[FEATURE] Add check_internet_connection function #102
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luc14n0
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transactional-update is also present on systems with e.g. wicked. There is no dependency to NetworkManager. |
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Sure, I'm gonna split the PR and research whether wicked has a similar facility, otherwise we can put a condition there. |
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luc14n0
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Wicked doesn't seem to have anything similar to |
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I had an interesting experience. I installed Wicked here and it pulled in sysconfig-netconfig, which in turn messed up name resolution. And So if we go forward with this proposition of mine, we'd be better off using |
luc14n0
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Alright, this should be ready, only waiting for #103 that I really would love to see getting merged. I dropped the use of |
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I'm gonna hold on on the re-indentation PR for now, and focus on redoing the check_internet_connection to not depend on that so we can move on discussing/declining it. I do believe this check is interesting to have, since it will short-circuit the whole update transaction even before calling Zypper, since it makes sure we can resolve names (no only that we have internet connectivity) first. |
Make sure that the system is online, by checking system's domain name resolvability, with the help of nslookup tool. It waits up to 30 seconds (by default), while probing known worl-wide resilient internet domains, to try to make up for loss of connectivity - especially for systems with suspension enabled where after waking up they don't come back online quick enough - before doing any operation that involves downloading data with Zypper. This feature also acts as a short-circuit for Zypper transactions bound to fail due to working connection unavailability.
luc14n0
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I made the assumption that transactional-update are only present in systems with NetworkManager. In case that's not true, please let me know so I can adjust it.
Please note that I haven't actually tested these changes as I'm not able to, currently. If someone could do some testing, it would be much appreciated by me.