Namely when deleting and re-provisioning an instance with the same name, the DNS answers seem to alternate between nxdomain and the ip address (tested ~5 min after creation of the instance)
filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud Host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud not found: 3(NXDOMAIN) filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 Host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud not found: 3(NXDOMAIN) filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 Host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud not found: 3(NXDOMAIN) filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud Host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud not found: 3(NXDOMAIN) filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 Host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud not found: 3(NXDOMAIN) filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud Host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud not found: 3(NXDOMAIN) filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 filippo@pontoon-thanos-02:~$
resolv.conf looks like this:
filippo@pontoon-thanos-02:~$ cat /etc/resolv.conf ## THIS FILE IS MANAGED BY PUPPET ## ## source: modules/base/resolv.conf.labs.erb ## from: base::resolving domain monitoring.eqiad1.wikimedia.cloud search monitoring.eqiad1.wikimedia.cloud eqiad1.wikimedia.cloud nameserver 208.80.154.143 nameserver 208.80.154.24 options timeout:1 ndots:1
The instance's new address is 172.16.0.213 which after a little while starts appearing as the answer, although the old IP is still returned sometimes:
filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.0.213 filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.0.213 filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129 filippo@pontoon-thanos-02:~$ host pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud pontoon-ms-be-01.monitoring.eqiad1.wikimedia.cloud has address 172.16.1.129
I couldn't find documentation on the expected timings for when the new address will be fully propagated, what's the expectation? Thanks!