A structured naming convention using standardized components (project, type, env, ID) is a core OCI best practice. It ensures consistency, supports automation through predictable patterns, enhances discoverability, and scales across teams and regions. Lowercase and hyphens avoid formatting issues in various systems.

When an instance is running but unreachable, the most common cause is network configuration. The first step is to validate the foundational network setup: ensuring the instance has a public IP (if needed) and that the subnet’s route table permits traffic to/from the internet via an Internet Gateway. This is a quicker and more fundamental check than OS-level diagnostics.

The ‘Cost Analysis’ tool and downloadable ‘Cost Reports’ are built-in OCI features for granular cost tracking. They allow filtering by tags (like a project tag), grouping by service or resource, and viewing usage over custom time periods. Budgets are for forecasting and alerts, not detailed historical reporting.

The principle of least privilege is key. Segmenting tiers into separate subnets and defining explicit ingress rules (e.g., only allowing port 1521 from the app tier subnet to the DB tier subnet) minimizes the attack surface. This layered security model is a fundamental OCI architectural best practice.

Object Versioning protects against overwrites and allows recovery of previous versions. WORM (Retention Rules) enforces a legal or compliance hold, preventing deletion or modification of objects for a specified period. This two-layered approach provides robust, enforcement-based protection that surpasses procedural or simple backup strategies.

Proactive cost governance involves monitoring and automation. A budget with alerts provides visibility into spending trends. To prevent waste, resources for transient projects should be tagged (e.g., ‘auto-delete:true’) and paired with an automated process (like a scheduled function or script) to terminate them after a set period. This is a practical, real-world FinOps practice.

OCI allows you to use your own keys (customer-managed keys) stored in OCI Vault for encryption. This meets the policy requirement for customer control over key lifecycle (rotation, disable, destroy). The option is available during resource creation for many services, including Block Volume. Oracle-managed keys, while secure, do not satisfy the specific policy of customer control.

Service limits (quotas) are region-specific. The error indicates the limit for total block storage GB (or number of volumes) in the US West (Phoenix) region has been reached. The correct solution is to request an increase for that specific limit in that specific region via the ‘Limits and Quotas’ page in the console. Compartment quotas are different and manage distribution within a region, not the regional cap itself.

IAM policies are defined using a verb (manage, read, use), a resource-type (autonomous-database), and a scope (compartment Prod). The statement ‘manage autonomous-database in compartment Prod’ grants the necessary permissions (including create, update, delete) for that specific service within the specified compartment, adhering to the principle of least privilege. ‘Manage all-resources’ is overly permissive.

A structured naming convention using standardized components (project, type, env, ID) is a core OCI best practice. It ensures consistency, supports automation through predictable patterns, enhances discoverability, and scales across teams and regions. Lowercase and hyphens avoid formatting issues in various systems.0