5 common k8s failures and how to fix 🛠️ them

𝟭) 𝗜𝗺𝗮𝗴𝗲-𝗽𝘂𝗹𝗹 𝗯𝗮𝗰𝗸 𝗼𝗳𝗳

Check for 𝙄𝙢𝙖𝙜𝙚 𝙥𝙪𝙡𝙡 𝙥𝙤𝙡𝙞𝙘𝙮,𝙥𝙚𝙧𝙢𝙞𝙨𝙨𝙞𝙤𝙣 𝙩𝙤 𝙥𝙪𝙡𝙡 𝙛𝙧𝙤𝙢 𝙧𝙚𝙥𝙤𝙨𝙞𝙩𝙤𝙧𝙮,𝙘𝙤𝙧𝙧𝙚𝙘𝙩 𝙞𝙢𝙖𝙜𝙚 𝙣𝙖𝙢𝙚 𝙖𝙡𝙤𝙣𝙜 𝙬𝙞𝙩𝙝 𝙩𝙖𝙜.

𝙐𝙨𝙚𝙛𝙪𝙡 𝙘𝙤𝙢𝙢𝙖𝙣𝙙𝙨

Kubectl describe po
Kubectl get po
Kubectl apply -f

2) 𝘾𝙧𝙖𝙨𝙝-𝙇𝙤𝙤𝙥 𝙗𝙖𝙘𝙠 𝙤𝙛𝙛

Check for 𝘾𝙤𝙧𝙧𝙚𝙘𝙩 𝙞𝙢𝙖𝙜𝙚 𝙣𝙖𝙢𝙚 𝙖𝙡𝙤𝙣𝙜 𝙬𝙞𝙩𝙝 𝙩𝙖𝙜,𝙚𝙣𝙤𝙪𝙜𝙝 𝙧𝙚𝙨𝙤𝙪𝙧𝙘𝙚 𝙘𝙤𝙣𝙨𝙩𝙧𝙖𝙞𝙣𝙩𝙨,𝙢𝙞𝙨𝙘𝙤𝙣𝙛𝙞𝙜𝙪𝙧𝙖𝙩𝙞𝙤𝙣 𝙤𝙛 𝙚𝙣𝙫𝙞𝙧𝙤𝙣𝙢𝙚𝙣𝙩 𝙫𝙖𝙧𝙞𝙖𝙗𝙡𝙚𝙨,𝙖𝙥𝙥𝙡𝙞𝙘𝙖𝙩𝙞𝙤𝙣 𝙛𝙖𝙞𝙡𝙪𝙧𝙚 𝙗𝙚𝙘𝙖𝙪𝙨𝙚 𝙤𝙛 (𝙛𝙖𝙞𝙡 𝙩𝙤 𝙗𝙪𝙞𝙡𝙙 𝙟𝙖𝙧 𝙛𝙞𝙡𝙚𝙨,𝙞𝙨𝙨𝙪𝙚𝙨 𝙬𝙝𝙞𝙡𝙚 𝙗𝙪𝙞𝙡𝙙𝙞𝙣𝙜 𝙙𝙤𝙘𝙠𝙚𝙧 𝙞𝙢𝙖𝙜𝙚.

𝙐𝙨𝙚𝙛𝙪𝙡 𝙘𝙤𝙢𝙢𝙖𝙣𝙙𝙨

Kubectl describe po
Kubectl logs
Also to check if enough resources are allocated (memory)

3) 𝙁𝙖𝙞𝙡𝙪𝙧𝙚 𝙬𝙞𝙩𝙝 𝙀𝙭𝙞𝙩 𝙘𝙤𝙙𝙚 1

Check for 𝘼𝙥𝙥𝙡𝙞𝙘𝙖𝙩𝙞𝙤𝙣 𝙘𝙤𝙙𝙚 𝙘𝙧𝙖𝙨𝙝𝙚𝙨,𝙞𝙣𝙘𝙤𝙧𝙧𝙚𝙘𝙩 𝙚𝙣𝙫𝙞𝙧𝙤𝙣𝙢𝙚𝙣𝙩 𝙫𝙖𝙧𝙞𝙖𝙗𝙡𝙚𝙨,𝙞𝙣𝙨𝙪𝙛𝙛𝙞𝙘𝙞𝙚𝙣𝙩 𝙛𝙞𝙡𝙚 𝙥𝙚𝙧𝙢𝙞𝙨𝙨𝙞𝙤𝙣𝙨.

𝙐𝙨𝙚𝙛𝙪𝙡 𝙘𝙤𝙢𝙢𝙖𝙣𝙙𝙨
Kubectl logs
Kubectl get po
Kubectl apply -f
Lookout for any exceptions in logs /missing variables at the code level as well.

4) 𝙁𝙖𝙞𝙡𝙪𝙧𝙚 𝙬𝙞𝙩𝙝 𝙀𝙭𝙞𝙩 𝙘𝙤𝙙𝙚125

Check for 𝙞𝙣𝙘𝙤𝙧𝙧𝙚𝙘𝙩 𝙛𝙞𝙡𝙚 𝙥𝙚𝙧𝙢𝙞𝙨𝙨𝙞𝙤𝙣𝙨,𝙚𝙭𝙘𝙚𝙥𝙩𝙞𝙤𝙣𝙨 𝙙𝙪𝙧𝙞𝙣𝙜 𝙗𝙤𝙤𝙩𝙞𝙣𝙜 𝙪𝙥 𝙤𝙛 𝙥𝙤𝙙

𝙐𝙨𝙚𝙛𝙪𝙡 𝙘𝙤𝙢𝙢𝙖𝙣𝙙𝙨

Kubectl logs
Kubectl describe po

5) 𝙋𝙤𝙙/𝙉𝙤𝙙𝙚 𝙉𝙤𝙩 𝙍𝙚𝙖𝙙𝙮

Check for 𝙉𝙚𝙩𝙬𝙤𝙧𝙠 𝘾𝙤𝙣𝙣𝙚𝙘𝙩𝙞𝙫𝙞𝙩𝙮,𝙚𝙣𝙤𝙪𝙜𝙝 𝙧𝙚𝙨𝙤𝙪𝙧𝙘𝙚 𝙖𝙡𝙡𝙤𝙘𝙖𝙩𝙞𝙤𝙣,𝙪𝙣𝙝𝙚𝙖𝙡𝙩𝙝𝙮 𝙥𝙧𝙤𝙘𝙚𝙨𝙨𝙚𝙨

𝙐𝙨𝙚𝙛𝙪𝙡 𝙘𝙤𝙢𝙢𝙖𝙣𝙙𝙨
Kubectl logs
Kubectl get po and checks for its state
Increase system resource usage