Comment 3 for bug 1850862

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George Kraft (cynerva) wrote :

The /16, /15, and /12 CIDRs that you have in your juju-no-proxy are still large enough for the problem to occur.

CIDRs are "supported" when using juju-no-proxy.
CIDRs are not supported at all when using no_proxy.

Our attempt to support CIDRs in juju-no-proxy is what's breaking you here.

When you set both juju-no-proxy and no_proxy, the problem does not occur because no_proxy overrides juju-no-proxy, and we make no attempt to support CIDRs in no_proxy. So the proxy configuration no longer breaks when you set both, but you should know that containerd will completely ignore the CIDRs in no_proxy.