,"\"" $NF "\""; sep=", "} END{print ""}' "${docker_resolv}")"
+
+sudo -E mkdir -p /etc/docker
+sudo -E tee /etc/docker/daemon.json <<EOF
+{
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "100m"
+  },
+  "storage-driver": "overlay2",
+  "live-restore": true,
+  "dns": [${docker_dns_list}]
+}
+EOF
+
+if [ -n "${HTTP_PROXY}" ]; then
+  sudo mkdir -p /etc/systemd/system/docker.service.d
+  cat <<EOF | sudo -E tee /etc/systemd/system/docker.service.d/http-proxy.conf
+[Service]
+Environment="HTTP_PROXY=${HTTP_PROXY}"
+Environment="HTTPS_PROXY=${HTTPS_PROXY}"
+Environment="NO_PROXY=${NO_PROXY}"
+EOF
+fi
+
+sudo -E apt-get update
+sudo -E apt-get install -y \
+  docker-ce \
+  docker-ce-cli \
+  containerd.io \
+  socat \
+  jq \
+  util-linux \
+  bridge-utils \
+  iptables \
+  conntrack \
+  libffi-dev \
+  ipvsadm \
+  make \
+  bc \
+  git-review \
+  notary
+
+# Prepare tmpfs for etcd when running on CI
+# CI VMs can have slow I/O causing issues for etcd
+# Only do this on CI (when user is zuul), so that local development can have a kubernetes
+# environment that will persist on reboot since etcd data will stay intact
+if [ "$USER" = "zuul" ]; then
+  sudo mkdir -p /var/lib/kubeadm/etcd
+  sudo mount -t tmpfs -o size=512m tmpfs /var/lib/kubeadm/etcd
+fi
+
+# Install YQ
+wget https://github.com/mikefarah/yq/releases/download/${YQ_VERSION}/yq_linux_amd64.tar.gz -O - | tar xz && sudo mv yq_linux_amd64 /usr/local/bin/yq
+
+# Install kubeadm kubectl and kublet
+
+echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
+sudo apt-get update
+sudo apt-get install -y kubelet=$KUBE_VERSION kubeadm=$KUBE_VERSION kubectl=$KUBE_VERSION
+sudo apt-mark hold kubelet kubeadm kubectl
+
+# Install Helm
+TMP_DIR=$(mktemp -d)
+sudo -E bash -c \
+  "curl -sSL https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz | tar -zxv --strip-components=1 -C ${TMP_DIR}"
+sudo -E mv "${TMP_DIR}"/helm /usr/local/bin/helm
+rm -rf "${TMP_DIR}"
+
+# NOTE: Deploy kubernetes using kubeadm. A CNI that supports network policy is
+# required for validation; use calico for simplicity.
+sudo kubeadm init --pod-network-cidr=192.168.0.0/16
+
+mkdir -p $HOME/.kube
+sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+sudo chown $(id -u):$(id -g) $HOME/.kube/config
+
+# Taing the node so that the pods can be deployed on master nodes.
+kubectl taint nodes --all node-role.kubernetes.io/master-
+
+curl https://docs.projectcalico.org/"${CALICO_VERSION}"/manifests/calico.yaml -o /tmp/calico.yaml
+
+sed -i -e 's#docker.io/calico/#quay.io/calico/#g' /tmp/calico.yaml
+
+# Download images needed for calico before applying manifests, so that `kubectl wait` timeout
+# for `k8s-app=kube-dns` isn't reached by slow download speeds
+awk '/image:/ { print $2 }' /tmp/calico.yaml | xargs -I{} sudo docker pull {}
+
+kubectl apply -f /tmp/calico.yaml
+
+# Note: Patch calico daemonset to enable Prometheus metrics and annotations
+tee /tmp/calico-node.yaml << EOF
+spec:
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9091"
+    spec:
+      containers:
+        - name: calico-node
+          env:
+            - name: FELIX_PROMETHEUSMETRICSENABLED
+              value: "true"
+            - name: FELIX_PROMETHEUSMETRICSPORT
+              value: "9091"
+            - name: FELIX_IGNORELOOSERPF
+              value: "true"
+EOF
+kubectl -n kube-system patch daemonset calico-node --patch "$(cat /tmp/calico-node.yaml)"
+
+kubectl get pod -A
+kubectl -n kube-system get pod -l k8s-app=kube-dns
+
+# NOTE: Wait for dns to be running.
+END=$(($(date +%s) + 240))
+until kubectl --namespace=kube-system \
+        get pods -l k8s-app=kube-dns --no-headers -o name | grep -q "^pod/coredns"; do
+  NOW=$(date +%s)
+  [ "${NOW}" -gt "${END}" ] && exit 1
+  echo "still waiting for dns"
+  sleep 10
+done
+kubectl -n kube-system wait --timeout=240s --for=condition=Ready pods -l k8s-app=kube-dns
+
+# Remove stable repo, if present, to improve build time
+helm repo remove stable || true
+
+# Add labels to the core namespaces & nodes
+kubectl label --overwrite namespace default name=default
+kubectl label --overwrite namespace kube-system name=kube-system
+kubectl label --overwrite namespace kube-public name=kube-public
+kubectl label nodes --all openstack-control-plane=enabled
+kubectl label nodes --all openstack-compute-node=enabled
+kubectl label nodes --all openvswitch=enabled
+kubectl label nodes --all linuxbridge=enabled
+kubectl label nodes --all ceph-mon=enabled
+kubectl label nodes --all ceph-osd=enabled
+kubectl label nodes --all ceph-mds=enabled
+kubectl label nodes --all ceph-rgw=enabled
+kubectl label nodes --all ceph-mgr=enabled
+
+for NAMESPACE in ceph openstack osh-infra; do
+tee /tmp/${NAMESPACE}-ns.yaml << EOF
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    kubernetes.io/metadata.name: ${NAMESPACE}
+    name: ${NAMESPACE}
+  name: ${NAMESPACE}
+EOF
+
+kubectl create -f /tmp/${NAMESPACE}-ns.yaml
+done
diff --git a/zuul.d/jobs.yaml b/zuul.d/jobs.yaml
index c1be464db..651697929 100644
--- a/zuul.d/jobs.yaml
+++ b/zuul.d/jobs.yaml
@@ -62,6 +62,25 @@
         - ./tools/deployment/common/000-install-packages.sh
         - ./tools/gate/deploy-k8s.sh
 
+- job:
+    name: openstack-helm-infra-deploy-kubeadm
+    parent: openstack-helm-infra-functional
+    timeout: 7200
+    roles:
+      - zuul: zuul/zuul-jobs
+    pre-run: playbooks/osh-infra-upgrade-host.yaml
+    post-run: playbooks/osh-infra-collect-logs.yaml
+    nodeset: openstack-helm-single-node
+    vars:
+      osh_params:
+        openstack_release: train
+        container_distro_name: ubuntu
+        container_distro_version: bionic
+      gate_scripts_relative_path: ../openstack-helm-infra
+      gate_scripts:
+        - ./tools/deployment/common/000-install-packages.sh
+        - ./tools/gate/deploy-k8s-kubeadm.sh
+
 - job:
     name: openstack-helm-infra-bandit
     run: playbooks/osh-infra-bandit.yaml
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index a50863a92..968df0478 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -70,4 +70,5 @@
         - openstack-helm-infra-metacontroller
         - openstack-helm-infra-aio-monitoring-tls
         - openstack-helm-infra-aio-logging-tls
+        - openstack-helm-infra-deploy-kubeadm
 ...