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109 lines
2.9 KiB
Bash
109 lines
2.9 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: 2024-05-01 23:50:24 +0400 (Wed, 01 May 2024)
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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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. "$srcdir/lib/aws.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Downloads Rancher kubectl configs for all kubernetes clusters in Rancher
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to a directory structure matching the cluster names under the current or given directory
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This is fastest way to get set up with local kubectl access in new Rancher environments
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Generates a .envrc in each directory to quickly auto-load using direnv if no .envrc already exists
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Also generates a local kubeconfig.all in the top level directory with its own .envrc if you want to use that instead
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Requires Rancher CLI to be set up and configured, as well as jq
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See also:
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install_rancher_cli.sh
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aws_kube_creds.sh - same as this script but for AWS EKS clusters
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gke_kube_creds.sh - same as this script but for GCP GKE clusters
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="[<directory> <cluster1> <cluster2> <cluster3>...]"
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help_usage "$@"
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if ! type -P rancher &>/dev/null; then
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"$srcdir/../install/install_rancher_cli.sh"
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fi
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dir="${1:-.}"
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shift || :
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cd "$dir" || die "Failed to cd to '$dir'"
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if [ $# -gt 0 ]; then
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clusters="$*"
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else
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timestamp "Getting list of Rancher clusters"
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clusters="$(rancher clusters ls --format json | jq -r '.Cluster.name')"
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echo
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fi
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for cluster in $clusters; do
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timestamp "Getting kubeconfig for Rancher cluster '$cluster'"
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mkdir -p "$cluster"
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base="$PWD/$cluster"
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kubeconfig="$base/kubeconfig"
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envrc="$base/.envrc"
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rancher clusters kubeconfig "$cluster" > "$kubeconfig"
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timestamp "Downloaded '$kubeconfig'"
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if ! [ -f "$envrc" ]; then
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timestamp "Generating '$envrc'"
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cat >> "$envrc" <<-EOF
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export KUBECONFIG="\$PWD/kubeconfig"
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EOF
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if type -P direnv &>/dev/null; then
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timestamp "Direnv allowing '$envrc'"
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direnv allow "$envrc"
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fi
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fi
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echo
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done
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timestamp "Finished downloading Rancher kubeconfigs"
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echo
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timestamp "Merging configs into $PWD/kubeconfig.all"
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# shellcheck disable=SC2012
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# find . -maxdepth 2 -name kubeconfig
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KUBECONFIG=$(ls "$PWD"/*/kubeconfig | tr '\n' ':')
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export KUBECONFIG
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kubectl config view --merge --flatten > kubeconfig.all
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echo
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if ! [ -f .envrc ]; then
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timestamp "Generating $PWD/.envrc"
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cat >> .envrc <<-EOF
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export KUBECONFIG="\$PWD/kubeconfig.all"
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EOF
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direnv allow .envrc
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echo
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fi
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timestamp "Done"
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