Add ARM64 & ARM32v7 build support

[transilluminate]

Tested working on Raspberry Pi 4 (Debian 12.4)
Linux 6.1.0-rpi7-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.63-1+rpt1 (2023-11-24) aarch64 GNU/Linux

$ docker build -t ping-exporter .
$ docker run -d -p 9346:9346 --name=ping-exporter ping-exporter
$ curl http://localhost:9346/ping?target=1.1.1.1

# HELP ping_resolve_time Time it take to resolve domain to an IP address
# TYPE ping_resolve_time gauge
ping_resolve_time{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 0
# HELP ping_packets_total Total number of sent pings
# TYPE ping_packets_total gauge
ping_packets_total{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 5
# HELP ping_packets_success Total number of success pings
# TYPE ping_packets_success gauge
ping_packets_success{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 5
# HELP ping_packets_failed Total number of failed pings
# TYPE ping_packets_failed gauge
ping_packets_failed{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 0
# HELP ping_packets_loss A percentage of failed pings from the total pings
# TYPE ping_packets_loss gauge
ping_packets_loss{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 0
# HELP ping_resolve_error Boolean metric if there's an error during the resolve (error message will be in "error" label)
# TYPE ping_resolve_error gauge
ping_resolve_error{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 0
# HELP ping_times A histogram of round-trip times
# TYPE ping_times histogram
ping_times_count{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 5
ping_times_bucket{le="11", count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 1
ping_times_bucket{le="12", count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 3
ping_times_bucket{le="16", count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 4
ping_times_bucket{le="17", count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 5
ping_times_bucket{le="+Inf", count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 5
ping_times_min{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 11
ping_times_max{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 17
ping_times_sum{count="5", ip="1.1.1.1", ping_timeout="1000", protocol="v4", resolve_timeout="1000", target="1.1.1.1"} 65

Nice :)

[maciej-gol]

Doesn't work for me (RPi 4, Debian 11):

$ docker build --no-cache -t ping-exporter .
Sending build context to Docker daemon  134.1kB
Step 1/27 : FROM --platform=linux/amd64 ekidd/rust-musl-builder:1.36.0 as builder
 ---> 199e6dcf7c1c
Step 2/27 : COPY Cargo.toml Makefile ./
 ---> bd8365f2270a
Step 3/27 : COPY src/ ./src/
 ---> 89d8945bffb2
Step 4/27 : RUN make
 ---> [Warning] The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm/v7) and no specific platform was requested
 ---> Running in 51f706c56215
exec /bin/sh: exec format error
The command '/bin/sh -c make' returned a non-zero code: 1