134 lines
4 KiB
Bash
134 lines
4 KiB
Bash
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#!/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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# Script to update etcd objects as per the latest API Version.
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# This just reads all objects and then writes them back as is to ensure that
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# they are written using the latest API version.
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#
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# Steps to use this script to upgrade the cluster to a new version:
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# https://github.com/kubernetes/kubernetes/blob/master/docs/cluster_management.md#updgrading-to-a-different-api-version
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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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KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
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source "${KUBE_ROOT}/hack/lib/init.sh"
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KUBECTL="${KUBE_OUTPUT_HOSTBIN}/kubectl"
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# List of resources to be updated.
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# TODO: Get this list of resources from server once
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# http://issue.k8s.io/2057 is fixed.
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declare -a resources=(
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"endpoints"
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"events"
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"limitranges"
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"namespaces"
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"nodes"
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"pods"
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"persistentvolumes"
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"persistentvolumeclaims"
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"replicationcontrollers"
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"resourcequotas"
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"secrets"
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"services"
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"jobs"
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"horizontalpodautoscalers"
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)
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# Find all the namespaces.
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namespaces=( $("${KUBECTL}" get namespaces -o go-template="{{range.items}}{{.metadata.name}} {{end}}"))
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if [ -z "${namespaces:-}" ]
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then
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echo "Unexpected: No namespace found. Nothing to do."
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exit 1
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fi
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all_failed=1
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for resource in "${resources[@]}"
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do
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for namespace in "${namespaces[@]}"
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do
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# If get fails, assume it's because the resource hasn't been installed in the apiserver.
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# TODO hopefully we can remove this once we use dynamic discovery of gettable/updateable
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# resources.
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set +e
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instances=( $("${KUBECTL}" get "${resource}" --namespace="${namespace}" -o go-template="{{range.items}}{{.metadata.name}} {{end}}"))
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result=$?
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set -e
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if [[ "${all_failed}" -eq 1 && "${result}" -eq 0 ]]; then
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all_failed=0
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fi
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# Nothing to do if there is no instance of that resource.
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if [[ -z "${instances:-}" ]]
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then
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continue
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fi
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for instance in "${instances[@]}"
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do
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# Read and then write it back as is.
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# Update can fail if the object was updated after we fetched the
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# object, but before we could update it. We, hence, try the update
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# operation multiple times. But 5 continuous failures indicate some other
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# problem.
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success=0
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for (( tries=0; tries<5; ++tries ))
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do
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filename="/tmp/k8s-${namespace}-${resource}-${instance}.json"
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( "${KUBECTL}" get "${resource}" "${instance}" --namespace="${namespace}" -o json > "${filename}" ) || true
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if [[ ! -s "${filename}" ]]
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then
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# This happens when the instance has been deleted. We can hence ignore
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# this instance.
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echo "Looks like ${instance} got deleted. Ignoring it"
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continue
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fi
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output=$("${KUBECTL}" replace -f "${filename}" --namespace="${namespace}") || true
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rm "${filename}"
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if [ -n "${output:-}" ]
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then
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success=1
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break
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fi
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done
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if [[ "${success}" -eq 0 ]]
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then
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echo "Error: failed to update ${resource}/${instance} in ${namespace} namespace after 5 tries"
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exit 1
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fi
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done
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if [[ "${resource}" == "namespaces" ]] || [[ "${resource}" == "nodes" ]]
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then
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# These resources are namespace agnostic. No need to update them for every
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# namespace.
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break
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fi
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done
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done
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if [[ "${all_failed}" -eq 1 ]]; then
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echo "kubectl get failed for all resources"
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exit 1
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fi
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echo "All objects updated successfully!!"
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exit 0
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