Adding some k8s related tools
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Lockszmith
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3 changed files with 473 additions and 0 deletions
268
watch-k3s-app
Executable file
268
watch-k3s-app
Executable file
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#! /usr/bin/env bash
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# [LICENSE: GPL3](https://www.gnu.org/licenses/gpl-3.0.en.html)
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# Author: [Lockszmith](https://stackexchange.com/users/421248/lockszmith) 2023-10(Oct)-08
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set -e
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eval "$SETX"
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ZELLIJ_PATH="${ZELLIJ_PATH:-$(which zellij)}" || true
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NOZELLIJ=${NOZELLIJ:-$NOWATCH}
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NOWATCH=${NOWATCH:-$NOZELLIJ}
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main() {
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if [[ -n "${ZELLIJ_PATH}" && -x "${ZELLIJ_PATH}" && -z "$NOZELLIJ" ]]; then
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printf "Starting zellij layout..." >&2
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$ZELLIJ_PATH ${INTAB:+action new-tab} --layout <(
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get_zellij_layout
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# ZELLIJ_PATH="$ZELLIJ_PATH" APP="$APP" NS="$NS" TAIL="$TAIL" \
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# envsubst < ~/watch-k3s-app.kdl
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)
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else
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unset ZELLIJ_PATH
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export NOZELLIJ=1 APP="$APP"
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$0 -- "charts"
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$0 -- "pvc"
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$0 -- "apps"
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$0 -- "services"
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$0 -- "events"
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$0 -- "pods"
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$0 -- "cnpg"
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$0 -- "logs"
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fi
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}
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get_zellij_layout() {
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cat - <<ZELLIJ_LAYOUT
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layout {
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pane_template name="watch_k3s_app" {
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command "$HOME/bin/watch-k3s-app"
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}
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pane_template name="charts" {
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watch_k3s_app name="CHARTS" size=5 {
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args "--" "charts" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="pvc" {
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watch_k3s_app name="PERSISTENT VOLUME CLAIMS (PVC)" size=9 {
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args "--" "pvc" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="apps" {
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watch_k3s_app name="DEPLOYMENT.APPS" {
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args "--" "apps" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="services" {
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watch_k3s_app name="SERVICES" size=9 {
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args "--" "services" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="services_and_apps" {
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pane split_direction="vertical" {
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apps size="35%"
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services
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}
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}
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pane_template name="events" {
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watch_k3s_app name="EVENTS" size=9 {
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args "--" "events" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="pods" {
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watch_k3s_app name="PODS" {
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args "--" "pods" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="pods_and_events" {
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pane split_direction="vertical" {
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pods size="40%"
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events
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}
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}
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pane_template name="logs" {
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watch_k3s_app name="LOGS ${APP}" {
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args "--" "logs" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="cnpg" {
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watch_k3s_app name="CLOUDNATIVE POSTGRESQL" size=9 {
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args "--" "cnpg" "KUBECONFIG=${KUBECONFIG}" "NS=${NS}" "APP=${APP}" "TAIL=${TAIL}" "SETX=${SETX}"
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}
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}
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pane_template name="logs_and_cnpg" {
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pane split_direction="vertical" {
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logs size="65%"
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cnpg
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}
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}
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pane split_direction="horizontal" {
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pane size=1 command="printf" borderless=true {
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args "### Watching kubernetes environment ${NS} --- [Ctrl+x] to close | [mouse-click]+[F11] Expand Pane | [Ctrl-C]+[Enter] to refersh"
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}
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// pane stacked=true {
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charts
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pvc
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// }
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services_and_apps
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pods_and_events
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logs_and_cnpg
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}
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}
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keybinds {
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shared {
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bind "Ctrl x" { CloseTab; }
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bind "F11" { ToggleFocusFullscreen; }
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}
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}
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pane_frames true
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ZELLIJ_LAYOUT
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}
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repeat_out() {
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dd if=/dev/zero bs=${2:-10} count=1 2>/dev/null | tr '\0' "${1:?Repeat character missing}"
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}
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visual_sleep() {
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local SLEEP=$(( 0 + ${1:-2} )) MSG="${MSG:-Restarting in %s %s}"
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tput sc;
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while (( SLEEP > 0 )); do
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tput el; printf "$MSG" "${SLEEP}s" "$(repeat_out . ${SLEEP})"
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sleep 1s
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tput rc 1; tput el;
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(( SLEEP-=1 )) || true
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done
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}
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[[ "$1" == "--" ]] || APP=${APP:-${1}}
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NS=${APP:+--namespace=ix-}${APP:---all-namespaces}
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case $1 in
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"--help")
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cat - <<USAGE
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Watch k3s apps (with zellij support) for TrueChart Apps on TrueNAS SCALE
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Usage:
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$(basename $0) [Installed App Name]
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$(basename $0) -- <output type> [<Set Expression1> [<Set Expression...>]]
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Invokation modifiers (environment variable):
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[NOREPEAT=1] [NOWATCH=1] [SLEEP=3] $(basename $0) ...
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Description:
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This script will pull from k3s the follwing:
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charts (helm charts)
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pvc
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apps (deployment.apps)
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services
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events
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pods
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cnpg status (applicable for APP only)
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contianer-logs (applicable for APP only)
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By default, if zellij exists, it will WATCH all of these for
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changes in parallel.
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If zellij doesn't exist, it will list all, SLEEP for a few seconds,
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then REPEAT.
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To produce output to share in bug reports, calling with
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NOREPEAT=1 NOWATCH=1 ...
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will output all the details and exit.
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If an APP is specified, output is confined to the specific
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namespace and service. Otherwise, it will output information about
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k3s all-namespaces.
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* For cnpg status, the cnpg plugin needs to be installed.
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On TrueNAS SCALE, this install might be required after a reboot.
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Zellij specific support
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When zellij exists and running, zellij will create a set of panes
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with the above list of views watching for changes in parallel.
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It maps <Ctrl>-<X> as the exit key.
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and it maps <F11> as a Full-Screen toggle, to use it you need to
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select inside a pane with a mouse, and then click the key.
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USAGE
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;;
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"--")
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eval "${*:3}"
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export KUBECONFIG
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K_WATCH="${ZELLIJ_PATH:+--watch-only --no-headers}"
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C_WATCH="watch -tcn4"
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[[ -z "$NOZELLIJ" && -z "$NOWATCH" ]] || { K_WATCH=''; C_WATCH='eval'; }
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case "$2" in
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"charts")
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${C_WATCH} "helm list ${NS} | sort"
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;;
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"pvc")
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k3s kubectl get pvc ${NS} --sort-by='.metadata.creationTimestamp'
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[[ -z "${K_WATCH}" ]] || k3s kubectl get pvc ${NS} ${K_WATCH}
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;;
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"apps")
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k3s kubectl get deployment.apps ${NS} --sort-by='.metadata.creationTimestamp'
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[[ -z "${K_WATCH}" ]] || k3s kubectl get deployment.apps ${NS} ${K_WATCH}
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;;
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"services")
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k3s kubectl get services ${NS} --sort-by='.metadata.creationTimestamp'
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[[ -z "${K_WATCH}" ]] || k3s kubectl get services ${NS} ${K_WATCH}
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;;
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"events")
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k3s kubectl get events ${NS} --sort-by='.metadata.creationTimestamp'
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[[ -z "${K_WATCH}" ]] || k3s kubectl get events ${NS} ${K_WATCH} \
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;;
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"pods")
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k3s kubectl get pods ${NS} --sort-by='.metadata.creationTimestamp'
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[[ -z "${K_WATCH}" ]] || k3s kubectl get pods ${NS} \
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${K_WATCH};
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;;
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"cnpg")
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sleep 0.4s;
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[[ -n "${APP}" ]] \
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&& ${C_WATCH} "k3s kubectl cnpg status ${NS} ${APP}-cnpg-main" \
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|| k3s kubectl get clusters.postgresql.cnpg.io ${NS} ${K_WATCH}
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;;
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"logs")
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MSG='N/A with --all-namespaces'
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if [[ -n "${APP}" ]]; then
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MSG="no pods active for $APP"
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APP=($(k3s kubectl get pods ${NS} --output name | grep -E "^pod/$APP(-[^-]+){2}$"))
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FOLLOW='--follow'
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[[ -z "$NOWATCH" ]] || { FOLLOW=''; TAIL=${TAIL:-40}; }
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while ! k3s kubectl logs ${NS} ${FOLLOW} ${TAIL:+--tail=${TAIL}} \
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"${APP}"; do
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printf 'could not load logs, checking for previous logs...\n'
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k3s kubectl logs ${NS} -p ${TAIL:+--tail=${TAIL}} "${APP}" \
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|| printf "${MSG}"
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[[ -z "$NOWATCH" ]] || break;
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visual_sleep ${SLEEP:-3}
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done
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fi
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;;
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*)
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printf "Don't know how to handle $2\n" 1>&2;
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false;
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;;
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esac
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;;
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*)
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while main "$1" && [[ -z "$NOREPEAT" ]]; do
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tput cuu1;
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visual_sleep ${SLEEP:-3}
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done
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esac
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