k3s/cluster/vagrant/util.sh

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#!/bin/bash
# Copyright 2014 Google Inc. All rights reserved.
#
# 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.
# A library of helper functions that each provider hosting Kubernetes must implement to use cluster/kube-*.sh scripts.
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
source "${KUBE_ROOT}/cluster/vagrant/${KUBE_CONFIG_FILE-"config-default.sh"}"
function detect-master () {
KUBE_MASTER_IP=$MASTER_IP
echo "KUBE_MASTER_IP: ${KUBE_MASTER_IP}" 1>&2
}
# Get minion IP addresses and store in KUBE_MINION_IP_ADDRESSES[]
function detect-minions {
echo "Minions already detected" 1>&2
KUBE_MINION_IP_ADDRESSES=("${MINION_IPS[@]}")
}
# Verify prereqs on host machine Also sets exports USING_KUBE_SCRIPTS=true so
# that our Vagrantfile doesn't error out.
function verify-prereqs {
for x in vagrant VBoxManage; do
if ! which "$x" >/dev/null; then
echo "Can't find $x in PATH, please fix and retry."
exit 1
fi
done
# Set VAGRANT_CWD to KUBE_ROOT so that we find the right Vagrantfile no
# matter what directory the tools are called from.
export VAGRANT_CWD="${KUBE_ROOT}"
export USING_KUBE_SCRIPTS=true
}
# Create a temp dir that'll be deleted at the end of this bash session.
#
# Vars set:
# KUBE_TEMP
function ensure-temp-dir {
if [[ -z ${KUBE_TEMP-} ]]; then
export KUBE_TEMP=$(mktemp -d -t kubernetes.XXXXXX)
trap 'rm -rf "${KUBE_TEMP}"' EXIT
fi
}
# Create a set of provision scripts for the master and each of the minions
function create-provision-scripts {
ensure-temp-dir
(
echo "#! /bin/bash"
echo "KUBE_ROOT=/vagrant"
echo "INSTANCE_PREFIX='${INSTANCE_PREFIX}'"
echo "MASTER_NAME='${INSTANCE_PREFIX}-master'"
echo "MASTER_IP='${MASTER_IP}'"
echo "MINION_NAMES=(${MINION_NAMES[@]})"
echo "MINION_IPS=(${MINION_IPS[@]})"
echo "NODE_IP='${MASTER_IP}'"
echo "CONTAINER_SUBNET='${CONTAINER_SUBNET}'"
echo "CONTAINER_NETMASK='${MASTER_CONTAINER_NETMASK}'"
echo "MASTER_CONTAINER_SUBNET='${MASTER_CONTAINER_SUBNET}'"
echo "CONTAINER_ADDR='${MASTER_CONTAINER_ADDR}'"
echo "MINION_CONTAINER_NETMASKS='${MINION_CONTAINER_NETMASKS[@]}'"
echo "MINION_CONTAINER_SUBNETS=(${MINION_CONTAINER_SUBNETS[@]})"
echo "PORTAL_NET='${PORTAL_NET}'"
echo "MASTER_USER='${MASTER_USER}'"
echo "MASTER_PASSWD='${MASTER_PASSWD}'"
echo "ENABLE_NODE_MONITORING='${ENABLE_NODE_MONITORING:-false}'"
echo "ENABLE_NODE_LOGGING='${ENABLE_NODE_LOGGING:-false}'"
echo "LOGGING_DESTINATION='${LOGGING_DESTINATION:-}'"
echo "ENABLE_CLUSTER_DNS='${ENABLE_CLUSTER_DNS:-false}'"
echo "DNS_SERVER_IP='${DNS_SERVER_IP:-}'"
echo "DNS_DOMAIN='${DNS_DOMAIN:-}'"
echo "DNS_REPLICAS='${DNS_REPLICAS:-}'"
echo "RUNTIME_CONFIG='${RUNTIME_CONFIG:-}'"
echo "ADMISSION_CONTROL='${ADMISSION_CONTROL:-}'"
grep -v "^#" "${KUBE_ROOT}/cluster/vagrant/provision-master.sh"
grep -v "^#" "${KUBE_ROOT}/cluster/vagrant/provision-network.sh"
) > "${KUBE_TEMP}/master-start.sh"
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
(
echo "#! /bin/bash"
echo "MASTER_NAME='${MASTER_NAME}'"
echo "MASTER_IP='${MASTER_IP}'"
echo "MINION_NAMES=(${MINION_NAMES[@]})"
echo "MINION_IPS=(${MINION_IPS[@]})"
echo "MINION_IP='${MINION_IPS[$i]}'"
echo "MINION_ID='$i'"
echo "NODE_IP='${MINION_IPS[$i]}'"
echo "MASTER_CONTAINER_SUBNET='${MASTER_CONTAINER_SUBNET}'"
echo "CONTAINER_ADDR='${MINION_CONTAINER_ADDRS[$i]}'"
echo "CONTAINER_NETMASK='${MINION_CONTAINER_NETMASKS[$i]}'"
echo "MINION_CONTAINER_SUBNETS=(${MINION_CONTAINER_SUBNETS[@]})"
echo "CONTAINER_SUBNET='${CONTAINER_SUBNET}'"
echo "DOCKER_OPTS='${EXTRA_DOCKER_OPTS-}'"
grep -v "^#" "${KUBE_ROOT}/cluster/vagrant/provision-minion.sh"
grep -v "^#" "${KUBE_ROOT}/cluster/vagrant/provision-network.sh"
) > "${KUBE_TEMP}/minion-start-${i}.sh"
done
}
function verify-cluster {
echo "Each machine instance has been created/updated."
echo " Now waiting for the Salt provisioning process to complete on each machine."
echo " This can take some time based on your network, disk, and cpu speed."
echo " It is possible for an error to occur during Salt provision of cluster and this could loop forever."
# verify master has all required daemons
echo "Validating master"
local machine="master"
local -a required_daemon=("salt-master" "salt-minion" "kube-apiserver" "nginx" "kube-controller-manager" "kube-scheduler" "kubelet")
local validated="1"
until [[ "$validated" == "0" ]]; do
validated="0"
local daemon
for daemon in "${required_daemon[@]}"; do
vagrant ssh "$machine" -c "which '${daemon}'" >/dev/null 2>&1 || {
printf "."
validated="1"
sleep 2
}
done
done
# verify each minion has all required daemons
local i
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
echo "Validating ${VAGRANT_MINION_NAMES[$i]}"
local machine=${VAGRANT_MINION_NAMES[$i]}
local -a required_daemon=("salt-minion" "kubelet" "docker")
local validated="1"
until [[ "$validated" == "0" ]]; do
validated="0"
local daemon
for daemon in "${required_daemon[@]}"; do
vagrant ssh "$machine" -c "which $daemon" >/dev/null 2>&1 || {
printf "."
validated="1"
sleep 2
}
done
done
done
echo
echo "Waiting for each minion to be registered with cloud provider"
for (( i=0; i<${#MINION_IPS[@]}; i++)); do
local machine="${MINION_IPS[$i]}"
local count="0"
until [[ "$count" == "1" ]]; do
local minions
minions=$("${KUBE_ROOT}/cluster/kubectl.sh" get nodes -o template -t '{{range.items}}{{.metadata.name}}:{{end}}' --api-version=v1beta3)
count=$(echo $minions | grep -c "${MINION_IPS[i]}") || {
printf "."
sleep 2
count="0"
}
done
done
# By this time, all kube api calls should work, so no need to loop and retry.
echo "Validating we can run kubectl commands."
vagrant ssh master --command "kubectl get pods" || {
echo "WARNING: kubectl to localhost failed. This could mean localhost is not bound to an IP"
}
(
echo
echo "Kubernetes cluster is running. The master is running at:"
echo
echo " https://${MASTER_IP}"
echo
echo "The user name and password to use is located in ~/.kubernetes_vagrant_auth."
echo
)
}
# Instantiate a kubernetes cluster
function kube-up {
get-password
create-provision-scripts
vagrant up
local kube_cert=".kubecfg.vagrant.crt"
local kube_key=".kubecfg.vagrant.key"
local ca_cert=".kubernetes.vagrant.ca.crt"
(umask 077
vagrant ssh master -- sudo cat /srv/kubernetes/kubecfg.crt >"${HOME}/${kube_cert}" 2>/dev/null
vagrant ssh master -- sudo cat /srv/kubernetes/kubecfg.key >"${HOME}/${kube_key}" 2>/dev/null
vagrant ssh master -- sudo cat /srv/kubernetes/ca.crt >"${HOME}/${ca_cert}" 2>/dev/null
cat <<EOF >"${HOME}/.kubernetes_vagrant_auth"
{
"User": "$KUBE_USER",
"Password": "$KUBE_PASSWORD",
"CAFile": "$HOME/$ca_cert",
"CertFile": "$HOME/$kube_cert",
"KeyFile": "$HOME/$kube_key"
}
EOF
cat <<EOF >"${HOME}/.kubernetes_vagrant_kubeconfig"
apiVersion: v1
clusters:
- cluster:
certificate-authority: ${HOME}/$ca_cert
server: https://${MASTER_IP}:443
name: vagrant
contexts:
- context:
cluster: vagrant
namespace: default
user: vagrant
name: vagrant
current-context: "vagrant"
kind: Config
preferences: {}
users:
- name: vagrant
user:
auth-path: ${HOME}/.kubernetes_vagrant_auth
EOF
chmod 0600 ~/.kubernetes_vagrant_auth "${HOME}/${kube_cert}" \
"${HOME}/${kube_key}" "${HOME}/${ca_cert}"
)
verify-cluster
}
# Delete a kubernetes cluster
function kube-down {
vagrant destroy -f
}
# Update a kubernetes cluster with latest source
function kube-push {
get-password
create-provision-scripts
vagrant provision
}
# Execute prior to running tests to build a release if required for env
function test-build-release {
# Make a release
"${KUBE_ROOT}/build/release.sh"
}
# Execute prior to running tests to initialize required structure
function test-setup {
echo "Vagrant test setup complete" 1>&2
}
# Execute after running tests to perform any required clean-up
function test-teardown {
echo "Vagrant ignores tear-down" 1>&2
}
# Set the {user} and {password} environment values required to interact with provider
function get-password {
export KUBE_USER=vagrant
export KUBE_PASSWORD=vagrant
echo "Using credentials: $KUBE_USER:$KUBE_PASSWORD" 1>&2
}
# Find the minion name based on the IP address
function find-vagrant-name-by-ip {
local ip="$1"
local ip_pattern="${MINION_IP_BASE}(.*)"
# This is subtle. We map 10.245.2.2 -> minion-1. We do this by matching a
# regexp and using the capture to construct the name.
[[ $ip =~ $ip_pattern ]] || {
return 1
}
echo "minion-$((${BASH_REMATCH[1]} - 1))"
}
# Find the vagrant machine name based on the host name of the minion
function find-vagrant-name-by-minion-name {
local ip="$1"
if [[ "$ip" == "${INSTANCE_PREFIX}-master" ]]; then
echo "master"
return $?
fi
local ip_pattern="${INSTANCE_PREFIX}-minion-(.*)"
[[ $ip =~ $ip_pattern ]] || {
return 1
}
echo "minion-${BASH_REMATCH[1]}"
}
# SSH to a node by name or IP ($1) and run a command ($2).
function ssh-to-node {
local node="$1"
local cmd="$2"
local machine
machine=$(find-vagrant-name-by-ip $node) || true
[[ -n ${machine-} ]] || machine=$(find-vagrant-name-by-minion-name $node) || true
[[ -n ${machine-} ]] || {
echo "Cannot find machine to ssh to: $1"
return 1
}
vagrant ssh "${machine}" -c "${cmd}"
}
# Restart the kube-proxy on a node ($1)
function restart-kube-proxy {
ssh-to-node "$1" "sudo systemctl restart kube-proxy"
}
# Restart the apiserver
function restart-apiserver {
ssh-to-node "$1" "sudo systemctl restart kube-apiserver"
}
# Perform preparations required to run e2e tests
function prepare-e2e() {
echo "Vagrant doesn't need special preparations for e2e tests" 1>&2
}