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Use kubectl to get k8s context and namespace (#312)

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Add a way to get the current kubernetes context and default namespace in use using `kubectl`
This commit is contained in:
Caio Cezar Zapater de Souza
2019-09-12 12:11:36 -03:00
committed by Caio Gondim
parent cf54c3b9bd
commit 6a7b1ab36f
2 changed files with 25 additions and 9 deletions
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10
README.md
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@@ -193,9 +193,15 @@ NOTE: You do not need to specify *end* segment - it will be added automatically.
|`BULLETTRAIN_KCTX_BG`|`yellow`|Background color
|`BULLETTRAIN_KCTX_FG`|`white`|Foreground color
|`BULLETTRAIN_KCTX_PREFIX`|`⎈`|[Kubernetes](https://unicode-table.com/de/2388/) prefix of the segment
|`BULLETTRAIN_KCTX_KCONFIG`|`<MUST_BE_SET>`|Location of kube config file (e.g. /Users/Hugo/.kube/config)
|`BULLETTRAIN_KCTX_KUBECTL`|`true`|If `false` disable `kubectl` usage
|`BULLETTRAIN_KCTX_NAMESPACE`|`true`|If `false` will not show the default namespace. Namespace is only visible if `kubectl` is installed
|`BULLETTRAIN_KCTX_KCONFIG`|`${HOME}/.kube/config`|Location of kube config file (e.g. /Users/Hugo/.kube/config)
The prompt will first check if `BULLETTRAIN_KCTX_KUBECTL=true` and `kubectl` is installed than it will use `kubectl config view --minify` to determine the context and default namespace in use.
If `BULLETTRAIN_KCTX_KUBECTL=false` or `kubectl` is not installed, `BULLETTRAIN_KCTX_KCONFIG` will be parsed to get the current context.
The usage of `kubectl` allow the prompt to get the default namespace even if you are using multiple kube config files (e.g. KUBECONFIG=~/.kube/config:path-to-config1:path-to-config2)
`BULLETTRAIN_KCTX_KCONFIG` must be set, e.g. in .zshrc. There can be no default value and `~/` can not be reliably interpreted. The prompt will also do a sanity check whether `kubectl` is installed. If either condition fails, the prompt segment will not be drawn at all.
### AWS Profile

20
bullet-train.zsh-theme
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@@ -161,6 +161,15 @@ fi
if [ ! -n "${BULLETTRAIN_KCTX_PREFIX+1}" ]; then
BULLETTRAIN_KCTX_PREFIX="⎈"
fi
if [ ! -n "${BULLETTRAIN_KCTX_KCONFIG+1}" ]; then
BULLETTRAIN_KCTX_KCONFIG="${HOME}/.kube/config"
fi
if [ ! -n "${BULLETTRAIN_KCTX_KUBECTL+1}" ]; then
BULLETTRAIN_KCTX_KUBECTL="true"
fi
if [ ! -n "${BULLETTRAIN_KCTX_NAMESPACE+1}" ]; then
BULLETTRAIN_KCTX_NAMESPACE="true"
fi
# ELIXIR
if [ ! -n "${BULLETTRAIN_ELIXIR_BG+1}" ]; then
@@ -552,14 +561,15 @@ prompt_rust() {
# Kubernetes Context
prompt_kctx() {
if [[ ! -n $BULLETTRAIN_KCTX_KCONFIG ]]; then
return
if [[ "$BULLETTRAIN_KCTX_KUBECTL" == "true" ]] && command -v kubectl > /dev/null 2>&1; then
local jsonpath='{.current-context}'
if [[ "$BULLETTRAIN_KCTX_NAMESPACE" == "true" ]]; then
jsonpath="${jsonpath}{':'}{..namespace}"
fi
if command -v kubectl > /dev/null 2>&1; then
if [[ -f $BULLETTRAIN_KCTX_KCONFIG ]]; then
prompt_segment $BULLETTRAIN_KCTX_BG $BULLETTRAIN_KCTX_FG $BULLETTRAIN_KCTX_PREFIX" $(kubectl config view --minify --output "jsonpath=${jsonpath}" 2>/dev/null)"
elif [[ -f $BULLETTRAIN_KCTX_KCONFIG ]]; then
prompt_segment $BULLETTRAIN_KCTX_BG $BULLETTRAIN_KCTX_FG $BULLETTRAIN_KCTX_PREFIX" $(cat $BULLETTRAIN_KCTX_KCONFIG | grep current-context | awk '{print $2}')"
fi
fi
}
# Virtualenv: current working virtualenv