copy-paste tool for measuring RTT for Google Cloud Platform regions

This is based on the Google's official tool gcping.

Usage:

gcloud_ping.py [-h] [--csv] [-c PING_COUNT] [-i PING_INTERVAL] [--sort] [--list] [regions ...]

Positional arguments:

• regions Regions to ping / list (if omitted, defaults to all regions).

Options:

• -h --help Show the help message and exit.
• --csv Output in CSV format.
• -c --ping-count PING_COUNT Number of ping cycles. Default is 64.
• -i --ping-interval PING_INTERVAL Interval (in seconds) between ping cycles. Default is 1.
• -s --sort Sort regions by average RTT (ascending) when printing the results.
• -l --list List regions without pinging.

A ping cycle is the pinging of all regions specified.

The average is calculated using a Winsorized Mean, which is basically a Trimmed Mean but clamps outliers instead of discarding them. The lower and upper limits were chosen carefully arbitrarily.

Google's current IP addresses

• For clients of Google Cloud Platform, see Google Cloud Platform IP ranges per region.
• For other Google services, see Google user IP ranges.