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601 lines
20 KiB
Bash
Executable File
601 lines
20 KiB
Bash
Executable File
#!/bin/bash
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# Copyright 2015 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# !!!EXPERIMENTAL !!! Upgrade script for GCE. Expect this to get
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# rewritten in Go in relatively short order, but it allows us to start
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# testing the concepts.
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set -o errexit
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set -o nounset
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set -o pipefail
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if [[ "${KUBERNETES_PROVIDER:-gce}" != "gce" ]]; then
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echo "!!! ${1} only works on GCE" >&2
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exit 1
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fi
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KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
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source "${KUBE_ROOT}/hack/lib/util.sh"
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source "${KUBE_ROOT}/cluster/kube-util.sh"
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function usage() {
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echo "!!! EXPERIMENTAL !!!"
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echo ""
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echo "${0} [-M | -N | -P] [-o] (-l | <version number or publication>)"
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echo " Upgrades master and nodes by default"
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echo " -M: Upgrade master only"
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echo " -N: Upgrade nodes only"
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echo " -P: Node upgrade prerequisites only (create a new instance template)"
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echo " -c: Upgrade NODE_UPGRADE_PARALLELISM nodes in parallel (default=1) within a single instance group. The MIGs themselves are dealt serially."
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echo " -o: Use os distro specified in KUBE_NODE_OS_DISTRIBUTION for new nodes. Options include 'debian' or 'gci'"
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echo " -l: Use local(dev) binaries. This is only supported for master upgrades."
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echo ""
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echo ' Version number or publication is either a proper version number'
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echo ' (e.g. "v1.0.6", "v1.2.0-alpha.1.881+376438b69c7612") or a version'
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echo ' publication of the form <bucket>/<version> (e.g. "release/stable",'
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echo ' "ci/latest-1"). Some common ones are:'
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echo ' - "release/stable"'
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echo ' - "release/latest"'
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echo ' - "ci/latest"'
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echo ' See the docs on getting builds for more information about version publication.'
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echo ""
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echo "(... Fetching current release versions ...)"
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echo ""
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# NOTE: IF YOU CHANGE THE FOLLOWING LIST, ALSO UPDATE test/e2e/cluster_upgrade.go
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local release_stable
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local release_latest
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local ci_latest
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release_stable=$(gsutil cat gs://kubernetes-release/release/stable.txt)
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release_latest=$(gsutil cat gs://kubernetes-release/release/latest.txt)
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ci_latest=$(gsutil cat gs://kubernetes-release-dev/ci/latest.txt)
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echo "Right now, versions are as follows:"
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echo " release/stable: ${0} ${release_stable}"
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echo " release/latest: ${0} ${release_latest}"
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echo " ci/latest: ${0} ${ci_latest}"
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}
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function print-node-version-info() {
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echo "== $1 Node OS and Kubelet Versions =="
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"${KUBE_ROOT}/cluster/kubectl.sh" get nodes -o=jsonpath='{range .items[*]}name: "{.metadata.name}", osImage: "{.status.nodeInfo.osImage}", kubeletVersion: "{.status.nodeInfo.kubeletVersion}"{"\n"}{end}'
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}
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function upgrade-master() {
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local num_masters
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num_masters=$(get-master-replicas-count)
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if [[ "${num_masters}" -gt 1 ]]; then
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echo "Upgrade of master not supported if more than one master replica present. The current number of master replicas: ${num_masters}"
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exit 1
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fi
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echo "== Upgrading master to '${SERVER_BINARY_TAR_URL}'. Do not interrupt, deleting master instance. =="
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# Tries to figure out KUBE_USER/KUBE_PASSWORD by first looking under
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# kubeconfig:username, and then under kubeconfig:username-basic-auth.
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# TODO: KUBE_USER is used in generating ABAC policy which the
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# apiserver may not have enabled. If it's enabled, we must have a user
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# to generate a valid ABAC policy. If the username changes, should
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# the script fail? Should we generate a default username and password
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# if the section is missing in kubeconfig? Handle this better in 1.5.
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get-kubeconfig-basicauth
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get-kubeconfig-bearertoken
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detect-master
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parse-master-env
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upgrade-master-env
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# Delete the master instance. Note that the master-pd is created
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# with auto-delete=no, so it should not be deleted.
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gcloud compute instances delete \
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--project "${PROJECT}" \
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--quiet \
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--zone "${ZONE}" \
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"${MASTER_NAME}"
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create-master-instance "${MASTER_NAME}-ip"
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wait-for-master
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}
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function upgrade-master-env() {
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echo "== Upgrading master environment variables. =="
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# Generate the node problem detector token if it isn't present on the original
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# master.
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if [[ "${ENABLE_NODE_PROBLEM_DETECTOR:-}" == "standalone" && "${NODE_PROBLEM_DETECTOR_TOKEN:-}" == "" ]]; then
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NODE_PROBLEM_DETECTOR_TOKEN=$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64 | tr -d "=+/" | dd bs=32 count=1 2>/dev/null)
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fi
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}
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function wait-for-master() {
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echo "== Waiting for new master to respond to API requests =="
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local curl_auth_arg
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if [[ -n ${KUBE_BEARER_TOKEN:-} ]]; then
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curl_auth_arg=(-H "Authorization: Bearer ${KUBE_BEARER_TOKEN}")
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elif [[ -n ${KUBE_PASSWORD:-} ]]; then
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curl_auth_arg=(--user "${KUBE_USER}:${KUBE_PASSWORD}")
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else
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echo "can't get auth credentials for the current master"
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exit 1
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fi
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until curl --insecure "${curl_auth_arg[@]}" --max-time 5 \
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--fail --output /dev/null --silent "https://${KUBE_MASTER_IP}/healthz"; do
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printf "."
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sleep 2
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done
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echo "== Done =="
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}
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# Perform common upgrade setup tasks
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#
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# Assumed vars
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# KUBE_VERSION
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function prepare-upgrade() {
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kube::util::ensure-temp-dir
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detect-project
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detect-subnetworks
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detect-node-names # sets INSTANCE_GROUPS
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write-cluster-location
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write-cluster-name
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tars_from_version
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}
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# Reads kube-env metadata from first node in NODE_NAMES.
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#
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# Assumed vars:
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# NODE_NAMES
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# PROJECT
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# ZONE
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function get-node-env() {
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# TODO(zmerlynn): Make this more reliable with retries.
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gcloud compute --project ${PROJECT} ssh --zone ${ZONE} ${NODE_NAMES[0]} --command \
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"curl --fail --silent -H 'Metadata-Flavor: Google' \
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'http://metadata/computeMetadata/v1/instance/attributes/kube-env'" 2>/dev/null
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}
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# Read os distro information from /os/release on node.
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# $1: The name of node
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#
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# Assumed vars:
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# PROJECT
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# ZONE
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function get-node-os() {
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gcloud compute ssh "$1" \
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--project "${PROJECT}" \
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--zone "${ZONE}" \
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--command \
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"cat /etc/os-release | grep \"^ID=.*\" | cut -c 4-"
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}
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# Assumed vars:
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# KUBE_VERSION
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# NODE_SCOPES
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# NODE_INSTANCE_PREFIX
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# PROJECT
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# ZONE
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#
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# Vars set:
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# KUBE_PROXY_TOKEN
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# NODE_PROBLEM_DETECTOR_TOKEN
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# CA_CERT_BASE64
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# EXTRA_DOCKER_OPTS
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# KUBELET_CERT_BASE64
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# KUBELET_KEY_BASE64
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function upgrade-nodes() {
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prepare-node-upgrade
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do-node-upgrade
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}
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function setup-base-image() {
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if [[ "${env_os_distro}" == "false" ]]; then
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echo "== Ensuring that new Node base OS image matched the existing Node base OS image"
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NODE_OS_DISTRIBUTION=$(get-node-os "${NODE_NAMES[0]}")
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if [[ "${NODE_OS_DISTRIBUTION}" == "cos" ]]; then
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NODE_OS_DISTRIBUTION="gci"
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fi
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source "${KUBE_ROOT}/cluster/gce/${NODE_OS_DISTRIBUTION}/node-helper.sh"
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# Reset the node image based on current os distro
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set-node-image
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fi
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}
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# prepare-node-upgrade creates a new instance template suitable for upgrading
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# to KUBE_VERSION and echos a single line with the name of the new template.
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#
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# Assumed vars:
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# KUBE_VERSION
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# NODE_SCOPES
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# NODE_INSTANCE_PREFIX
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# PROJECT
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# ZONE
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#
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# Vars set:
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# SANITIZED_VERSION
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# INSTANCE_GROUPS
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# KUBE_PROXY_TOKEN
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# NODE_PROBLEM_DETECTOR_TOKEN
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# CA_CERT_BASE64
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# EXTRA_DOCKER_OPTS
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# KUBELET_CERT_BASE64
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# KUBELET_KEY_BASE64
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function prepare-node-upgrade() {
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echo "== Preparing node upgrade (to ${KUBE_VERSION}). ==" >&2
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setup-base-image
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SANITIZED_VERSION=$(echo ${KUBE_VERSION} | sed 's/[\.\+]/-/g')
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# TODO(zmerlynn): Refactor setting scope flags.
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local scope_flags=
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if [ -n "${NODE_SCOPES}" ]; then
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scope_flags="--scopes ${NODE_SCOPES}"
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else
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scope_flags="--no-scopes"
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fi
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# Get required node env vars from exiting template.
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local node_env=$(get-node-env)
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KUBE_PROXY_TOKEN=$(get-env-val "${node_env}" "KUBE_PROXY_TOKEN")
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NODE_PROBLEM_DETECTOR_TOKEN=$(get-env-val "${node_env}" "NODE_PROBLEM_DETECTOR_TOKEN")
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CA_CERT_BASE64=$(get-env-val "${node_env}" "CA_CERT")
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EXTRA_DOCKER_OPTS=$(get-env-val "${node_env}" "EXTRA_DOCKER_OPTS")
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KUBELET_CERT_BASE64=$(get-env-val "${node_env}" "KUBELET_CERT")
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KUBELET_KEY_BASE64=$(get-env-val "${node_env}" "KUBELET_KEY")
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upgrade-node-env
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# TODO(zmerlynn): How do we ensure kube-env is written in a ${version}-
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# compatible way?
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write-node-env
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# TODO(zmerlynn): Get configure-vm script from ${version}. (Must plumb this
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# through all create-node-instance-template implementations).
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local template_name=$(get-template-name-from-version ${SANITIZED_VERSION})
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create-node-instance-template "${template_name}"
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# The following is echo'd so that callers can get the template name.
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echo "Instance template name: ${template_name}"
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echo "== Finished preparing node upgrade (to ${KUBE_VERSION}). ==" >&2
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}
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function upgrade-node-env() {
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echo "== Upgrading node environment variables. =="
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# Get the node problem detector token from master if it isn't present on
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# the original node.
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if [[ "${ENABLE_NODE_PROBLEM_DETECTOR:-}" == "standalone" && "${NODE_PROBLEM_DETECTOR_TOKEN:-}" == "" ]]; then
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detect-master
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local master_env=$(get-master-env)
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NODE_PROBLEM_DETECTOR_TOKEN=$(get-env-val "${master_env}" "NODE_PROBLEM_DETECTOR_TOKEN")
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fi
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}
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# Upgrades a single node.
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# $1: The name of the node
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#
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# Note: This is called multiple times from do-node-upgrade() in parallel, so should be thread-safe.
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function do-single-node-upgrade() {
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local -r instance="$1"
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instance_id=$(gcloud compute instances describe "${instance}" \
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--format='get(id)' \
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--project="${PROJECT}" \
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--zone="${ZONE}" 2>&1) && describe_rc=$? || describe_rc=$?
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if [[ "${describe_rc}" != 0 ]]; then
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echo "== FAILED to describe ${instance} =="
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echo "${instance_id}"
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return ${describe_rc}
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fi
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# Drain node
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echo "== Draining ${instance}. == " >&2
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"${KUBE_ROOT}/cluster/kubectl.sh" drain --delete-local-data --force --ignore-daemonsets "${instance}" \
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&& drain_rc=$? || drain_rc=$?
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if [[ "${drain_rc}" != 0 ]]; then
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echo "== FAILED to drain ${instance} =="
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return ${drain_rc}
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fi
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# Recreate instance
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echo "== Recreating instance ${instance}. ==" >&2
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recreate=$(gcloud compute instance-groups managed recreate-instances "${group}" \
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--project="${PROJECT}" \
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--zone="${ZONE}" \
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--instances="${instance}" 2>&1) && recreate_rc=$? || recreate_rc=$?
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if [[ "${recreate_rc}" != 0 ]]; then
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echo "== FAILED to recreate ${instance} =="
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echo "${recreate}"
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return ${recreate_rc}
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fi
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# Wait for instance to be recreated
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echo "== Waiting for instance ${instance} to be recreated. ==" >&2
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while true; do
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new_instance_id=$(gcloud compute instances describe "${instance}" \
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--format='get(id)' \
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--project="${PROJECT}" \
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--zone="${ZONE}" 2>&1) && describe_rc=$? || describe_rc=$?
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if [[ "${describe_rc}" != 0 ]]; then
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echo "== FAILED to describe ${instance} =="
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echo "${new_instance_id}"
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echo " (Will retry.)"
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elif [[ "${new_instance_id}" == "${instance_id}" ]]; then
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echo -n .
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else
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echo "Instance ${instance} recreated."
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break
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fi
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sleep 1
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done
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# Wait for k8s node object to reflect new instance id
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echo "== Waiting for new node to be added to k8s. ==" >&2
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while true; do
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external_id=$("${KUBE_ROOT}/cluster/kubectl.sh" get node "${instance}" --output=jsonpath='{.spec.externalID}' 2>&1) && kubectl_rc=$? || kubectl_rc=$?
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if [[ "${kubectl_rc}" != 0 ]]; then
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echo "== FAILED to get node ${instance} =="
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echo "${external_id}"
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echo " (Will retry.)"
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elif [[ "${external_id}" == "${new_instance_id}" ]]; then
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echo "Node ${instance} recreated."
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break
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elif [[ "${external_id}" == "${instance_id}" ]]; then
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echo -n .
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else
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echo "Unexpected external_id '${external_id}' matches neither old ('${instance_id}') nor new ('${new_instance_id}')."
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echo " (Will retry.)"
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fi
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sleep 1
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done
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# Wait for the node to not have SchedulingDisabled=True and also to have
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# Ready=True.
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echo "== Waiting for ${instance} to become ready. ==" >&2
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while true; do
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cordoned=$("${KUBE_ROOT}/cluster/kubectl.sh" get node "${instance}" --output='jsonpath={.status.conditions[?(@.type == "SchedulingDisabled")].status}')
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ready=$("${KUBE_ROOT}/cluster/kubectl.sh" get node "${instance}" --output='jsonpath={.status.conditions[?(@.type == "Ready")].status}')
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if [[ "${cordoned}" == 'True' ]]; then
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echo "Node ${instance} is still not ready: SchedulingDisabled=${ready}"
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elif [[ "${ready}" != 'True' ]]; then
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echo "Node ${instance} is still not ready: Ready=${ready}"
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else
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echo "Node ${instance} Ready=${ready}"
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break
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fi
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sleep 1
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done
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}
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# Prereqs:
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# - prepare-node-upgrade should have been called successfully
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function do-node-upgrade() {
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echo "== Upgrading nodes to ${KUBE_VERSION} with max parallelism of ${node_upgrade_parallelism}. ==" >&2
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# Do the actual upgrade.
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# NOTE(zmerlynn): If you are changing this gcloud command, update
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# test/e2e/cluster_upgrade.go to match this EXACTLY.
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local template_name=$(get-template-name-from-version ${SANITIZED_VERSION})
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local old_templates=()
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local updates=()
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for group in ${INSTANCE_GROUPS[@]}; do
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old_templates+=($(gcloud compute instance-groups managed list \
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--project="${PROJECT}" \
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--filter="name ~ '${group}' AND zone:(${ZONE})" \
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--format='value(instanceTemplate)' || true))
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set_instance_template_out=$(gcloud compute instance-groups managed set-instance-template "${group}" \
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--template="${template_name}" \
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--project="${PROJECT}" \
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--zone="${ZONE}" 2>&1) && set_instance_template_rc=$? || set_instance_template_rc=$?
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if [[ "${set_instance_template_rc}" != 0 ]]; then
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echo "== FAILED to set-instance-template for ${group} to ${template_name} =="
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echo "${set_instance_template_out}"
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return ${set_instance_template_rc}
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fi
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instances=()
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instances+=($(gcloud compute instance-groups managed list-instances "${group}" \
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--format='value(instance)' \
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--project="${PROJECT}" \
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--zone="${ZONE}" 2>&1)) && list_instances_rc=$? || list_instances_rc=$?
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if [[ "${list_instances_rc}" != 0 ]]; then
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echo "== FAILED to list instances in group ${group} =="
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echo "${instances}"
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return ${list_instances_rc}
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fi
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process_count_left=${node_upgrade_parallelism}
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pids=()
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ret_code_sum=0 # Should stay 0 in the loop iff all parallel node upgrades succeed.
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for instance in ${instances[@]}; do
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do-single-node-upgrade "${instance}" & pids+=("$!")
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# We don't want to run more than ${node_upgrade_parallelism} upgrades at a time,
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# so wait once we hit that many nodes. This isn't ideal, since one might take much
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# longer than the others, but it should help.
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process_count_left=$((process_count_left - 1))
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if [[ process_count_left -eq 0 || "${instance}" == "${instances[-1]}" ]]; then
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# Wait for each of the parallel node upgrades to finish.
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for pid in "${pids[@]}"; do
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wait $pid
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ret_code_sum=$(( ret_code_sum + $? ))
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done
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# Return even if at least one of the node upgrades failed.
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if [[ ${ret_code_sum} != 0 ]]; then
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echo "== Some of the ${node_upgrade_parallelism} parallel node upgrades failed. =="
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return ${ret_code_sum}
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fi
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process_count_left=${node_upgrade_parallelism}
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fi
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done
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done
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# Remove the old templates.
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echo "== Deleting old templates in ${PROJECT}. ==" >&2
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for tmpl in ${old_templates[@]}; do
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gcloud compute instance-templates delete \
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--quiet \
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--project="${PROJECT}" \
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"${tmpl}" || true
|
|
done
|
|
|
|
echo "== Finished upgrading nodes to ${KUBE_VERSION}. ==" >&2
|
|
}
|
|
|
|
master_upgrade=true
|
|
node_upgrade=true
|
|
node_prereqs=false
|
|
local_binaries=false
|
|
env_os_distro=false
|
|
node_upgrade_parallelism=1
|
|
|
|
while getopts ":MNPlcho" opt; do
|
|
case ${opt} in
|
|
M)
|
|
node_upgrade=false
|
|
;;
|
|
N)
|
|
master_upgrade=false
|
|
;;
|
|
P)
|
|
node_prereqs=true
|
|
;;
|
|
l)
|
|
local_binaries=true
|
|
;;
|
|
c)
|
|
node_upgrade_parallelism=${NODE_UPGRADE_PARALLELISM:-1}
|
|
;;
|
|
o)
|
|
env_os_distro=true
|
|
;;
|
|
h)
|
|
usage
|
|
exit 0
|
|
;;
|
|
\?)
|
|
echo "Invalid option: -$OPTARG" >&2
|
|
usage
|
|
exit 1
|
|
;;
|
|
esac
|
|
done
|
|
shift $((OPTIND-1))
|
|
|
|
if [[ $# -gt 1 ]]; then
|
|
echo "Error: Only one parameter (<version number or publication>) may be passed after the set of flags!" >&2
|
|
usage
|
|
exit 1
|
|
fi
|
|
|
|
if [[ $# -lt 1 ]] && [[ "${local_binaries}" == "false" ]]; then
|
|
usage
|
|
exit 1
|
|
fi
|
|
|
|
if [[ "${master_upgrade}" == "false" ]] && [[ "${node_upgrade}" == "false" ]]; then
|
|
echo "Can't specify both -M and -N" >&2
|
|
exit 1
|
|
fi
|
|
|
|
# prompt if etcd storage media type isn't set unless using etcd2 when doing master upgrade
|
|
if [[ -z "${STORAGE_MEDIA_TYPE:-}" ]] && [[ "${STORAGE_BACKEND:-}" != "etcd2" ]] && [[ "${master_upgrade}" == "true" ]]; then
|
|
echo "The default etcd storage media type in 1.6 has changed from application/json to application/vnd.kubernetes.protobuf."
|
|
echo "Documentation about the change can be found at https://kubernetes.io/docs/admin/etcd_upgrade."
|
|
echo ""
|
|
echo "ETCD2 DOES NOT SUPPORT PROTOBUF: If you wish to have to ability to downgrade to etcd2 later application/json must be used."
|
|
echo ""
|
|
echo "It's HIGHLY recommended that etcd be backed up before this step!!"
|
|
echo ""
|
|
echo "To enable using json, before running this script set:"
|
|
echo "export STORAGE_MEDIA_TYPE=application/json"
|
|
echo ""
|
|
if [ -t 0 ] && [ -t 1 ]; then
|
|
read -p "Would you like to continue with the new default, and lose the ability to downgrade to etcd2? [y/N] " confirm
|
|
if [[ "${confirm}" != "y" ]]; then
|
|
exit 1
|
|
fi
|
|
else
|
|
echo "To enable using protobuf, before running this script set:"
|
|
echo "export STORAGE_MEDIA_TYPE=application/vnd.kubernetes.protobuf"
|
|
echo ""
|
|
echo "STORAGE_MEDIA_TYPE must be specified when run non-interactively." >&2
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
# Prompt if etcd image/version is unspecified when doing master upgrade.
|
|
# In e2e tests, we use TEST_ALLOW_IMPLICIT_ETCD_UPGRADE=true to skip this
|
|
# prompt, simulating the behavior when the user confirms interactively.
|
|
# All other automated use of this script should explicitly specify a version.
|
|
if [[ "${master_upgrade}" == "true" ]]; then
|
|
if [[ -z "${ETCD_IMAGE:-}" && -z "${TEST_ETCD_IMAGE:-}" ]] || [[ -z "${ETCD_VERSION:-}" && -z "${TEST_ETCD_VERSION:-}" ]]; then
|
|
echo
|
|
echo "***WARNING***"
|
|
echo "Upgrading Kubernetes with this script might result in an upgrade to a new etcd version."
|
|
echo "Some etcd version upgrades, such as 3.0.x to 3.1.x, DO NOT offer a downgrade path."
|
|
echo "To pin the etcd version to your current one (e.g. v3.0.17), set the following variables"
|
|
echo "before running this script:"
|
|
echo
|
|
echo "# example: pin to etcd v3.0.17"
|
|
echo "export ETCD_IMAGE=3.0.17"
|
|
echo "export ETCD_VERSION=3.0.17"
|
|
echo
|
|
echo "Alternatively, if you choose to allow an etcd upgrade that doesn't support downgrade,"
|
|
echo "you might still be able to downgrade Kubernetes by pinning to the newer etcd version."
|
|
echo "In all cases, it is strongly recommended to have an etcd backup before upgrading."
|
|
echo
|
|
if [ -t 0 ] && [ -t 1 ]; then
|
|
read -p "Continue with default etcd version, which might upgrade etcd? [y/N] " confirm
|
|
if [[ "${confirm}" != "y" ]]; then
|
|
exit 1
|
|
fi
|
|
elif [[ "${TEST_ALLOW_IMPLICIT_ETCD_UPGRADE:-}" != "true" ]]; then
|
|
echo "ETCD_IMAGE and ETCD_VERSION must be specified when run non-interactively." >&2
|
|
exit 1
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
print-node-version-info "Pre-Upgrade"
|
|
|
|
if [[ "${local_binaries}" == "false" ]]; then
|
|
set_binary_version ${1}
|
|
fi
|
|
|
|
prepare-upgrade
|
|
|
|
if [[ "${node_prereqs}" == "true" ]]; then
|
|
prepare-node-upgrade
|
|
exit 0
|
|
fi
|
|
|
|
if [[ "${master_upgrade}" == "true" ]]; then
|
|
upgrade-master
|
|
fi
|
|
|
|
if [[ "${node_upgrade}" == "true" ]]; then
|
|
if [[ "${local_binaries}" == "true" ]]; then
|
|
echo "Upgrading nodes to local binaries is not yet supported." >&2
|
|
exit 1
|
|
else
|
|
upgrade-nodes
|
|
fi
|
|
fi
|
|
|
|
echo "== Validating cluster post-upgrade =="
|
|
"${KUBE_ROOT}/cluster/validate-cluster.sh"
|
|
|
|
print-node-version-info "Post-Upgrade"
|