Part 1: Golang and HTTP/2 issue; no Sentry for old Symfony; RabbitMQ and a third-party proxy; the power of a GIN index in PgSQL; caching S3 with NGINX; analyzing Google User Content during DDoS.
Part 2: Kafka and Docker variables in Kubernetes; 100 bytes that led ClickHouse to a disaster; one overheated K8s; ode to PostgreSQL’s pg_repack.
Part 3: Linux server migration; getting to know the ClickHouse Kubernetes operator; accelerating the data recovery in a broken PgSQL replica; a CockroachDB upgrade that went wrong.
Part 4: Package troubles in CentOS 6; sudden DNS modification and Ingress; Elasticsearch shards charade; restoring a PostgreSQL table; story of one missing pod.