#!/bin/bash

# Copyright 2015 The Kubernetes Authors 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.

# kubernetes-e2e-{gce, gke, gke-ci} jobs: This script is triggered by
# the kubernetes-build job, or runs every half hour. We abort this job
# if it takes more than 75m. As of initial commit, it typically runs
# in about half an hour.
#
# The "Workspace Cleanup Plugin" is installed and in use for this job,
# so the ${WORKSPACE} directory (the current directory) is currently
# empty.

set -o errexit
set -o nounset
set -o pipefail
set -o xtrace

if [[ "${CIRCLECI:-}" == "true" ]]; then
    JOB_NAME="circleci-${CIRCLE_PROJECT_USERNAME}-${CIRCLE_PROJECT_REPONAME}"
    BUILD_NUMBER=${CIRCLE_BUILD_NUM}
    WORKSPACE=`pwd`
else
    # Jenkins?
    export HOME=${WORKSPACE} # Nothing should want Jenkins $HOME
fi

# Additional parameters that are passed to ginkgo runner.
GINKGO_TEST_ARGS=${GINKGO_TEST_ARGS:-""}

if [[ "${PERFORMANCE:-}" == "true" ]]; then
    if [[ "${KUBERNETES_PROVIDER}" == "aws" ]]; then
      export MASTER_SIZE=${MASTER_SIZE:-"m3.xlarge"}
    else
      export MASTER_SIZE=${MASTER_SIZE:-"n1-standard-4"}
      export MINION_SIZE=${MINION_SIZE:-"n1-standard-2"}
    fi
    export NUM_MINIONS=${NUM_MINIONS:-"100"}
    GINKGO_TEST_ARGS=${GINKGO_TEST_ARGS:-"--ginkgo.focus=\[Performance suite\] "}
else
    if [[ "${KUBERNETES_PROVIDER}" == "aws" ]]; then
      export MASTER_SIZE=${MASTER_SIZE:-"t2.small"}
    else
      export MASTER_SIZE=${MASTER_SIZE:-"n1-standard-2"}
      export MINION_SIZE=${MINION_SIZE:-"n1-standard-2"}
    fi
    export NUM_MINIONS=${NUM_MINIONS:-"2"}
fi


# Unlike the kubernetes-build script, we expect some environment
# variables to be set. We echo these immediately and presume "set -o
# nounset" will force the caller to set them: (The first several are
# Jenkins variables.)

echo "JOB_NAME: ${JOB_NAME}"
echo "BUILD_NUMBER: ${BUILD_NUMBER}"
echo "WORKSPACE: ${WORKSPACE}"
echo "KUBERNETES_PROVIDER: ${KUBERNETES_PROVIDER}" # Cloud provider
echo "E2E_CLUSTER_NAME: ${E2E_CLUSTER_NAME}"       # Name of the cluster (e.g. "e2e-test-jenkins")
echo "E2E_NETWORK: ${E2E_NETWORK}"                 # Name of the network (e.g. "e2e")
echo "E2E_ZONE: ${E2E_ZONE}"                       # Name of the GCE zone (e.g. "us-central1-f")
echo "E2E_OPT: ${E2E_OPT}"                         # hack/e2e.go options
echo "E2E_SET_CLUSTER_API_VERSION: ${E2E_SET_CLUSTER_API_VERSION:-<not set>}" # optional, for GKE, set CLUSTER_API_VERSION to git hash
echo "--------------------------------------------------------------------------------"


# AWS variables
export KUBE_AWS_INSTANCE_PREFIX=${E2E_CLUSTER_NAME}
export KUBE_AWS_ZONE=${E2E_ZONE}

# GCE variables
export INSTANCE_PREFIX=${E2E_CLUSTER_NAME}
export KUBE_GCE_ZONE=${E2E_ZONE}
export KUBE_GCE_NETWORK=${E2E_NETWORK}

# GKE variables
export CLUSTER_NAME=${E2E_CLUSTER_NAME}
export ZONE=${E2E_ZONE}
export KUBE_GKE_NETWORK=${E2E_NETWORK}

export PATH=${PATH}:/usr/local/go/bin
export KUBE_SKIP_CONFIRMATIONS=y

# E2E Control Variables
export E2E_UP="${E2E_UP:-true}"
export E2E_TEST="${E2E_TEST:-true}"
export E2E_DOWN="${E2E_DOWN:-true}"

if [[ "${E2E_UP,,}" == "true" ]]; then
    if [[ ${KUBE_RUN_FROM_OUTPUT:-} =~ ^[yY]$ ]]; then
        echo "Found KUBE_RUN_FROM_OUTPUT=y; will use binaries from _output"
        cp _output/release-tars/kubernetes*.tar.gz .
    else
        echo "Pulling binaries from GCS"
        if [[ $(find . | wc -l) != 1 ]]; then
            echo $PWD not empty, bailing!
            exit 1
        fi

        # Tell kube-up.sh to skip the update, it doesn't lock. An internal
        # gcloud bug can cause racing component updates to stomp on each
        # other.
        export KUBE_SKIP_UPDATE=y
        sudo flock -x -n /var/run/lock/gcloud-components.lock -c "gcloud components update -q" || true

        # For GKE, we can get the server-specified version.
        if [[ ${JENKINS_USE_SERVER_VERSION:-} =~ ^[yY]$ ]]; then
            # We'll pull our TARs for tests from the release bucket.
            bucket="release"

            # Get the latest available API version from the GKE apiserver.
            # Trim whitespace out of the error message. This gives us something
            # like: ERROR:(gcloud.alpha.container.clusters.create)ResponseError:
            #       code=400,message=cluster.cluster_api_versionmustbeoneof:
            #       0.15.0,0.16.0.
            # The command should error, so we throw an || true on there.
            msg=$(gcloud alpha container clusters create this-wont-work \
                --zone=us-central1-f --cluster-api-version=0.0.0 2>&1 \
                | tr -d '[[:space:]]') || true
            # Strip out everything before the final colon, which gives us just
            # the allowed versions; something like "0.15.0,0.16.0." or "0.16.0."
            msg=${msg##*:}
            # Take off the final period, which gives us just comma-separated
            # allowed versions; something like "0.15.0,0.16.0" or "0.16.0"
            msg=${msg%%\.}
            # Split the version string by comma and read into an array, using
            # the last element as the githash, which will be like "v0.16.0".
            IFS=',' read -a varr <<< "${msg}"
            githash="v${varr[${#varr[@]} - 1]}"
        else
            # The "ci" bucket is for builds like "v0.15.0-468-gfa648c1"
            bucket="ci"
            # The "latest" version picks the most recent "ci" or "release" build.
            version_file="latest"
            if [[ ${JENKINS_USE_RELEASE_TARS:-} =~ ^[yY]$ ]]; then
                # The "release" bucket is for builds like "v0.15.0"
                bucket="release"
                if [[ ${JENKINS_USE_STABLE:-} =~ ^[yY]$ ]]; then
                    # The "stable" version picks the most recent "release" build.
                    version_file="stable"
                fi
            fi
            githash=$(gsutil cat gs://kubernetes-release/${bucket}/${version_file}.txt)
        fi
        # At this point, we want to have the following vars set:
        # - bucket
        # - githash
        gsutil -m cp gs://kubernetes-release/${bucket}/${githash}/kubernetes.tar.gz gs://kubernetes-release/${bucket}/${githash}/kubernetes-test.tar.gz .
    fi

    if [[ ! "${CIRCLECI:-}" == "true" ]]; then
        # Copy GCE keys so we don't keep cycling them.
        # To set this up, you must know the <project>, <zone>, and <instance> that
        # on which your jenkins jobs are running. Then do:
        #
        # # Get into the instance.
        # $ gcloud compute ssh --project="<prj>" ssh --zone="<zone>" <instance>
        #
        # # Generate a key by ssh'ing into itself, then exit.
        # $ gcloud compute ssh --project="<prj>" ssh --zone="<zone>" <instance>
        # $ ^D
        #
        # # Copy the keys to the desired location, e.g. /var/lib/jenkins/gce_keys/
        # $ sudo mkdir -p /var/lib/jenkins/gce_keys/
        # $ sudo cp ~/.ssh/google_compute_engine /var/lib/jenkins/gce_keys/
        # $ sudo cp ~/.ssh/google_compute_engine.pub /var/lib/jenkins/gce_keys/
        #
        # Move the permissions to jenkins.
        # $ sudo chown -R jenkins /var/lib/jenkins/gce_keys/
        # $ sudo chgrp -R jenkins /var/lib/jenkins/gce_keys/
        if [[ "${KUBERNETES_PROVIDER}" == "aws" ]]; then
            echo "Skipping SSH key copying for AWS"
        else
            mkdir -p ${WORKSPACE}/.ssh/
            cp /var/lib/jenkins/gce_keys/google_compute_engine ${WORKSPACE}/.ssh/
            cp /var/lib/jenkins/gce_keys/google_compute_engine.pub ${WORKSPACE}/.ssh/
        fi
    fi

    md5sum kubernetes*.tar.gz
    tar -xzf kubernetes.tar.gz
    tar -xzf kubernetes-test.tar.gz

    # Set by GKE-CI to change the CLUSTER_API_VERSION to the git version
    if [[ ! -z ${E2E_SET_CLUSTER_API_VERSION:-} ]]; then
        export CLUSTER_API_VERSION=$(echo ${githash} | cut -c 2-)
    elif [[ ${JENKINS_USE_RELEASE_TARS:-} =~ ^[yY]$ ]]; then
        release=$(gsutil cat gs://kubernetes-release/release/${version_file}.txt | cut -c 2-)
        export CLUSTER_API_VERSION=${release}
    fi
fi

cd kubernetes

# Have cmd/e2e run by goe2e.sh generate JUnit report in ${WORKSPACE}/junit*.xml
ARTIFACTS=${WORKSPACE}/_artifacts
mkdir -p ${ARTIFACTS}
export E2E_REPORT_DIR=${ARTIFACTS}

### Set up ###
if [[ "${E2E_UP,,}" == "true" ]]; then
    go run ./hack/e2e.go ${E2E_OPT} -v --down
    go run ./hack/e2e.go ${E2E_OPT} -v --up
    go run ./hack/e2e.go -v --ctl="version --match-server-version=false"
fi

### Run tests ###
# Jenkins will look at the junit*.xml files for test failures, so don't exit
# with a nonzero error code if it was only tests that failed.
if [[ "${E2E_TEST,,}" == "true" ]]; then
    go run ./hack/e2e.go ${E2E_OPT} -v --test --test_args="${GINKGO_TEST_ARGS} --ginkgo.noColor" || true
fi

# TODO(zml): We have a bunch of legacy Jenkins configs that are
# expecting junit*.xml to be in ${WORKSPACE} root and it's Friday
# afternoon, so just put the junit report where it's expected.
# If link already exists, non-zero return code should not cause build to fail.
for junit in ${ARTIFACTS}/junit*.xml; do
  ln -s -f ${junit} ${WORKSPACE} || true
done

### Clean up ###
if [[ "${E2E_DOWN,,}" == "true" ]]; then
    # Sleep before deleting the cluster to give the controller manager time to
    # delete any cloudprovider resources still around from the last test.
    # This is calibrated to allow enough time for 3 attempts to delete the
    # resources. Each attempt is allocated 5 seconds for requests to the
    # cloudprovider plus the processingRetryInterval from servicecontroller.go
    # for the wait between attempts.
    sleep 30
    go run ./hack/e2e.go ${E2E_OPT} -v --down
fi