Publications by tag #troubleshooting

Renewing Let’s Encrypt root certificates for legacy CentOS, handling an error in DNS records with Ingress, restoring a PgSQL table from a backup, dealing with a tricky sharding problem in Elasticsearch, and more.

Our new exciting SRE/Ops stories include complicated Linux server migration (bare-metal to VM), large PostgreSQL replica recovery, small case with ClickHouse Kubernetes operator, and abnormal result of CockroachDB upgrade.

Our stories include a poorly prepared Kafka in Docker, an unexpected network issue for ZooKeeper & ClickHouse, a faulty hardware in the data center, and the PgSQL database optimization.

Troubleshooting & recovering the failed Rook cluster manually. Tips for preventing the disaster and restoring from backups.

When something prevents web applications from proper functioning, you have to investigate into all levels: in your infrastructure (K8s based in our case), third-party services or in the code itself.