Gano kurakurai arzikoki masu fakiti ya haɗa da nisa loguna, samun shell cikin arzikoki, bincika saita da yanayin, da gano matsaloli na yau da kullun (rushe, sadarwa, albarkatu). Sanin yadda za ka gano kurakurai shine mahimman sanin aiki.
docker ps -a
docker logs <container>
docker logs -f -- 100 <container>
docker inspect <container>
docker events
docker logs shine yawanci mataki na farko — yana nuna fitarwa da kurakurai na aikacin. docker ps -a yana nuna idan arziki ya tashi (da alamar fitarwa).
# run an interactive shell inside a RUNNING container to investigate
docker exec -it <container> bash # or sh (alpine)
# → inspect files, run commands, check the environment, test connectivity from inside
# if the container won't STAY running, override the entrypoint to get a shell
docker run -it --entrypoint sh myimage
docker exec -it ... bash yana ba da shell cikin arziki mai aiki — ba zai dace ba na bincika fayilai, bincika yanayin, da gwaji sadarwa daga asusun arziki.
Container EXITS immediately → check `docker logs`; the main process crashed or finished
(a container stops when its main process exits) — check CMD/ENTRYPOINT, errors
CAN'T CONNECT between containers → check they're on the same network; use service NAMES
(not localhost); verify ports; `docker network inspect`
PORT not accessible → check -p mapping; the app must listen on 0.0.0.0 (not 127.0.0.1)
OUT OF MEMORY / killed → check `docker stats`, resource limits (OOMKilled in inspect)
PERMISSION errors → file ownership/user (non-root user vs mounted volume permissions)
IMAGE issues → rebuild without cache (--no-cache); check the build context/.dockerignore
Sanin yadda za ka gano kurakurai da daidaita arzikoki na Docker shine mahimman sanin aiki waqare, saboda arzikoki masu fakiti suna da matsaloli a daidai-daidai (rushe, matsaloli sadarwa, kurakurai saita) da dole su gano, kuma yanayin arziki yana ƙara matakin da ke buƙatar hanyoji gano na takaici.
Sanin tushe — nisa loguna (docker logs, yawanci mataki na farko, yana nuna fitarwa da kurakurai na aikacin), bincika yanayi (docker ps -a yana nuna idan kuma me ta sa arziki ya tashi, ciki har da alamominsa), da bincika saita/yanayi (docker inspect) — su ne yadda ka fara gano matsaloli mafi yawa.
Samun shell cikin arziki (docker exec -it ... bash) shine hanya da ba zai dace ba na bincika daga asusun arziki — bincika fayilai, bincika yanayin, da gwaji sadarwa — kuma sanin yadda za ka samun shell har ma sai da arziki bai ci gaba ba (maimaita fitarwa) yana daidaita ra'ayoyi masu wahala.
Tunani game da matsaloli na yau da kullun da gano su yana da mahimman albarka: arzikoki suna tashi nan da nan (mahimmin aiki ya rushe ko gama — bincika loguna da CMD/ENTRYPOINT), matsaloli sadarwa tsakanin arzikoki (memarbiyya sadarwa, amfani da sunaye sabis ba localhost), babin ba aka buƙata (taswira, kuma abun da aka sani ba kulle cewa aikacin dole ne ya kunna 0.0.0.0 ba 127.0.0.1), kashen ƙarfi, da kurakurai halarta — waɗannan su ne ainihi, matsaloli da sake dawowa da sanin yadda za ka gane da daidaita suna canza kalubalen lokaci.
Domin arzikoki masu fakiti suna da matsaloli da dole su gano kurakurai, kuma domin gano kurakurai waqare (loguna, exec cikin arzikoki, bincika, da gane matsaloli da feshin kaya) shine dole ne gano da warware su, sanin yadda za ka gano kurakurai arzikoki na Docker shine mahimman, matakin sai a dai aiki waqare ga kowa yana aiki da arzikoki masu fakiti, ikon kasua na mahali da ke juyar da matsaloli arziki masu haɗaɗi zuwa waɗanda za a warware.