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azure-storage

**UTILITY SKILL** — Azure Storage Services: Blob, File Shares, Queue, Table, and Data Lake. Object storage, SMB shares, async messaging, NoSQL key-value, big-data analytics. Access tiers + lifecycle management. WHEN: "blob storage", "file shares", "queue storage", "table storage", "data lake", "access tiers", "lifecycle management". DO NOT USE FOR: SQL databases, Cosmos DB (use azure-prepare), Event Hubs / Service Bus messaging.

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Azure Storage Services

Services

ServiceUse WhenCLI
Blob StorageObjects, files, backups, static contentaz storage blob
File SharesSMB file shares, lift-and-shiftaz storage file
Queue StorageAsync messaging, task queuesaz storage queue
Table StorageNoSQL key-value (consider Cosmos DB)az storage table
Data LakeBig data analytics, hierarchical namespaceaz storage fs

CLI commands

# List storage accounts
az storage account list --output table

# List containers
az storage container list --account-name ACCOUNT --output table

# List blobs
az storage blob list --account-name ACCOUNT --container-name CONTAINER --output table

# Download blob
az storage blob download --account-name ACCOUNT --container-name CONTAINER --name BLOB --file LOCAL_PATH

# Upload blob
az storage blob upload --account-name ACCOUNT --container-name CONTAINER --name BLOB --file LOCAL_PATH

For deeper service docs and patterns, call mcp_azure-mcp_documentation with command: "microsoft_docs_search" and the relevant Azure Storage topic, or follow the links in Service Details.

Storage Account Tiers

TierUse CasePerformance
StandardGeneral purpose, backupMilliseconds
PremiumDatabases, high IOPSSub-millisecond

Blob Access Tiers

TierAccess FrequencyCost
HotFrequentHigher storage, lower access
CoolInfrequent (30+ days)Lower storage, higher access
ColdRare (90+ days)Lower still
ArchiveRarely (180+ days)Lowest storage, rehydration required

Redundancy Options

TypeDurabilityUse Case
LRS11 ninesDev/test, recreatable data
ZRS12 ninesRegional high availability
GRS16 ninesDisaster recovery
GZRS16 ninesBest durability

Rules

  • Use Managed Identity over shared keys — connect via DefaultAzureCredential (or equivalent SDK helper) instead of account keys or SAS where possible
  • Disable public blob access by default; use private endpoints + Entra-only access for prod data
  • Match the access tier to the access pattern — Hot for active, Cool for 30+ days, Cold for 90+ days, Archive for 180+ days (rehydration required to read)
  • Pick redundancy by RPO/RTO — LRS for dev, ZRS for regional HA, GRS/GZRS for DR
  • Apply lifecycle management to auto-tier blobs based on age and last access
  • Premium tier is for sub-millisecond latency / high-IOPS workloads; default is Standard
  • Security baseline is non-negotiable — see iac-security-baseline.md (TLS 1.2 minimum, HTTPS-only, public blob disabled, Managed Identity)
  • Out of scope: SQL / Cosmos DB (use azure-prepare), messaging via Event Hubs / Service Bus

Steps

  1. Identify the storage service for the workload — see Services (Blob / File / Queue / Table / Data Lake)
  2. Choose redundancy — LRS / ZRS / GRS / GZRS based on RPO/RTO requirements
  3. Choose access tier — Hot / Cool / Cold / Archive based on expected access frequency
  4. Apply security baseline — see iac-security-baseline.md (HTTPS-only, TLS 1.2, public blob disabled, Managed Identity)
  5. Run routine operations via az storage CLI — see CLI commands
  6. Wire lifecycle management for long-lived data to auto-tier and reduce cost

Service Details

For deep documentation on specific services:

SDK Quick References

For building applications with Azure Storage SDKs, see the condensed guides:

For full package listing across all languages, see SDK Usage Guide.

Azure SDKs

For building applications that interact with Azure Storage programmatically, Azure provides SDK packages in multiple languages (.NET, Java, JavaScript, Python, Go, Rust). See SDK Usage Guide for package names, installation commands, and quick start examples.

Reference Index

Load these on demand — do NOT read all at once:

ReferenceWhen to Load
references/auth-best-practices.mdAuth Best Practices
references/sdk-usage.mdSdk Usage
Repository
jonathan-vella/azure-agentic-infraops
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