chore: change DNS record TTL from 10 minutes to 2 seconds #70
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deansheather
approved these changes
Apr 9, 2025
| // Coder: We've changed this from 10 minutes to 2 seconds, as we'd like to use | ||
| // the existence of Coder Connect DNS records to determine whether Coder Connect | ||
| // is running. | ||
| const defaultTTL = 2 * time.Second |
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10 seconds sounds better to me. The only time that records will conflict will be during a restart of a workspace, which I would guess takes 20-30 seconds in the fastest possible template.
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We aren't just worried about records with conflicting IP addresses, we are worried about turning off Coder Connect entirely and then using some other tool to connect to the workspace, and having the OS return a stale record indicating that Coder Connect is running when it isn't.
So, the relevant time scale is how quickly a human can turn off Coder Connect and then switch to another tool, not a workspace restart.
ethanndickson
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Apr 11, 2025
Relates to coder/internal#466 Brings in coder/tailscale#70
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Relates to coder/internal#466
This modifies the TTL of all DNS records programmed into the DNS resolver.
I've tested this by running Coder Desktop macOS against a fresh dylib: