echoidcf opened a new issue #4285:
URL: https://github.com/apache/cloudstack/issues/4285
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##### ISSUE TYPE
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* Bug Report
##### COMPONENT NAME
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Categorize the issue, e.g. API, VR, VPN, UI, etc.
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VR/Loadbalancer
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##### CLOUDSTACK VERSION
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branch.
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All version after 4.11 (maybe)
4.7 are not affected
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##### CONFIGURATION
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Information about the configuration if relevant, e.g. basic network,
advanced networking, etc. N/A otherwise
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VR with dnsmasq network service offering
##### OS / ENVIRONMENT
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##### SUMMARY
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Because dnsmasq daemon is using tcp53 port, haproxy can not use that port
again.
Set a loadbalancer rule for public port 53 will result in error while
start/reload/restarting haproxy.
After 4.11, haproxy is reload/restart via python script (CsHelper.py)
But CsHelper.py nevery not check if reload/restart is ok, haproxy is killed
permanently after setting this loadbalancer rule.
The rule can be set without any error/warning, and loadbalancer service is
down after that.
##### STEPS TO REPRODUCE
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1. create/use a network offerings with DNS and LB services.
2. create a LB rule with public 53
After that rule is added with error, but haproxy down completely.
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##### EXPECTED RESULTS
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##### ACTUAL RESULTS
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