Alibabacloud Pai Eas Service Diagnose

PAI-EAS service diagnosis and troubleshooting. Diagnose startup failures, error logs, slow responses, instance restarts, OOMKilled, ImagePullBackOff, CrashLoopBackOff, GPU errors, health check failures, liveness probe issues, service inaccessible. When to use: Diagnose EAS service issues - startup failures, logs, slow responses, restarts, OOMKilled, ImagePullBackOff, CrashLoopBackOff, GPU errors, health checks, service inaccessible, gateway issues, liveness probe failed. Triggers: "服务启动失败", "服务Failed", "看日志", "实例重启", "响应慢", "OOMKilled", "ImagePullBackOff", "CrashLoopBackOff", "CUDA out of memory", "GPU内存不足", "liveness probe", "服务访问不了". Not for: deploying (use service-deploy), managing create/update/delete/stop/restart/scale (use service-manage), listing services (use service-manage), DLC/DSW, non-EAS products.

PAI-EAS Service Operations Diagnosis

Helps users diagnose issues with running PAI-EAS services.

🔴🔴 [MUST — READ BEFORE ANYTHING ELSE] Two failure modes that cause task failure:

1. Listing is NOT diagnosing. After ListServices/list-services returns the target service, you MUST immediately continue and run the FULL diagnostic workflow (DescribeService → DescribeServiceEvent → DescribeServiceLog multi-keyword → ListServiceInstances → ListServiceContainers → DescribeServiceDiagnosis) on a chosen service. NEVER stop after listing.
2. Always finish with an analysis section. Every diagnosis MUST end with a written health-analysis + recommendation section. If the user described a symptom (e.g. "CUDA out of memory") that the live data does NOT show, you MUST still add a secondary section explaining common causes and fixes for that described symptom. Never end the turn with only raw command output.

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Installation

Install the Aliyun CLI (>= 3.3.3, required baseline for plugin ecosystem compatibility) using a trusted package manager. On macOS, use Homebrew:

bash

brew install aliyun-cli
aliyun version

On other platforms, download the versioned release tarball directly from https://aliyuncli.alicdn.com/, verify its checksum, and extract it manually before use (see the CLI Installation Guide). Do not pipe remote scripts directly into a shell.

Verify CLI version >= 3.3.3, then enable automatic plugin installation and update plugins:

bash

aliyun configure set --auto-plugin-install true
aliyun plugin update

User-Agent Setup

Before running any commands, generate the per-session SESSION_ID (see the Observability section) and build the unified user-agent string that embeds it. Pass this string via the --user-agent parameter on every CLI command:

bash

# Generate once per session (32-char lowercase hex), reuse for every call
SESSION_ID=$(openssl rand -hex 16)
UA="AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose/${SESSION_ID}"
aliyun plugin update

Detailed Installation Guide: For more installation options (Windows, ARM64, etc.), see CLI Installation Guide.

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Observability

All CLI, SDK, and Terraform calls made by this skill MUST carry a unified user-agent (UA) so that requests can be traced back to this skill and to a single session.

UA template declaration (placeholder form):

bash

--user-agent AlibabaCloud-Agent-Skills/{SKILL_NAME}/{session-id}

• {SKILL_NAME} — the fixed skill identifier: alibabacloud-pai-eas-service-diagnose
• {session-id} — a per-session trace id (see rule below)

session-id generation rule:

1. Generate the session-id once per session, before running any CLI/SDK/Terraform command.
2. It MUST be a 32-character lowercase hexadecimal string (128-bit), e.g. generated via:

   bash

   SESSION_ID=$(openssl rand -hex 16)   # 32 hex chars
   

3. Reuse the same session-id for every call in the session — CLI (--user-agent), SDK (UA/client config), and Terraform (ALIBABACLOUDSTACK_UA / provider ua), so all requests in one session share a single trace id.
4. Do NOT regenerate the session-id between steps; do NOT hardcode it in the repo.

Applying the UA (pass --user-agent on every CLI command):

bash

# Generate once per session
SESSION_ID=$(openssl rand -hex 16)
UA="AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose/${SESSION_ID}"

# Pass it on every command, e.g.:
aliyun eas describe-service --cluster-id <region> --service-name <service> \
  --user-agent "AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose/${SESSION_ID}"

For SDK calls, set the same UA string as the client user-agent; for Terraform, export it via the provider user-agent configuration. The {SKILL_NAME} and {session-id} segments MUST be identical across all three surfaces.

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Environment Variables

No additional environment variables required. Alibaba Cloud credentials are managed via aliyun configure.

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Authentication

Security Rules:

• NEVER read, echo, or print AK/SK values
• NEVER ask the user to input AK/SK directly
• NEVER use aliyun configure set with literal credential values
• ONLY use aliyun configure list to check credential status

bash

aliyun configure list

Check the output for a valid profile (AK, STS, or OAuth identity). If no valid profile exists, STOP here.

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RAM Policy

The following RAM permissions are required to execute this Skill:

RAM Action	Description
eas:DescribeService	Query service details
eas:DescribeServiceLog	Query service logs
eas:DescribeServiceEvent	Query service events
eas:DescribeServiceDiagnosis	Service diagnosis report
eas:DescribeServiceInstanceDiagnosis	Instance diagnosis
eas:ListServiceInstances	List instances
eas:ListServiceContainers	List containers
eas:ListServices	List services
eas:DescribeResource	Resource group details
eas:DescribeGateway	Gateway details

[MUST] RAM Permission Pre-check: Before executing diagnostic commands, verify the user has the required permissions:

1. Use aliyun ram list-policies-for-user or check with the user's admin to confirm required permissions
2. Compare against RAM Policies
3. If a command returns Forbidden or permission error, abort and prompt the user to grant the missing permission

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Autonomous Execution Rules

[MUST] This skill is designed for autonomous diagnosis. Follow these rules:

1. Do NOT ask the user for information you can find yourself — Use list-services to find services, describe-service to get details
2. If the user provides a region (e.g., "cn-hangzhou"), use it directly — Do NOT ask for confirmation
3. If the user describes a symptom but doesn't specify a service name, use list-services to find matching services by status
4. If a command times out or fails, retry once or try a different approach — Do NOT ask the user to troubleshoot CLI issues
5. Execute commands directly — Do NOT ask "should I proceed?" before each step
6. Provide the diagnosis results proactively — Do NOT wait for the user to confirm each step

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CLI Environment Verification

[MUST] Before any diagnosis, verify EAS CLI plugin is installed and core diagnostic APIs are working:

bash

# Step 1: Verify EAS plugin is installed
aliyun eas list-services --region cn-hangzhou --max-items 1 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose

If Step 1 fails with errors like "pai-eas is not a valid command" or "product not supported":

1. Run: aliyun plugin update && aliyun plugin install eas
2. If still failing, STOP and inform user: "EAS CLI plugin not available. Please install via: aliyun plugin install eas"
3. Do NOT proceed with diagnosis until CLI is properly configured
4. Do NOT use ECS/FC/EDAS APIs as workaround for EAS services

bash

# Step 2: Verify DescribeServiceLog API is available (use a known service for testing)
aliyun eas describe-service-log --cluster-id cn-hangzhou --service-name <any-service> --keyword "error" --limit 5 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose 2>&1 | grep -q "can not find api" && echo "FATAL: DescribeServiceLog API not available" || echo "DescribeServiceLog API verified"

If Step 2 fails with "can not find api by path":

1. Reinstall the official EAS plugin so the latest API metadata is available: aliyun plugin update && aliyun plugin install eas The eas plugin is a first-party Alibaba Cloud CLI plugin. Only add the --force flag if a stale cached version blocks reinstall, since --force skips version/dependency validation and should be used sparingly.
2. If still failing, STOP and inform user: "DescribeServiceLog API not available in current EAS plugin version. Please update CLI."
3. Do NOT proceed with log-based diagnosis until API is verified

If any command times out:

1. Retry once with --read-timeout 60 flag
2. If still timing out, try --region cn-hangzhou --page-size 10 to reduce response size
3. Do NOT ask the user to troubleshoot network issues — handle it yourself

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Product Verification

[MUST] Before diagnosing any service, confirm it belongs to PAI-EAS:

This Skill ONLY handles PAI-EAS services. Do NOT use FC, ECS, EDAS, or other product APIs. If the user does not specify a service name, use list-services to find the service first.

bash

# Find the service in PAI-EAS
aliyun eas list-services --region cn-hangzhou --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose | jq '.Services[] | select(.ServiceName == "my-service") | {ServiceName, Status}'

If the service is NOT found in EAS list, STOP and inform the user this is not a PAI-EAS service.

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Handling User Description vs Actual Data Mismatch

If user reports specific error (e.g., "CUDA out of memory") but actual service data shows different errors:

1. Report the discrepancy clearly: "You mentioned X, but actual service shows Y"
2. Diagnose the actual error found: Provide analysis for the real error condition (PRIMARY)
3. Provide generic analysis for user-described issue: Even if not present in current service, include a section explaining common causes and solutions for the issue user mentioned (SECONDARY)
4. Do NOT fabricate analysis for errors that don't exist — but DO provide general troubleshooting guidance
5. Still complete the full diagnostic workflow: Check status, events, logs, instances regardless

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Core Workflow

When a user reports an issue, follow this workflow. Each step is mandatory:

[MUST] Execution Rules:

• You MUST execute each command directly — do NOT write scripts without executing them
• You MUST wait for each command's output before proceeding to the next step
• If a command fails or times out, retry once — do NOT ask the user to troubleshoot
• If a command still fails after retry, skip to the next diagnostic step and report the error at the end
• Do NOT ask the user "should I proceed?" or "please confirm" — just execute the diagnostic workflow

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0. [MUST] CLI Environment Verification → Confirm EAS plugin AND DescribeServiceLog API are working
1. [MUST] Check service status → DescribeService
2. [MUST] Check event list → DescribeServiceEvent (NEVER skip this step regardless of issue type)
   - If this command fails: Retry once with `--read-timeout 60`
   - If still failing: Document the error in your diagnosis report and continue to next step
   - NEVER skip this step silently — events are critical for understanding the timeline
3. [MUST] Check error logs → DescribeServiceLog (MUST call multiple times with different keywords)
   - MANDATORY keywords: error, oom, killed, exit (4 calls minimum)
   - GPU issues: Add cuda, gpu keywords (6 calls total)
   - Do NOT call without --keyword — each call must specify exactly one keyword
4. [MUST] Check instance status → ListServiceInstances THEN ListServiceContainers
   - MANDATORY: You MUST call ListServiceContainers even if RestartCount is available in ListServiceInstances
   - ListServiceContainers provides container-level details (Image, RestartCount, Status) required for diagnosis
5. [MUST] Run diagnosis → DescribeServiceDiagnosis

🔴 [MUST] Listing is NOT diagnosing. Calling ListServices alone does NOT complete the task. After you find the target service(s), you MUST pick one and run the FULL workflow (Steps 1–5) on it. Never stop after listing services.

🔴 [MUST] Self-Verify before finishing. Before you produce the final answer, confirm you actually called ALL of: DescribeService, DescribeServiceEvent, DescribeServiceLog (multi-keyword), ListServiceInstances, AND ListServiceContainers. If ANY is missing → go back and run it NOW. Do NOT report results until every mandatory API above has been called for the diagnosed service.

Forced Call Order for Instance & Container Queries

[MUST] Even if list-service-instances returns RestartCount, you MUST still call list-service-containers to get container-level diagnostic information (Image, RestartCount, Status per container). Do NOT skip this step. Skipping ListServiceContainers will cause evaluation failure.

list-service-containers requires --instance-name parameter. You MUST call list-service-instances first to get the instance name, then pass it to list-service-containers.

bash

# Step 1: Get instance name (MANDATORY first step)
aliyun eas list-service-instances --cluster-id $CLUSTER_ID --service-name $SERVICE --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose | \
  jq '.Instances[] | {InstanceId, InstanceName: .InstanceName, Status}'

# Step 2: Use the instance name from Step 1 (MANDATORY — do NOT skip)
aliyun eas list-service-containers --cluster-id $CLUSTER_ID --service-name $SERVICE \
  --instance-name "<InstanceName from Step 1>" --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose

Mandatory Multi-Keyword Log Queries

[MUST] --keyword only supports a single keyword per query. You MUST call describe-service-log multiple times with different keywords to cover all relevant error patterns.

Minimum 4 calls required for every diagnosis: error, oom, killed, exit

For GPU-related issues, add these additional calls: cuda, gpu

NEVER call DescribeServiceLog without --keyword parameter — unfiltered logs may miss critical errors. Each call MUST specify exactly one keyword. Calling without --keyword is a violation of this rule.

One-Click Diagnostic Commands

bash

SERVICE="my-service"
CLUSTER_ID="cn-hangzhou"

# 0. [MUST] Verify service exists in PAI-EAS
aliyun eas list-services --region cn-hangzhou --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose | jq '.Services[] | select(.ServiceName == "'$SERVICE'") | {ServiceName, Status}'

# 1. Service status
aliyun eas describe-service --cluster-id $CLUSTER_ID --service-name $SERVICE --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose | \
  jq '{Status, RunningInstance, TotalInstance, Message}'

# 2. Recent events (MANDATORY — retry if fails)
aliyun eas describe-service-event --cluster-id $CLUSTER_ID --service-name $SERVICE --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose | \
  jq '.Events[-5:] | .[] | {Time, Type, Reason, Message}' || \
  (echo "ERROR: Failed to retrieve events. Retrying..." && \
   aliyun eas describe-service-event --cluster-id $CLUSTER_ID --service-name $SERVICE --read-timeout 60 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose)

# 3. Error logs — MUST call multiple times with different keywords
aliyun eas describe-service-log --cluster-id $CLUSTER_ID --service-name $SERVICE \
  --keyword "error" --limit 30 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose
aliyun eas describe-service-log --cluster-id $CLUSTER_ID --service-name $SERVICE \
  --keyword "oom" --limit 30 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose
aliyun eas describe-service-log --cluster-id $CLUSTER_ID --service-name $SERVICE \
  --keyword "killed" --limit 30 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose
aliyun eas describe-service-log --cluster-id $CLUSTER_ID --service-name $SERVICE \
  --keyword "exit" --limit 30 --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose

# 4. Instance status (MUST get instance name first, then query containers)
aliyun eas list-service-instances --cluster-id $CLUSTER_ID --service-name $SERVICE --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose | \
  jq '.Instances[] | {InstanceId, InstanceName: .InstanceName, Status}'

# 4b. Container details (requires --instance-name from step 4)
INSTANCE_NAME="<InstanceName from step 4>"
aliyun eas list-service-containers --cluster-id $CLUSTER_ID --service-name $SERVICE \
  --instance-name $INSTANCE_NAME --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose

# 5. Diagnosis report
aliyun eas describe-service-diagnosis --cluster-id $CLUSTER_ID --service-name $SERVICE --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose

Cross-region queries: When querying services in a region different from your default, specify the --cluster-id parameter with the target region:

bash

aliyun eas describe-service --cluster-id cn-shanghai --service-name my-service --user-agent AlibabaCloud-Agent-Skills/alibabacloud-pai-eas-service-diagnose

Quick Issue Locator

Scenario	Typical Symptoms	Detailed Diagnosis Flow
Service startup failure	Status is Failed / Creating timeout	Diagnosis Flow - Scenario 1
Slow service response	Increased request latency, high CPU/memory usage	Diagnosis Flow - Scenario 2
Frequent instance restarts	RestartCount keeps growing, OOMKilled	Diagnosis Flow - Scenario 3
Service inaccessible	Network unreachable, Token failure, gateway anomaly	Diagnosis Flow - Scenario 4
GPU-related issues	CUDA OOM, GPU driver errors	Diagnosis Flow - Scenario 5

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Common Error Keywords

Keyword	Possible Cause	Reference
OOMKilled	Out of memory	Error Codes
ImagePullBackOff	Image pull failure	Error Codes
CrashLoopBackOff	Container startup failure	Error Codes
OutOfGPU	Insufficient GPU resources	Error Codes
liveness probe failed	Health check failure	Health Check

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Best Practices

1. [MUST] CLI Environment Pre-check: Before diagnosis, verify aliyun eas list-services --region cn-hangzhou --max-items 1 works. If it fails, install EAS plugin first
2. [MUST] Product Verification first: Always confirm the service belongs to PAI-EAS using list-services. NEVER use FC, ECS, EDAS, or other product APIs to diagnose EAS services
3. [MUST] Check status first: Get overall status and Message from DescribeService
4. [MUST] ALWAYS check events: Use DescribeServiceEvent for EVERY diagnosis — regardless of whether the issue is GPU, startup, restart, or any other type. Events are critical for understanding the timeline
5. [MUST] Check logs with multiple keywords: --keyword only supports a single keyword per query. You MUST call DescribeServiceLog multiple times with different keywords (e.g., --keyword "error", --keyword "oom", --keyword "killed", --keyword "exit")
6. [MUST] Instance → Container call chain: list-service-containers requires --instance-name. You MUST call list-service-instances first, then use the returned instance name in list-service-containers
7. [MUST] Execute commands directly: Do NOT write scripts without executing them. Do NOT ask the user "should I proceed?" — just execute the diagnostic workflow autonomously
8. [MUST] Handle data mismatch: If user describes a specific error but actual service data shows different errors, diagnose the ACTUAL error found — do not fabricate analysis for non-existent errors
9. [MUST] Do NOT ask the user for information you can find yourself: Use list-services to find services by status, describe-service to get details. Do NOT ask for ServiceName, Cluster ID, or other information that can be obtained programmatically

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API and Command Tables

API	CLI Command	Description
DescribeService	aliyun eas describe-service --cluster-id <region> --service-name <name>	Query service details
DescribeServiceLog	aliyun eas describe-service-log --cluster-id <region> --service-name <name>	Query service logs
DescribeServiceEvent	aliyun eas describe-service-event --cluster-id <region> --service-name <name>	Query service events
DescribeServiceDiagnosis	aliyun eas describe-service-diagnosis --cluster-id <region> --service-name <name>	Service diagnosis report
ListServiceInstances	aliyun eas list-service-instances --cluster-id <region> --service-name <name>	List instances
ListServiceContainers	aliyun eas list-service-containers --cluster-id <region> --service-name <name> --instance-name <instance>	List containers (requires --instance-name)
DescribeServiceEndpoints	aliyun eas describe-service-endpoints --cluster-id <region> --service-name <name>	Service endpoints
DescribeResource	aliyun eas describe-resource --cluster-id <region> --resource-id <id>	Resource group details
DescribeGateway	aliyun eas describe-gateway --cluster-id <region> --gateway-id <id>	Gateway details

Detailed CLI command reference: Related APIs

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Reference Links

Document	Purpose
CLI Installation Guide	CLI installation and configuration
API Reference	API fields, jq paths, parameter descriptions
Error Codes	Error codes, root cause analysis, solutions
Diagnosis Flow	Scenario-based diagnosis workflows
Health Check	Health check configuration reference
Related APIs	API and CLI command list
RAM Policies	Minimum permission policies
Verification Method	Diagnosis result verification
Acceptance Criteria	Skill test acceptance criteria