5 releases
0.4.4 | Feb 21, 2024 |
---|---|
0.4.3 | Feb 20, 2024 |
0.4.2 | Feb 17, 2024 |
0.4.1 | Feb 17, 2024 |
0.3.0 | Feb 5, 2024 |
#811 in Web programming
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31KB
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runner
A personal project that runs commands and submits the execution result to a configurable instance of healthchecks.io (>=v3, requires auto-provisioning).
The URL for your HealthChecks instance, including your ping_key
, is required
at runtime*. Because the ping_key
is considered a secret, users may wish to
keep it out of their shell history and out of any cron scripts that are calling
hc-runner
; to this end, as an alternative to the --url
flag, the URL can
also be specified in a config file or by the HC_RUNNER_URL
environment
variable. All other options are taken only from command line flags.
Please consider restricting access (e.g. chmod 0600
) to any files that
contain your ping_key
, possibly including the hc-runner
config file.
* If you're using the hosted healthchecks server, your URL may look something
like https://hc-ping.com/{ping_key}/
.
Quickstart
$ cargo run -q -- --help
Command runner for healthchecks.io
Usage: hc-runner [OPTIONS] --slug <NAME> <COMMAND>...
Arguments:
<COMMAND>...
Options:
-q, --quiet Silence logging / warnings. Does not affect called command's output
-s, --slug <NAME> Set healthchecks slug for this call
--success-only Disable calling `/start` and only ping healthchecks if the test was successful
-t, --timeout <TIMEOUT> Set timeout for requests to healthchecks server [default: 10]
-u, --url <URL> Specify the URL of the healthchecks server for this call
-v, --verbose... Increase logging verbosity. May be repeated. Defaults to `Level::WARN`
-h, --help Print help
-V, --version Print version
runner
:
- by default sends a request to
/start
to mark the beginning of the scripts execution and uses?create=1
here to create a new healthcheck for this slug if it doesn't already exist - by default sends a request to
/{status_code}
to mark the end of execution and reflect the exit status (e.g./0
for successful exit) and sends stderr as the body - mirrors the exit status, stdout, and stderr of the called command
- can optionally only report successful runs with
--success-only
- this will prevent failure notifications for services that are expected to fail sometimes, but for which notifications are still desired if there isn't at least one successful run per (healthchecks-configured) time period
- does not report execution time or collect stderr
- can disambiguate flags in the called command using
-- trailing args
syntax, e.g.:hc-runner -v -- command
makeshc-runner
more verbosehc-runner -- command -v
passes the-v
flag tocommand
hc-runner -v -- command -v
does both
- prepends commands with
/usr/bin/caffeinate
on MacOS to keep long-running commands alive
Example:
$ git clone https://github.com/n8henrie/runner-rs.git
$ cd runner-rs
$ export HC_RUNNER_URL=http://your.server.url
$ cargo build --release
$ ./target/release/runner --slug say_foo -- echo foo
foo
$ echo $?
0
$ ./target/release/runner \
--slug epic_fail \
-- bash -c 'echo bar >/dev/stderr; exit 1'
bar
$ echo $?
1
Notes
debugging
-vvv
is your friend. Note that the output will contain your ping_key
.
Due to the default of create=1
, you will pollute your HealthChecks instance
when testing with fake slugs (--slug=foo
), but your output will be cluttered
with errors if you use a fake URL (--url=http://broken
). During testing /
experimentation, consider using --success-only
with a command that is
guaranteed to fail (e.g. false
) which will prevent calls to the server
entirely.
testing
The integration tests use the httpmock
library to provide a mock server.
Testing should be done with --test-threads=1
or errors will likely result. The
make test
target sets this for you.
macOS
On macOS, runner
prefixes commands with caffeinate
in order to keep
long-running processes awake.
Newer versions of macOS have built-in privacy and security tools that may
prevent runner
from accessing sensitive directories like ~/Documents
,
particularly if run in an automated script from launchd
. The install-macos
target in the Makefile
includes a workaround that should read RUNNER_URL
from config.env
(see config-sample.env
), compile and install the project,
then present some permissions dialogs to allow you to give access to these
directories to runner
. If the scripts you are running do not access
sensitive directories such as ~/Desktop
, ~/Documents
, ~/Downloads
, don't
bother with this. If you do use this approach, you'll have to remove a check
named runner-rs-setup-delete-me
from your healthchecks.io instance.
Alternatives
There are several similar projects on crates.io that may be much more comprehensive and/or functional than this hobby project. I encourage you to check them out! Here are a couple:
Acknowledgements
- Pēteris Caune, creator of healthchecks.io!
Dependencies
~14–33MB
~472K SLoC