nddashboardswitch.sh

#!/usr/bin/env bash

NETDATA_CONF_URL="http://127.0.0.1:19999/netdata.conf"

DASHBOARD_RELEASE_TAG="${1}"
DASHBOARD_LATEST_RELEASE_URL="https://api.github.com/repos/netdata/dashboard/releases/latest"
DASHBOARD_DOWNLOAD_URL="https://github.com/netdata/dashboard/releases/download/TAG/dashboard.tar.gz"
DASHBOARD_FILE="dashboard.tar.gz"

RCol='\e[0m'
BRed='\e[1;31m'
BGre='\e[1;32m'
BYel='\e[1;33m'

info() {
    printf "%b[info]%b %s\n" "$BGre" "$RCol" "${@}"
}

warn() {
    printf "%b[warn]%b %s\n" "$BYel" "$RCol" "${@}"
}

fatal() {
    printf "%b[fatal]%b %s\n" "$BRed" "$RCol" "${@}"
    exit 1
}

info "using Netdata REST API to fetch web files configuration"
netdata_conf=$(curl -sS --max-time 5 "$NETDATA_CONF_URL")
[ -z "$netdata_conf" ] && fatal "failed to fetch web files configuration from $NETDATA_CONF_URL"

WEB_DIR=$(echo "$netdata_conf" | grep -m 1 "web files directory" | awk '{print $NF}' ORS='')
WEB_OWNER=$(echo "$netdata_conf" | grep -m 1 "web files owner" | awk '{print $NF}' ORS='')
WEB_GROUP=$(echo "$netdata_conf" | grep -m 1 "web files group" | awk '{print $NF}' ORS='')
[ -z "$WEB_DIR" ] && fatal "failed to extract 'web files directory'"

if [ -z "$DASHBOARD_RELEASE_TAG" ]; then
    warn "using GitHub API to fetch dashboard latest tag"
    warn "for unauthenticated requests, the rate limit allows for up to 60 requests per hour"
    warn "provide a specific tag if you bump into the limit (see https://github.com/netdata/dashboard/releases)"
    if ! DASHBOARD_RELEASE_TAG=$(curl -sS --max-time 5 $DASHBOARD_LATEST_RELEASE_URL | grep "tag_name" | cut -d'"' -f4) ||
        [ -z "$DASHBOARD_RELEASE_TAG" ]; then
        fatal "failed to fetch dashboard release tag from ${DASHBOARD_LATEST_RELEASE_URL}"
    fi
fi

DASHBOARD_DOWNLOAD_URL=${DASHBOARD_DOWNLOAD_URL//"TAG"/$DASHBOARD_RELEASE_TAG}

info "you are about to:"
info " - download dashboard ${DASHBOARD_RELEASE_TAG} (${DASHBOARD_DOWNLOAD_URL})"
info " - extract it to the ${WEB_DIR}"
[ -n "$WEB_OWNER" ] && [ -n "$WEB_GROUP" ] && info " - change ${WEB_DIR} files ownership to ${WEB_OWNER}:${WEB_GROUP}"
info "procced? (press CTRL-C to exit)"
read -rn 1

if [[ $(id -u) -ne 0 ]]; then
    fatal "please run as root"
fi

DASHBOARD_FILE="dashboard.tar.gz"
[ -f "$DASHBOARD_FILE" ] && rm "$DASHBOARD_FILE"

if ! curl -sSfLJ --max-time 30 -o "$DASHBOARD_FILE" "$DASHBOARD_DOWNLOAD_URL"; then
    fatal "failed to download dashboard from $DASHBOARD_DOWNLOAD_URL"
fi

if ! tar -xf "$DASHBOARD_FILE" --strip-components=1 -C "${WEB_DIR}/"; then
    fatal "failed to extract dashboard.tar.gz into ${WEB_DIR}"
fi

[ -f "$DASHBOARD_FILE" ] && rm "$DASHBOARD_FILE"

if [ -n "$WEB_OWNER" ] && [ -n "$WEB_GROUP" ]; then
    if ! chown -R "${WEB_OWNER}:${WEB_GROUP}" "${WEB_DIR}/"; then
        fatal "failed to chown ${WEB_DIR}/ content"
    fi
fi

info "dashboard ${DASHBOARD_RELEASE_TAG} is successfully installed!"