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83 lines
2.3 KiB
Bash
83 lines
2.3 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2022-01-06 09:10:40 +0000 (Thu, 06 Jan 2022)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Backups up and then re-runs a given Kubernetes job
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Backups are taken to the source directory of this script under the .kubectl_job_definitions/ directory before re-creating the job,
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just in case, as a delete operation must happen before the re-creation and if the re-creation fails the job definition would otherwise be lost
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Example:
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${0##*/} cert-manager-startupapicheck -n cert-manager
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<job_name> [<kubectl_options>]"
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help_usage "$@"
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min_args 1 "$@"
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job_name="$1"
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shift || :
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namespace=""
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args=()
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until [ $# -lt 1 ]; do
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case $1 in
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-n|--namespace) namespace="${2:-}"
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shift || :
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;;
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*) args+=("$1")
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;;
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esac
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shift || :
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done
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# if namespace was not set then try to infer from current context
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if [ -z "$namespace" ]; then
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namespace="$(kubectl config get-contexts | awk '/^\*/{print $5}')"
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fi
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# if not set in context, must be 'default'
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namespace="${namespace:-default}"
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#jobdir="${PWD:-$(pwd)}/.kubectl_job_definitions"
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jobdir="$srcdir/.kubectl_job_definitions"
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mkdir -p -v "$jobdir"
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jobfile="$jobdir/$namespace.$job_name.json"
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# backup the job because job recreation will fail after it is deleted if any of the fields prevent re-creation
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# remove the fields that prevent recreation
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if ! [ -f "$jobfile" ]; then
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kubectl get job "$job_name" ${namespace:+--namespace "$namespace"} ${args:+"${args[@]}"} -o json |
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jq -Mr 'del(.spec.selector)' |
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jq -Mr 'del(.spec.template.metadata.labels)' \
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> "$jobfile"
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fi
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kubectl replace --force -f "$jobfile"
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