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Troubleshooting

Kubernetes

If pods are not getting deployed

kubectl get events -n <namespace>

kubectl describe po/fid-0 -n <namespace>

Check if zookeeper is up and running

kubectl exec -it zookeeper-0 -n <namespace> -- bash -c "export JAVA_HOME=/opt/radiantone/rli-zookeeper-external/jdk/jre/;/opt/radiantone/rli-zookeeper-external/zookeeper/bin/zkServer.sh status"

Exec into an fid/zk container

kubectl exec -it zookeeper-0 -n <namespace> -- /bin/bash

kubectl exec -it fid-0 -n <namespace> -- /bin/bash

Run cluster.sh command

kubectl exec -it fid-0 -n <namespace> -- cluster.sh list

List java processes

kubectl exec -it fid-0 -n <namespace> -- /opt/radiantone/vds/jdk/bin/jps -lv

Get kubernetes context

kubectl config get-contexts

Docker

Logs

docker logs [options] <container name>

Options Available

  • --details includes additional attributes to the log output, such as environment variables.
  • --follow or -f shows new log output as the container runs.
  • --since shows the log entries after the desired timestamp.
  • --tail or -n shows some number (n) of lines from the end (tail) of the log.
  • --timestamp or -t shows the log output for the desired point in time.
  • --until shows all log entries until the desired timestamp.

Docker Process Status

The docker process status command shows running containers 

docker ps

To view all the running containers

docker ps -a

Docker Remove

When you want to completely remove a container, you use the docker rm command

docker rm <container_name>

Docker Inspect

  • The Docker inspect command returns an assortment of detailed Docker container information.
  • The information can include the container state, network port mappings, environment variable values and path to history log files
docker inspect [options] <container 1 name or ID> <container 2 name or ID…>

Docker Info

  • Docker info command output may provide details that include the number of running, paused and stopped containers; number of available images; what storage driver is in use; storage use and availability metrics; specifics for plugins, OS and the kernel; CPU and memory details; the current Docker server version; and execution and logging drivers in use.
docker info [options]

Docker Stats

  • The stats command automatically streams usage data for all running containers. Admins can declutter this information by using options and specifying desired container names
docker stats [options] <container 1 name> <container 2 name…>

Docker Events

  • The Docker events command enables admins to see up to 1,000 server-based events in real time
docker events [options]

Docker exec

  • The Docker exec command enables admins to execute new commands within the default directory of a running container. For exec to function, the command must be executable, and admins must run the target container
docker exec [options] <container command> <command arguments>

Docker-Compose

To get the usage of docker-compose command run the command below

docker-compose -h

Docker-Compose Process Status

To check the state of all the containers

docker-compose ps

NOTE : Run the docker-compose from the location of docker-compose.yaml file

Docker-Compose Logs

To inpsect the logs and find any errors

docker-compose logs --follow

Docker-Compose Events

Receive real time events from containers

docker-compose events