fix: use su

Author: Sebastian Spaink

telegraf/nightly/alpine/Dockerfile

@@ -1,7 +1,7 @@
 FROM alpine:3.14
 
 RUN echo 'hosts: files dns' >> /etc/nsswitch.conf
-RUN apk add --no-cache iputils ca-certificates net-snmp-tools procps lm_sensors tzdata && \
+RUN apk add --no-cache iputils ca-certificates net-snmp-tools procps lm_sensors tzdata su-exec && \
     update-ca-certificates
 
 

telegraf/nightly/entrypoint.sh

@@ -1,8 +1,12 @@
-#!/bin/bash
+#!/bin/sh
 set -e
 
 if [ "${1:0:1}" = '-' ]; then
     set -- telegraf "$@"
 fi
 
-exec "$@"
+if [ "$(id -u)" -ne 0 ]; then
+    exec "$@"
+else
+    exec su-exec telegraf "$@"
+fi