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add dns functionality #11

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41c586a
add dns functionality
gergnz Apr 9, 2021
0a61ceb
fix readme markdown
gergnz Apr 9, 2021
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9 changes: 5 additions & 4 deletions README.md
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Expand Up @@ -5,9 +5,9 @@ tinystatus generate an html status page via shell script.
## Features

* Parallel checks
* HTTP, ping, port checks
* HTTP, ping, port, dns checks
* HTTP expected status code (401, ...)
* Minimal dependencies (curl, nc and coreutils)
* Minimal dependencies (curl, nc, dig and coreutils)
* Easy configuration and customisation
* Incident history (manual)

Expand Down Expand Up @@ -36,6 +36,7 @@ Command can be:
* `http` - Check http status
* `ping` - Check ping status
* `port` - Check open port status
* `dns` - Check dns status

There are also `http4`, `http6`, `ping4`, `ping6`, `port4`, `port6` for IPv4 or IPv6 only check.
Note: `port4` and `port6` require OpenBSD `nc` binary.
There are also `http4`, `http6`, `ping4`, `ping6`, `port4`, `port6`, `dns4`, `dns6` for IPv4 or IPv6 only check.
Note: `port4` and `port6` require OpenBSD `nc` binary; `dns4` and `dns6` require Bind9 `dig` binary;
5 changes: 5 additions & 0 deletions checks.csv
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Expand Up @@ -4,3 +4,8 @@ http6, 200, Google Website (IPv6), https://google.com
http, 404, Google 404, https://google.com/dummy
ping, 0, Google ping, 8.8.8.8
port, 0, Google DNS, 8.8.8.8 53
dns6, 0, Google DNS Test 1, AAAA;www.google.com;2001:4860:4860::8888
dns4, 0, Google DNS Test 2, AAAA;www.google.com;2001:4860:4860::8888
dns6, 0, Google DNS Test 3, AA;www.google.com;8.8.8.8
dns4, 0, Google DNS Test 4, AA;www.google.com;8.8.8.8
dns, 0, Google DNS Test 5, AA;www.google.com;8.8.8.8
12 changes: 12 additions & 0 deletions tinystatus
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Expand Up @@ -19,6 +19,10 @@ get_element(){
echo "${2}" | awk -v col="${1}" -F',' '{gsub(/^[ \t]+|[ \t]+$/, "", $col); print $col}'
}

get_item(){
echo "${2}" | awk -v col="${1}" -F';' '{gsub(/^[ \t]+|[ \t]+$/, "", $col); print $col}'
}

check(){
ctype="${1}"
host="${2}"
Expand All @@ -37,6 +41,13 @@ check(){
error="$(nc -${IPv}w "${timeout}" -zv ${host} 2>&1)"
statuscode=$?
[ "${statuscode}" -ne "${expectedcode}" ] && echo "${error}" > "${tmp}/ko/${name}.error";;
dns*)
rrtype=$(get_item 1 "${host}")
rrhost=$(get_item 2 "${host}")
dnsserver=$(get_item 3 "${host}")
dig +short -${IPv}u "${rrtype}" "${rrhost}" @"${dnsserver}" > "${tmp}/ko/${name}.tmp" 2>&1
statuscode=$?
[ "${statuscode}" -ne "${expectedcode}" ] && mv "${tmp}/ko/${name}.tmp" "${tmp}/ko/${name}.error";;
esac

# verity status and write files
Expand All @@ -55,6 +66,7 @@ check(){
command_exists 'curl'
command_exists 'nc'
command_exists 'ping'
command_exists 'dig'
mkdir -p "${tmp}/ok" "${tmp}/ko" || exit 1

while IFS="$(printf '\n')" read -r line; do
Expand Down