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| -rw-r--r-- | emacs/elisp/my-uptime.el | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/emacs/elisp/my-uptime.el b/emacs/elisp/my-uptime.el new file mode 100644 index 0000000..3522f91 --- /dev/null +++ b/emacs/elisp/my-uptime.el @@ -0,0 +1,55 @@ +;;; my-uptime.el --- calculates uptime for SLOs + +;;; Commentary: + +;; Calculate how much downtime is allowed for different period of time +;; based on a given SLO. + +;;; Code: + +(defconst my-uptime/buffer-name "*slo-calculator*") + +(defconst my-uptime/seconds-per-hour 3600 + "Number of seconds in an hour.") +(defconst my-uptime/seconds-per-day (* my-uptime/seconds-per-hour 24) + "Number of seconds in a day.") +(defconst my-uptime/seconds-per-week (* my-uptime/seconds-per-day 7) + "Number of seconds in a week.") +(defconst my-uptime/seconds-per-month (* my-uptime/seconds-per-day 30) + "Number of seconds in a month.") +(defconst my-uptime/seconds-per-quarter (* my-uptime/seconds-per-month 3) + "Number of seconds in a quarter.") +(defconst my-uptime/seconds-per-year (* my-uptime/seconds-per-month 12) + "Number of seconds in a year.") + +(defun my-uptime/is (slo) + "Return the amount of allowed downtime for a given SLO." + (interactive "nSLO:") + (let* ((slo (cond ((< slo 0) 0) + ((> slo 100) 100) + (t slo))) + (allowed (/ (- (* 100 100) (* slo 100.0)) (* 100 100)))) + (my-uptime/message allowed slo))) + +(defun my-uptime/message (seconds slo) + "Insert buffer text with allowed downtime based on SECONDS (derived from SLO)." + (let ((inhibit-read-only t) + (buffer-undo-list t)) + (pop-to-buffer my-uptime/buffer-name) + (erase-buffer) + (insert (format "calculated allowed downtime for %s%% availability.\n" slo)) + (insert + (format "daily: %s\n" (format-seconds "%H %M %S" (seconds-to-time (* my-uptime/seconds-per-day seconds))))) + (insert + (format "weekly: %s\n" (format-seconds "%H %M %S" (seconds-to-time (* my-uptime/seconds-per-week seconds))))) + (insert + (format "monthly: %s\n" (format-seconds "%D %H %M %S" (seconds-to-time (* my-uptime/seconds-per-month seconds))))) + (insert + (format "quarterly: %s\n" (format-seconds "%D %H %M %S" (seconds-to-time (* my-uptime/seconds-per-quarter seconds))))) + (insert + (format "yearly: %s\n" (format-seconds "%D %H %M %S" (seconds-to-time (* my-uptime/seconds-per-year seconds)))))) + (special-mode)) + +(provide 'my-uptime) + +;;; my-uptime.el ends here |