You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.0 KiB
Bash
63 lines
2.0 KiB
Bash
#!/usr/bin/env bash
|
|
# vim:ts=4:sts=4:sw=4:et
|
|
#
|
|
# Author: Hari Sekhon
|
|
# Date: 2020-11-12 15:34:19 +0000 (Thu, 12 Nov 2020)
|
|
#
|
|
# https://github.com/HariSekhon/bash-tools
|
|
#
|
|
# License: see accompanying Hari Sekhon LICENSE file
|
|
#
|
|
# 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
|
|
#
|
|
# https://www.linkedin.com/in/HariSekhon
|
|
#
|
|
|
|
set -euo pipefail
|
|
[ -n "${DEBUG:-}" ] && set -x
|
|
srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
|
|
|
|
# shellcheck disable=SC1090
|
|
. "$srcdir/lib/utils.sh"
|
|
|
|
# shellcheck disable=SC2034,SC2154
|
|
usage_description="
|
|
Reads kubernetes yaml from stdin, extracts all namespace names and creates the namespaces via kubectl in the current context
|
|
|
|
This is needed because on blank installs doing a 'kubectl diff' can result in the following error:
|
|
|
|
Error from server (NotFound): namespaces \"blah\" not found
|
|
|
|
Instead you can first precreate the namespaces if they don't already exist, after which the diff will succeed:
|
|
|
|
${0##*/} file.yaml file2.yaml ...
|
|
|
|
or
|
|
|
|
kustomize build | ${0##*/}
|
|
|
|
|
|
Since this script applies to the current kubectl context, it is best used as part of other scripts such as kustomize_diff_apply.sh where the kube config and context are isolated and set to avoid race conditions by depending on global kube config which could be concurrently naively changed during execution by other scripts/shells
|
|
"
|
|
|
|
# used by usage() in lib/utils.sh
|
|
# shellcheck disable=SC2034
|
|
usage_args="[<file.yaml> <file2.yaml> ...]"
|
|
|
|
help_usage "$@"
|
|
|
|
no_more_opts "$@"
|
|
|
|
namespaces="$(awk '/^[[:space:]]*namespace:[[:space:]]*[a-z0-9]([-a-z0-9]*[a-z0-9])?[[:space:]]*$/{print $2}' "$@" | sort -u)"
|
|
|
|
current_namespaces="$(kubectl get namespaces -o jsonpath='{range .items[*]}{.metadata.name}{"\n"}')"
|
|
|
|
for namespace in $namespaces; do
|
|
if grep -Fxq "$namespace" <<< "$current_namespaces"; then
|
|
echo "namespace '$namespace' aleady exists"
|
|
else
|
|
kubectl create namespace "$namespace"
|
|
fi
|
|
echo
|
|
done
|