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Diffstat (limited to '')
| -rw-r--r-- | init.el | 1 | ||||
| -rw-r--r-- | lisp/my-uptime.el | 63 |
2 files changed, 64 insertions, 0 deletions
@@ -49,6 +49,7 @@ (require 'init-elfeed) (require 'my-denote) +(require 'my-uptime) (report-time-since-load) diff --git a/lisp/my-uptime.el b/lisp/my-uptime.el new file mode 100644 index 0000000..7d1665c --- /dev/null +++ b/lisp/my-uptime.el @@ -0,0 +1,63 @@ +;;; my-uptime.el --- calculates uptime for SLOs + +;;; Commentary: + +;; Calculate how much downtime is allowed for different periods of time +;; based on a given SLO. Display results in an aligned org-mode table. + +;;; Code: + +(require 'org) + +(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) + (org-mode) + (insert (format "* Calculated allowed downtime for %.2f%% availability\n\n" slo)) + (insert "| Time Period | Allowed Downtime |\n") + (insert "|-------------+-------------------|\n") + (dolist (period '(("Daily" . my-uptime/seconds-per-day) + ("Weekly" . my-uptime/seconds-per-week) + ("Monthly" . my-uptime/seconds-per-month) + ("Quarterly" . my-uptime/seconds-per-quarter) + ("Yearly" . my-uptime/seconds-per-year))) + (let* ((period-name (car period)) + (period-seconds (symbol-value (cdr period))) + (downtime (seconds-to-time (* period-seconds seconds)))) + (insert (format "| %s | %s |\n" + period-name + (format-seconds "%D %H:%M:%S" downtime))))) + (insert "|-------------+-------------------|\n") + (org-table-align) + (goto-char (point-min)))) + +(provide 'my-uptime) + +;;; my-uptime.el ends here |