feat: Add randomSpread and RunInterval to checks

This commit introduces two new optional parameters to the check configuration:

- `randomSpread`: This parameter allows specifying a random sleep time up to N seconds before a check is executed. This is useful to avoid all checks running at the same time.
- `RunInterval`: This parameter defines the minimum interval in seconds between two executions of a check. This is useful if gogios is run more frequently than a specific check should be.

The `README.md` has been updated to document these new features.

fix: Fix deadlock when skipping checks

This commit also fixes a deadlock that occurred when a check was skipped due to the `RunInterval` setting. The `inputWg.Done()` was not being called, causing the main goroutine to wait forever.

build: Replace Taskfile with Magefile

The `Taskfile.yml` has been replaced with a `Magefile.go` to manage the build process. This provides more flexibility and is more idiomatic for Go projects.

1 files changed, 10 insertions, 4 deletions

diff --git a/README.md b/README.md
index ae596e3..3c2e334 100644
--- a/README.md
+++ b/README.md
@@ -117,13 +117,15 @@ To configure Gogios, create a JSON configuration file (e.g., `/etc/gogios.json`)
       "Plugin": "/usr/local/libexec/nagios/check_ping",
       "Args": [ "-H", "www.foo.zone", "-4", "-w", "50,10%", "-c", "100,15%" ],
       "Retries": 3,
-      "RetryInterval": 10
+      "RetryInterval": 10,
+      "RandomSpread": 60
     },
     "Check ICMP6 www.foo.zone": {
       "Plugin": "/usr/local/libexec/nagios/check_ping",
-      "Args": [ "-H", "www.foo.zone", "-6", "-w", "50,10%", "-c", "100,15%" ]
+      "Args": [ "-H", "www.foo.zone", "-6", "-w", "50,10%", "-c", "100,15%" ],
       "Retries": 3,
-      "RetryInterval": 10
+      "RetryInterval": 10,
+      "RunInterval": 300
     },
     "www.foo.zone HTTP IPv4": {
       "Plugin": "/usr/local/libexec/nagios/check_http",
@@ -157,6 +159,10 @@ If you want to execute checks only when another check succeeded (status OK), use
 
 `Retries` and `RetryInterval` are optional check configuration parameters. In case of failure, Gogios will retry `Retries` times each `RetryInterval` seconds.
 
+`RandomSpread` is an optional check configuration parameter. It will cause a random sleep of up to N seconds (specified by config by each check) before the check is being executed. This is useful to avoid all checks running at the same time.
+
+`RunInterval` is an optional check configuration parameter. It defines the minimum interval in seconds between two executions of a check. This is useful if you run gogios more frequently than you want to run a specific check.
+
 For remote checks, use the `check_nrpe` plugin. You also need to have the NRPE server set up correctly on the target host (out of scope for this document).
 
 The `state.json` file mentioned above keeps track of the monitoring state and check results between Gogios runs, enabling Gogios only to send email notifications when there are changes in the check status.
@@ -202,4 +208,4 @@ My primary goal was to have a single email address for notifications and a simpl
 
 This led me to create Gogios, a lightweight monitoring tool tailored to my specific needs. I chose the Go programming language for this project as it allowed me to refresh my Go programming skills and provided a robust platform for developing a fast and efficient monitoring tool.
 
-Gogios eliminates unnecessary features and focuses on simplicity, providing a no-frills monitoring solution for small-scale self-hosted servers and virtual machines. The result is a tool that is easy to configure, set up, and maintain, ensuring that monitoring your resources is as hassle-free as possible.
+Gogios eliminates unnecessary features and focuses on simplicity, providing a no-frills monitoring solution for small-scale self-hosted servers and virtual machines. The result is a tool that is easy to configure, set up, and maintain, ensuring that monitoring your resources is as hassle-free as possible.
\ No newline at end of file