Master OCI IAM policy syntax, common policy patterns, and API key management.
Use when writing IAM policies, granting access to compartments, or managing API keys.
Trigger with "oraclecloud security basics", "oci iam policy", "oci policy syntax", "oci api key setup".
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Master OCI IAM policy syntax, common policy patterns, and API key management.
Use when writing IAM policies, granting access to compartments, or managing API keys.
Trigger with "oraclecloud security basics", "oci iam policy", "oci policy syntax", "oci api key setup".
allowed-tools
Read, Write, Edit, Bash(pip:*), Bash(oci:*), Grep
version
1.7.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
["saas","oraclecloud","oci"]
compatibility
Designed for Claude Code
Oracle Cloud Security Basics
Overview
OCI IAM policy syntax (Allow group X to manage Y in compartment Z) is the number one enterprise complaint. One wrong policy locks you out of your own resources. One missing verb and your automation silently fails with a 404 NotAuthorizedOrNotFound that looks like a missing resource. This skill is the IAM policy cheat sheet with tested patterns for common access scenarios.
Purpose: Write correct IAM policies, manage API keys securely, and understand the OCI permission model.
Prerequisites
OCI Python SDK — pip install oci
OCI config file at ~/.oci/config with valid credentials (user, fingerprint, tenancy, region, key_file)
Tenancy administrator access (to create policies) or membership in a group with manage policies permission
Python 3.8+
Instructions
Step 1: Understand the Policy Verb Hierarchy
OCI uses four verbs in ascending order of privilege. Each higher verb includes all lower verbs:
Verb
Capabilities
Typical Use Case
inspect
List resources, get metadata only
Auditors, read-only dashboards
read
Inspect + get full resource details/contents
Monitoring tools, reporting
use
Read + act on existing resources (start/stop, attach)
Developers, operators
manage
Use + create, delete, move resources
Admins, automation service accounts
Critical:use does NOT include create or delete. This trips up every new OCI team.
Step 2: IAM Policy Syntax
Every OCI policy statement follows this exact structure:
Allow <subject> to <verb> <resource-type> in <location> [where <conditions>]
Important: OCI returns 404 NotAuthorizedOrNotFound for both "resource doesn't exist" and "you don't have permission." Always check IAM policies first.
Examples
List all policies in a compartment:
import oci
config = oci.config.from_file("~/.oci/config")
identity = oci.identity.IdentityClient(config)
policies = identity.list_policies(compartment_id=config["tenancy"]).data
for p in policies:
print(f"\n{p.name}:")
for stmt in p.statements:
print(f" {stmt}")
Quick policy validation via CLI:
# List all policies in the tenancy root
oci iam policy list --compartment-id <tenancy-ocid> --all
# Check what a specific group can do
oci iam policy list --compartment-id <tenancy-ocid> --all \
| python3 -c "import sys,json; [print(s) for p in json.load(sys.stdin)['data'] for s in p['statements'] if 'DevOps' in s]"
After IAM policies are in place, see oraclecloud-enterprise-rbac for compartment hierarchy design and dynamic groups, or oraclecloud-multi-env-setup for profile-based environment separation.
