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util.sh
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/
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 and constant for the local config.
# Use the config file specified in $KUBE_CONFIG_FILE, or default to
# config-default.sh.
KUBE_PROMPT_FOR_UPDATE=y
KUBE_SKIP_UPDATE=${KUBE_SKIP_UPDATE-"n"}
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
source "${KUBE_ROOT}/cluster/gke/${KUBE_CONFIG_FILE:-config-default.sh}"
# Perform preparations required to run e2e tests
#
# Assumed vars:
# GCLOUD
function prepare-e2e() {
echo "... in prepare-e2e()" >&2
# Ensure GCLOUD is set to some gcloud binary.
if [[ -z "${GCLOUD:-}" ]]; then
echo "GCLOUD environment variable is not set. It should be your gcloud binary. " >&2
echo "A sane default is probably \$ export GCLOUD=gcloud" >&2
exit 1
fi
}
# Use the gcloud defaults to find the project. If it is already set in the
# environment then go with that.
#
# Assumed vars:
# GCLOUD
# Vars set:
# PROJECT
function detect-project() {
echo "... in detect-project()" >&2
if [[ -z "${PROJECT:-}" ]]; then
export PROJECT=$("${GCLOUD}" config list project | tail -n 1 | cut -f 3 -d ' ')
fi
if [[ -z "${PROJECT:-}" ]]; then
echo "Could not detect Google Cloud Platform project. Set the default project using " >&2
echo "'gcloud config set project <PROJECT>'" >&2
exit 1
fi
echo "Project: ${PROJECT}" >&2
}
# Execute prior to running tests to build a release if required for env.
function test-build-release() {
echo "... in test-build-release()" >&2
# We currently use the Kubernetes version that GKE supports (not testing
# bleeding-edge builds).
}
# Verify needed binaries exist.
function verify-prereqs() {
if ! which gcloud >/dev/null; then
local resp
if [[ "${KUBE_PROMPT_FOR_UPDATE}" == "y" ]]; then
echo "Can't find gcloud in PATH. Do you wish to install the Google Cloud SDK? [Y/n]"
read resp
else
resp="y"
fi
if [[ "${resp}" != "n" && "${resp}" != "N" ]]; then
curl https://sdk.cloud.google.com | bash
fi
if ! which gcloud >/dev/null; then
echo "Can't find gcloud in PATH, please fix and retry. The Google Cloud "
echo "SDK can be downloaded from https://cloud.google.com/sdk/."
exit 1
fi
fi
if [[ "${KUBE_SKIP_UPDATE}" == "y" ]]; then
return
fi
# update and install components as needed
if [[ "${KUBE_PROMPT_FOR_UPDATE}" != "y" ]]; then
gcloud_prompt="-q"
fi
local sudo_prefix=""
if [ ! -w $(dirname `which gcloud`) ]; then
sudo_prefix="sudo"
fi
${sudo_prefix} gcloud ${gcloud_prompt:-} components update preview || true
${sudo_prefix} gcloud ${gcloud_prompt:-} components update alpha|| true
${sudo_prefix} gcloud ${gcloud_prompt:-} components update || true
}
# Instantiate a kubernetes cluster
#
# Assumed vars:
# GCLOUD
# CLUSTER_NAME
# ZONE
# CLUSTER_API_VERSION (optional)
# NUM_MINIONS
function kube-up() {
echo "... in kube-up()" >&2
detect-project >&2
# Make the specified network if we need to.
if ! gcloud compute networks describe "${NETWORK}" &>/dev/null; then
echo "Creating new network: ${NETWORK}" >&2
gcloud compute networks create "${NETWORK}" --project="${PROJECT}" --range "${NETWORK_RANGE}"
else
echo "Using network: ${NETWORK}" >&2
fi
# Allow SSH on all nodes in the network. This doesn't actually check whether
# such a rule exists, only whether we've created this exact rule.
if ! gcloud compute firewall-rules describe "${FIREWALL_SSH}" &>/dev/null; then
echo "Creating new firewall for SSH: ${FIREWALL_SSH}" >&2
gcloud compute firewall-rules create "${FIREWALL_SSH}" \
--allow="tcp:22" \
--network="${NETWORK}" \
--project="${PROJECT}" \
--source-ranges="0.0.0.0/0"
else
echo "Using firewall-rule: ${FIREWALL_SSH}" >&2
fi
# Bring up the cluster.
"${GCLOUD}" alpha container clusters create "${CLUSTER_NAME}" \
--zone="${ZONE}" \
--project="${PROJECT}" \
--cluster-api-version="${CLUSTER_API_VERSION:-}" \
--num-nodes="${NUM_MINIONS}" \
--network="${NETWORK}"
}
# Execute prior to running tests to initialize required structure. This is
# called from hack/e2e-go only when running -up (it is run after kube-up, so
# the cluster already exists at this point).
#
# Assumed vars:
# CLUSTER_NAME
# GCLOUD
# Vars set:
# MINION_TAG
function test-setup() {
echo "... in test-setup()" >&2
# Detect the project into $PROJECT if it isn't set
detect-project >&2
# At this point, CLUSTER_NAME should have been used, so its value is final.
MINION_TAG="k8s-${CLUSTER_NAME}-node"
# Open up port 80 & 8080 so common containers on minions can be reached.
# TODO(mbforbes): Is adding ${USER} necessary, and sufficient, to avoid
# collisions here?
"${GCLOUD}" compute firewall-rules create \
"${MINION_TAG}-${USER}-http-alt" \
--allow tcp:80 tcp:8080 \
--project "${PROJECT}" \
--target-tags "${MINION_TAG}" \
--network="${NETWORK}"
}
# Ensure that we have a password created for validating to the master.
#
# Assumed vars:
# ZONE
# CLUSTER_NAME
# Vars set:
# KUBE_USER
# KUBE_PASSWORD
function get-password() {
echo "... in get-password()" >&2
detect-project >&2
KUBE_USER=$("${GCLOUD}" alpha container clusters describe \
--project="${PROJECT}" --zone="${ZONE}" "${CLUSTER_NAME}" \
| grep user | cut -f 4 -d ' ')
KUBE_PASSWORD=$("${GCLOUD}" alpha container clusters describe \
--project="${PROJECT}" --zone="${ZONE}" "${CLUSTER_NAME}" \
| grep password | cut -f 4 -d ' ')
}
# Detect the instance name and IP for the master
#
# Assumed vars:
# ZONE
# CLUSTER_NAME
# Vars set:
# KUBE_MASTER
# KUBE_MASTER_IP
function detect-master() {
echo "... in detect-master()" >&2
detect-project >&2
KUBE_MASTER="k8s-${CLUSTER_NAME}-master"
KUBE_MASTER_IP=$("${GCLOUD}" alpha container clusters describe \
--project="${PROJECT}" --zone="${ZONE}" "${CLUSTER_NAME}" \
| grep endpoint | cut -f 2 -d ' ')
}
# Assumed vars:
# NUM_MINIONS
# CLUSTER_NAME
# Vars set:
# (none)
function detect-minions() {
echo "... in detect-minions()" >&2
}
# Detect minions created in the minion group
#
# Assumed vars:
# none
# Vars set:
# MINION_NAMES
function detect-minion-names {
detect-project
export MINION_NAMES=""
count=$("${GCLOUD}" alpha container clusters describe --project="${PROJECT}" --zone="${ZONE}" "${CLUSTER_NAME}" | grep numNodes | cut -f 2 -d ' ')
for x in $(seq 1 $count); do
export MINION_NAMES="${MINION_NAMES} k8s-${CLUSTER_NAME}-node-${x} ";
done
MINION_NAMES=(${MINION_NAMES})
echo "MINION_NAMES=${MINION_NAMES[*]}"
}
# SSH to a node by name ($1) and run a command ($2).
#
# Assumed vars:
# GCLOUD
# ZONE
function ssh-to-node() {
echo "... in ssh-to-node()" >&2
detect-project >&2
local node="$1"
local cmd="$2"
# Loop until we can successfully ssh into the box
for try in $(seq 1 5); do
if gcloud compute ssh --ssh-flag="-o LogLevel=quiet" --project "${PROJECT}" --zone="${ZONE}" "${node}" --command "echo test > /dev/null"; then
break
fi
sleep 5
done
# Then actually try the command.
gcloud compute ssh --ssh-flag="-o LogLevel=quiet" --project "${PROJECT}" --zone="${ZONE}" "${node}" --command "${cmd}"
}
# Restart the kube-proxy on a node ($1)
function restart-kube-proxy() {
echo "... in restart-kube-proxy()" >&2
ssh-to-node "$1" "sudo /etc/init.d/kube-proxy restart"
}
# Restart the kube-proxy on master ($1)
function restart-apiserver() {
echo "... in restart-kube-apiserver()" >&2
ssh-to-node "$1" "sudo docker ps | grep /kube-apiserver | cut -d ' ' -f 1 | xargs sudo docker kill"
}
# Execute after running tests to perform any required clean-up. This is called
# from hack/e2e-test.sh. This calls kube-down, so the cluster still exists when
# this is called.
#
# Assumed vars:
# CLUSTER_NAME
# GCLOUD
# KUBE_ROOT
function test-teardown() {
echo "... in test-teardown()" >&2
detect-project >&2
# At this point, CLUSTER_NAME should have been used, so its value is final.
MINION_TAG="k8s-${CLUSTER_NAME}-node"
# First, remove anything we did with test-setup (currently, the firewall).
# NOTE: Keep in sync with name above in test-setup.
"${GCLOUD}" compute firewall-rules delete "${MINION_TAG}-${USER}-http-alt" \
--project="${PROJECT}" || true
# Then actually turn down the cluster.
"${KUBE_ROOT}/cluster/kube-down.sh"
}
# Actually take down the cluster. This is called from test-teardown.
#
# Assumed vars:
# GCLOUD
# ZONE
# CLUSTER_NAME
function kube-down() {
echo "... in kube-down()" >&2
detect-project >&2
"${GCLOUD}" alpha container clusters delete --project="${PROJECT}" \
--zone="${ZONE}" "${CLUSTER_NAME} --quiet"
}