#!/bin/bash

# Copyright 2017 The Openstack-Helm Authors.
#
#    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 -xe
: ${HELM_VERSION:="v2.11.0"}
: ${KUBE_VERSION:="v1.12.2"}
: ${MINIKUBE_VERSION:="v0.30.0"}
: ${CALICO_VERSION:="v3.3"}
export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true

# NOTE: Clean Up hosts file
sudo sed -i '/^127.0.0.1/c\127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4' /etc/hosts
sudo sed -i '/^::1/c\::1 localhost6 localhost6.localdomain6' /etc/hosts

# NOTE: Install required packages on host
sudo apt-key adv --keyserver keyserver.ubuntu.com  --recv 460F3994
RELEASE_NAME=$(grep 'CODENAME' /etc/lsb-release | awk -F= '{print $2}')
sudo add-apt-repository "deb https://download.ceph.com/debian-luminous/ ${RELEASE_NAME} main"
sudo -E apt-get update
sudo -E apt-get install -y \
    docker.io \
    socat \
    jq \
    util-linux \
    ceph-common \
    rbd-nbd \
    nfs-common \
    bridge-utils \
    libxtables11
sudo -E tee /etc/modprobe.d/rbd.conf <<EOF
install rbd /bin/true
EOF

sudo -E curl -sSLo /usr/local/bin/minikube https://storage.googleapis.com/minikube/releases/${MINIKUBE_VERSION}/minikube-linux-amd64
sudo -E chmod +x /usr/local/bin/minikube

sudo -E curl -sSLo /usr/local/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/bin/linux/amd64/kubectl
sudo -E chmod +x /usr/local/bin/kubectl

TMP_DIR=$(mktemp -d)
sudo -E bash -c "curl -sSL https://storage.googleapis.com/kubernetes-helm/helm-${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 kubenetes using minikube. A CNI that supports network policy is
# required for validation, lets just use calico for simplicity
sudo -E minikube config set kubernetes-version ${KUBE_VERSION}
sudo -E minikube config set vm-driver none
sudo -E minikube addons disable addon-manager
sudo -E minikube addons disable dashboard
export CHANGE_MINIKUBE_NONE_USER=true
sudo -E minikube start \
  --extra-config=kubelet.network-plugin=cni \
  --extra-config=controller-manager.allocate-node-cidrs=true \
  --extra-config=controller-manager.cluster-cidr=192.168.0.0/16
kubectl apply -f https://docs.projectcalico.org/${CALICO_VERSION}/getting-started/kubernetes/installation/hosted/rbac-kdd.yaml
kubectl apply -f https://docs.projectcalico.org/${CALICO_VERSION}/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yaml

# NOTE: Wait for node to be ready.
kubectl wait --timeout=240s --for=condition=Ready nodes/minikube

# 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"
done
kubectl --namespace=kube-system wait --timeout=240s --for=condition=Ready pods -l k8s-app=kube-dns

# NOTE: Deploy helm/tiller into the cluster
kubectl create -n kube-system serviceaccount helm-tiller
cat <<EOF | kubectl apply -f -
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: helm-tiller
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
  - kind: ServiceAccount
    name: helm-tiller
    namespace: kube-system
EOF

helm init --service-account helm-tiller

kubectl --namespace=kube-system wait \
  --timeout=240s \
  --for=condition=Ready \
  pod -l app=helm,name=tiller


# NOTE: Set up local helm server
sudo -E tee /etc/systemd/system/helm-serve.service <<EOF
[Unit]
Description=Helm Server
After=network.target

[Service]
User=$(id -un 2>&1)
Restart=always
ExecStart=/usr/local/bin/helm serve

[Install]
WantedBy=multi-user.target
EOF

sudo chmod 0640 /etc/systemd/system/helm-serve.service
sudo systemctl restart helm-serve
sudo systemctl daemon-reload
sudo systemctl enable helm-serve


# NOTE: Set up local helm repo
helm repo add local http://localhost:8879/charts
helm repo update
uptime
make


# NOTE: Set required labels on host(s)
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


# NOTE: Setup resolv.conf to use the k8s api server, which is required for the
# kubelet to resolve cluster services.
sudo -E rm -rf /etc/resolv.conf
sudo -E tee /etc/resolv.conf <<EOF
search svc.cluster.local cluster.local
nameserver 10.96.0.10
nameserver 8.8.8.8
nameserver 8.8.4.4
options ndots:5 timeout:1 attempts:1
EOF