Show progress bar during reboot/reflash and show estimated time remaining in MM:SS.

[pmilazzo]

Description

When rebooting or reflashing the node, display a progress bar as
well as the estimated time remaining. Also, show the time remaining
in MM:SS format.

[aanon4]

Just confirming you've tested this patch before I commit it? Touching the code around the flash process always makes me a little cautious.

[aanon4]

So I had chance to try this on my x86 instance this morning. Only tried the flashing version using Safari. On this, rather than the Wriring Firmware progress bar slowly changing, it does a Night Rider / Cylon impression and moves the bar back and forth. I guess this is a browser compatibility thing.

[pmilazzo]

Tim: thanks for testing! I don't have a way to test with Safari, but in other browsers the Cylon effect means that the value attribute of the progress element hasn't been set. I don't initialize value in the original document, so the Cylon effect is expected until the first execution of the cdown() function. The Cylons will now also reappear if the estimated time expires, to suggest that the remaining interval is unknown (and perhaps that you should be relocating your Battlestar ASAP...).

I made a few tweaks I hope will improve browser compatibility; it seems to work with Chrome, Edge, and Firefox.

I have tested flashing both with and without retaining the configuration.

[aanon4]

That seems to have made Safari happy.