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#!/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: 2021-02-25 10:10:53 +0000 (Thu, 25 Feb 2021)
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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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# ============================================================================ #
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# K u b e r n e t e s D i r e n v
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# ============================================================================ #
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# https://direnv.net/man/direnv-stdlib.1.html
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# See Also:
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#
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# .envrc
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# .envrc-aws
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# .envrc-gcp
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# direnv stdlib - loads .envrc from parent dir up to /
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#
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# useful to accumulate parent and child directory .envrc settings eg. adding Kubernetes namespace, ArgoCD app etc.
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#
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# bypasses security authorization though - use with care
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#source_up
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#
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# source_up must be loaded before set -u otherwise gets this error:
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#
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# direnv: loading .envrc
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# /bin/bash: line 226: $1: unbound variable
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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if [ "$1" = "${BASH_SOURCE[0]##*/}" ]; then
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shift
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fi
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# XXX: Edit this - hardcode for localized convenience
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CONTEXT="${1:-docker-desktop}"
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# if set will also set the namespace for extra convenience
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NAMESPACE="${2:-}"
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#NAMESPACE="jenkins"
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# function so can place in topdir .envrc and have subdirs 'source_up' or simply . ../.envrc to reuse this code among many .envrc environments
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kube_context(){
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local context="$1"
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local namespace="${2:-}"
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if command -v kubectl &>/dev/null; then
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local tmpdir="/tmp/.kube"
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mkdir -pv "$tmpdir"
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local default_kubeconfig="${HOME:-$(cd ~ && pwd)}/.kube/config"
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local original_kubeconfig="${KUBECONFIG:-$default_kubeconfig}"
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# reload safety - do not source from new tmpdir - not necessary for direnv but useful for local sourcing tests
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#if [[ "$original_kubeconfig" =~ $tmpdir ]]; then
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# echo "ignoring \$KUBECONFIG=$original_kubeconfig, using default home location $default_kubeconfig"
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# original_kubeconfig="$default_kubeconfig"
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#fi
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# isolate the kubernetes context to avoid a race condition affecting any other shells or scripts
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# epoch is added because $$ and $PPID are direnv sub-processes and may be reused later, so using epoch to add uniqueness
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local epoch
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epoch="$(date +%s)"
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export KUBECONFIG="$tmpdir/config.${EUID:-${UID:-$(id -u)}}.$$.$epoch"
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# load your real kube config to isolated staging area to source the context info
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if [ -f "$original_kubeconfig" ]; then
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cp "$original_kubeconfig" "$KUBECONFIG"
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elif [ -f "$default_kubeconfig" ]; then
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cp "$default_kubeconfig" "$KUBECONFIG"
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elif [ -f "$PWD/.kube/config" ]; then
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cp "$PWD/.kube/config" "$KUBECONFIG"
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else
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echo "WARNING: failed to find one of:
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$original_kubeconfig
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$default_kubeconfig
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$PWD/.kube/config
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" >&2
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fi
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if kubectl config get-contexts -o name 2>/dev/null | grep -Fxq "$context"; then
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kubectl config use-context "$CONTEXT"
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if [ -n "${namespace:-}" ]; then
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kubectl config set-context "$context" --namespace "$namespace"
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fi
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fi
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fi
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}
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gke_kube_context(){
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local CONTEXT
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export CLOUDSDK_CONTAINER_CLUSTER="${CLOUDSDK_CORE_PROJECT}-${CLOUDSDK_COMPUTE_REGION}"
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CONTEXT="gke_${CLOUDSDK_CORE_PROJECT}_${CLOUDSDK_COMPUTE_REGION}_${CLOUDSDK_CONTAINER_CLUSTER}"
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kube_context "$CONTEXT" "${NAMESPACE:-}"
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}
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kube_context "$CONTEXT" "$NAMESPACE"
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#export ARGOCD_SERVER="argocd.mycompany.com"
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#export ARGOCD_OPTS="${ARGOCD_OPTS:-} --grpc-web"
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#if [ -n "${ARGOCD_AUTH_TOKEN_MYCOMPANY_OR_ENV:-}" ]; then
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# export ARGOCD_AUTH_TOKEN="$ARGOCD_AUTH_TOKEN_MYCOMPANY_OR_ENV"
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#fi
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#export ARGOCD_APP="myapp"
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