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:run: cabpk: Add retries to control plane join
Signed-off-by: Naadir Jeewa <[email protected]>
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Naadir Jeewa
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Mar 25, 2020
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129 changes: 129 additions & 0 deletions
129
bootstrap/kubeadm/internal/cloudinit/kubeadm-bootstrap-script.sh
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| #!/bin/bash | ||
| # Copyright 2020 The Kubernetes Authors. | ||
| # | ||
| # 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. | ||
|
|
||
| # Log an error and exit. | ||
| # Args: | ||
| # $1 Message to log with the error | ||
| # $2 The error code to return | ||
| log::error_exit() { | ||
| local message="${1}" | ||
| local code="${2}" | ||
|
|
||
| log::error "${message}" | ||
| log::info "Removing member from cluster status" | ||
| kubeadm reset -f update-cluster-status || true | ||
| log::info "Removing etcd member" | ||
| kubeadm reset -f remove-etcd-member || true | ||
| log::info "Resetting kubeadm" | ||
| kubeadm reset -f || true | ||
| log::error "cluster.x-k8s.io kubeadm bootstrap script $0 exiting with status ${code}" | ||
| exit "${code}" | ||
| } | ||
|
|
||
| log::success_exit() { | ||
| log::info "cluster.x-k8s.io kubeadm bootstrap script $0 finished" | ||
| exit 0 | ||
| } | ||
|
|
||
| # Log an error but keep going. | ||
| log::error() { | ||
| local message="${1}" | ||
| timestamp=$(date --iso-8601=seconds) | ||
| echo "!!! [${timestamp}] ${1}" >&2 | ||
| shift | ||
| for message; do | ||
| echo " ${message}" >&2 | ||
| done | ||
| } | ||
|
|
||
| # Print a status line. Formatted to show up in a stream of output. | ||
| log::info() { | ||
| timestamp=$(date --iso-8601=seconds) | ||
| echo "+++ [${timestamp}] ${1}" | ||
| shift | ||
| for message; do | ||
| echo " ${message}" | ||
| done | ||
| } | ||
|
|
||
| check_kubeadm_command() { | ||
| local command="${1}" | ||
| local code="${2}" | ||
| case ${code} in | ||
| "0") | ||
| log::info "kubeadm reported successful execution for ${command}" | ||
| ;; | ||
| "1") | ||
| log::error "kubeadm reported failed action(s) for ${command}" | ||
| ;; | ||
| "2") | ||
| log::error "kubeadm reported preflight check error during ${command}" | ||
| ;; | ||
| "3") | ||
| log::error_exit "kubeadm reported validation error for ${command}" | ||
| ;; | ||
| *) | ||
| log::error "kubeadm reported unknown error ${code} for ${command}" | ||
| ;; | ||
| esac | ||
| } | ||
|
|
||
| function retry-command() { | ||
| n=0 | ||
| local kubeadm_return | ||
| until [ $n -ge 5 ]; do | ||
| log::info "running '$*'" | ||
| # shellcheck disable=SC1083 | ||
| "$@" --config /tmp/kubeadm-controlplane-join-config.yaml {{.KubeadmVerbosity}} | ||
| kubeadm_return=$? | ||
| check_kubeadm_command "'$*'" "${kubeadm_return}" | ||
| if [ ${kubeadm_return} -eq 0 ]; then | ||
| break | ||
| fi | ||
| # We allow preflight errors to pass | ||
| if [ ${kubeadm_return} -eq 2 ]; then | ||
| break | ||
| fi | ||
| n=$((n + 1)) | ||
| sleep 15 | ||
| done | ||
| if [ ${kubeadm_return} -ne 0 ]; then | ||
| log::error_exit "too many errors, exiting" | ||
| fi | ||
| } | ||
|
|
||
| function try-or-die-command() { | ||
| local kubeadm_return | ||
| log::info "running '$*'" | ||
| # shellcheck disable=SC1083 | ||
| "$@" --config /tmp/kubeadm-controlplane-join-config.yaml {{.KubeadmVerbosity}} | ||
| kubeadm_return=$? | ||
| check_kubeadm_command "'$*'" "${kubeadm_return}" | ||
| if [ ${kubeadm_return} -ne 0 ]; then | ||
| log::error_exit "fatal error, exiting" | ||
| fi | ||
| } | ||
|
|
||
| retry-command kubeadm join phase preflight | ||
| retry-command kubeadm join phase control-plane-prepare download-certs | ||
| retry-command kubeadm join phase control-plane-prepare certs | ||
| retry-command kubeadm join phase control-plane-prepare kubeconfig | ||
| retry-command kubeadm join phase control-plane-prepare control-plane | ||
| retry-command kubeadm join phase kubelet-start | ||
| try-or-die-command kubeadm join phase control-plane-join etcd | ||
| retry-command kubeadm join phase control-plane-join update-status | ||
| retry-command kubeadm join phase control-plane-join mark-control-plane | ||
|
|
||
| log::success_exit |
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