DNS in Alpine is notoriously buggy but it can get months until you realise that. One easy and effective solution is to force dns resolution like so dnsConfig:

DNS in Alpine is notoriously buggy but it can get months until you realise that. One easy and effective solution is to force dns resolution like so dnsConfig: options: - name: ndots value: '1' cc: https://support.cloudbees.com/hc/en-us/articles/360040999471-UnknownHostException-caused-by-DNS-Resolution-issue-with-Alpine-Images https://support.cloudbees.com/hc/en-us/articles/360040999471... There are also plenty of dormant issue, enough so that I won't be using Alpine ever again imo :'(