Administration

• Kubernetes
  • Certificate renewal
  • How to restart a machine that is part of a Kubernetes cluster?
  • Upgrading a Kubernetes cluster
  • Troubleshooting problems arising after kubernetes cluster upgrades
• Backup and disaster recovery
  • Introduction
  • Backing up
  • Recovery procedure
• Cassandra
  • Check the health of a Cassandra node
  • How to inspect tables and data manually
  • How to rolling-restart a cassandra cluster
• Elasticsearch
  • How to rolling-restart an elasticsearch cluster
  • How to manually look into what is stored in elasticsearch
  • Check the health of an elasticsearch node
  • Check cluster health
  • List cluster nodes
  • Troubleshooting
• Etcd
  • How to see cluster health
  • How to inspect tables and data manually
  • How to rolling-restart an etcd cluster
  • Backing up and restoring
  • Troubleshooting
• General - Linux
  • Which ports and network interface is my process running on?
  • How can I see if my TLS certificates are configured the way I expect?
  • How can I see if my TLS certificates are configured the way I expect (special case kubernetes from a kubernetes machine)
• Minio
  • Should you be using minio?
  • Setting up interaction with Minio
  • Minio maintenance
  • Rotate root credentials
  • Check the health of a MinIO node
• Operational procedures
  • Reboot procedures
  • Health checks
  • Draining pods from a node for maintainance
  • Understand release tags
• Restund (TURN)
  • Wire-Server Configuration
  • How to see how many people are currently connected to the restund server
  • How to restart restund (with downtime)
  • Rebooting a Restund node
  • How to restart restund without having downtime
  • How to renew a certificate for restund
  • How to check which restund/TURN servers will be used by clients
• Investigative tasks (e.g. searching for users as server admin)
  • Manually searching for users in cassandra
  • Deleting a user which is not a team user
  • Searching and deleting users with no team
  • Manual search on elasticsearch (via brig, recommended)
  • How to manually search for a user on elasticsearh directly (not recommended)
  • How to manually delete a user from elasticsearch only
  • Mass-invite users to a team
  • How to obtain logs from an Android client to investigate issues
  • How to obtain logs from an iOS client to investigate issues
  • How to retrieve metric values manually
  • Reset session cookies
  • Identify all users using SSO
  • Create a team using the SCIM API