DevOps　(i.e.,　Development　and　Operations)　is　a　growing　concept,　which　aims　to　make　building,　testing,　and　releasing　software　faster,　more　frequent,　and　more　reliable　by　automating　the　software　delivery　and　architectural　change　process.　Since　DevOps　is　a　relatively　new　concept,　we　seek　to　understand　the　hot　topics　in　DevOps　and　the　challenges　encountered　so　far.　We　use　data　from　Stack　Overflow　(SO),　the　largest　developer　question-and-answer　platform,　to　understand　the　interests　and　difficulties　of　DevOps.　First,　we　collected　all　DevOps-related　posts　from　2009　to　2022　based　on　SO　tags.　Then　we　used　the　Latent　Dirichlet　Allocation　model　to　identify　topics,　and　manually　analyzed　time　trends　and　hot　topics.　The　results　indicate　that:　(1)　DevOps-related　issues　can　be　divided　into　four　categories:　Container,　Pipeline,　Configuration,　and　Deployment;　(2)　The　issues　that　get　more　attention　are　DevOps　foundation　issues,　cloud　deployment　failure　issues,　Kubernetes　technology　usage　issues,　and　DevOps　complex　environment　issues,　while　the　most　difficult　issues　to　solve　are　CI/CD-related　issues;　(3)　DevOps　has　been　introduced　since　2009　and　the　number　of　questions　on　the　SO　platform　is　growing,　especially　between　2014　and　2020;　(4)　The　percentage　of　DevOps-related　questions　with　no　accepted　answers　on　the　SO　platform　reached　56.3%.　Our　results　show　that　problems　are　evident　in　terms　of　complex　environments　and　the　lack　of　experts.　Also,　developers　need　to　pay　more　attention　to　basic　theoretical　knowledge　when　they　are　new　to　DevOps.　©　2023　IEEE.