Alibabacloud Aes Sysom Pai Diagnosis

Perform SysOM deep diagnosis on Alibaba Cloud PAI products (EAS / DLC) to identify root causes of instance-level issues. Use when users report: EAS instance anomalies, GPU OOM (out of memory), GPU memory out-of-bounds errors Slow first-token latency, uneven request scheduling across model service instances OOM (Out Of Memory), insufficient memory, processes being killed Abnormally high system load, high IO latency, network jitter, packet loss Instance crashes, unexpected restarts, kernel oops DLC training job hangs, communication timeouts, per-step throughput degradation Any issue related to EAS instance health, DLC job health, or underlying compute resource performance

Skill Name: alibabacloud-aes-sysom-pai-diagnosis Goal: Perform SysOM deep diagnosis on Alibaba Cloud PAI products (EAS / DLC) to identify root causes of instance-level performance and health issues.

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Credential Security

[CRITICAL] Credential Security Rules:

• NEVER print, echo, or display AccessKey ID / AccessKey Secret values in conversation or command output (even partial masking of LTAI_ACCESS_KEY_ID is FORBIDDEN)
• NEVER ask the user to input AK/SK directly in the conversation or command line
• 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.

1. Obtain credentials from Alibaba Cloud Console
2. Configure credentials outside of this session (via aliyun configure in terminal or environment variables in shell profile)
3. Return and re-run after aliyun configure list shows a valid profile

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RAM Policy

For the full list of RAM permissions required by this skill, see references/ram-policies.md.

[MUST] Permission Failure Handling: When any command or API call fails due to permission errors at any point during execution, follow this process:

1. Read references/ram-policies.md to get the full list of permissions required by this SKILL
2. Use ram-permission-diagnose skill to guide the user through requesting the necessary permissions
3. Pause and wait until the user confirms that the required permissions have been granted

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Parameter Confirmation

IMPORTANT: Parameter Confirmation — Before executing any command or API call, ALL user-customizable parameters (e.g., RegionId, instance IDs, product type, time ranges, etc.) MUST be confirmed with the user. Do NOT assume or use default values without explicit user approval.

Parameter	Required/Optional	Description	Default Value
region	Required	Region of the PAI resource (e.g., cn-hangzhou)	None, must be provided by user
instance	Required	PAI instance ID (EAS service ID eas-m-xxx or DLC job ID dlcxxxxxxxx)	None, must be provided by user
product	Required	PAI sub-product type, one of EAS or DLC	Auto-inferred from instance prefix (eas- → EAS, dlc → DLC); only ask user when inference fails
start_time	Optional	Diagnosis start timestamp (Unix seconds)	0 (real-time)
end_time	Optional	Diagnosis end timestamp (Unix seconds)	0
enable_diagnosis	Optional	Force real-time diagnosis (highest priority)	false
uid	Optional	Account ID owning the resource	None
ocd_description	Optional	User's problem description in English, with words joined by underscores (_). No Chinese characters, no spaces. Example: GPU_OOM_instance_restart	None

Product Auto-Inference Rule

The product field MUST be present in the params JSON. The value is determined as follows:

1. If the user explicitly specifies product (EAS or DLC), use the user value
2. Otherwise, infer from the instance prefix:
   • eas- → EAS
   • dlc (no hyphen, e.g., dlcxxxxxxxx) → DLC
3. If inference is ambiguous or fails, you MUST explicitly ask the user to choose between EAS and DLC

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Core Workflow

The workflow has two phases with 8 steps. All aliyun CLI business commands (SysOM, EAS, DLC API calls) MUST include --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis. System commands (version, configure, plugin) do NOT use --user-agent.

Phase 1: Environment Setup (Steps 0–3)

Step 0 — Enable AI-Mode and Update Plugins

Before executing any CLI commands, enable AI-Mode, set User-Agent, and update plugins:

bash

aliyun configure ai-mode enable
aliyun configure ai-mode set-user-agent --user-agent "AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis"
aliyun plugin update

⚠️ The above three commands must be executed before all CLI operations, and only need to be run once.

Step 1 — CLI Version Check

bash

aliyun version

Verify version >= 3.3.1. If not met, refer to references/cli-installation-guide.md for installation.

Step 2 — Enable Auto Plugin Installation

bash

aliyun configure set --auto-plugin-install true

Step 3 — Credential Verification

bash

aliyun configure list

If no valid credentials exist, STOP and guide the user to configure credentials outside the session.

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Phase 2: Diagnosis Execution (Steps 4–8)

For detailed workflow, see references/diagnose-workflow.md.

Step 4 — Ambiguous Problem Clarification (Inversion Gate)

Must confirm region, instance, and when the anomaly occurred. If not provided by the user, ask explicitly. product is auto-inferred from the instance prefix (eas- → EAS, dlc → DLC); only ask user when inference fails. Also extract optional time range.

⚠️ Time Inference Rule: When the user's description contains any temporal reference (e.g., "this morning", "yesterday afternoon", "around 3pm", "last night"), you MUST proactively ask for the specific time range and recommend historical diagnosis mode. Do NOT silently default to real-time diagnosis when the problem clearly occurred in the past.

Step 5 — SysOM Role Initialization

bash

aliyun sysom initial-sysom --check-only false --source aes-skills --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis

Step 6 — Resource Validation

Before invoking diagnosis, you MUST validate the resource based on the inferred product:

6A. EAS — Verify Service Exists

bash

aliyun eas list-services \
  --region <region> \
  --filter <eas_service_id> \
  --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis

From the returned Services array, verify that an entry with a matching ServiceId exists. If no match is found, inform the user that the service ID is invalid and stop the pipeline.

6B. DLC — Verify Resource Type is Lingjun

bash

aliyun pai-dlc get-job \
  --region <region> \
  --job-id <dlc_job_id> \
  --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis

Check the ResourceType field in the response:

• Lingjun → proceed to Step 7
• Any other value → STOP and inform the user: "SysOM diagnosis currently only supports DLC jobs running on Lingjun resources. Your job uses <ResourceType>, which is not yet supported."

⚠️ The instance field in params JSON uses the original instance ID directly (eas-m-xxx or dlcxxxxxxxx) — this step is purely for validation.

Step 7 — Invoke Diagnosis and Poll Results

Diagnosis Mode Decision Rules

text

if enable_diagnosis == true:
    mode = real-time diagnosis    # enable_diagnosis has highest priority
elif start_time != 0:
    mode = historical diagnosis   # time range specified, retrospective analysis
else:
    mode = real-time diagnosis    # default

• Real-time: start_time=0, end_time=0
• Historical: start_time=<unix_ts>, end_time=<unix_ts>
• Forced real-time: when enable_diagnosis=true, force start_time to 0 even if provided

Build params JSON

Use snake_case keys (consistent with SDK). Required base fields (ALL must be included):

json

{
  "instance": "<eas_service_id_or_dlc_job_id>",
  "region": "<region>",
  "product": "<EAS_or_DLC>",
  "start_time": 0,
  "end_time": 0,
  "type": "ocd",
  "ai_roadmap": true,
  "enable_sysom_link": false,
  "ocd_description": "<user_problem_description_in_english_with_underscores>"
}

⚠️ Anti-confusion Warning: "type": "ocd" and "product": "<EAS|DLC>" are BOTH REQUIRED fields inside the params JSON — do NOT omit either!

• --service-name ocd (CLI argument) → tells CLI which diagnosis service endpoint to call
• "type": "ocd" (params JSON field) → tells the diagnosis engine which diagnosis type to execute internally
• "product": "EAS" or "product": "DLC" (params JSON field) → tells the diagnosis engine which PAI sub-product to target

All three are mandatory; do NOT omit any of them.

⚠️ The instance field uses the original instance ID directly — eas-m-xxx for EAS, dlcxxxxxxxx for DLC. Do NOT convert to ServiceName or any other identifier.

Conditional fields (add only when non-empty):

• uid: account ID owning the resource (integer)
• ocd_description: user's problem description (string). Format constraints: must be in English, no Chinese characters, no spaces — use underscores (_) to join words. Example: high_latency_first_token, GPU_OOM_killed

Invoke Diagnosis

bash

aliyun sysom invoke-diagnosis \
  --service-name ocd \
  --channel ecs \
  --params '{"instance":"<eas_service_id_or_dlc_job_id>","region":"<region>","product":"<EAS|DLC>","start_time":<start_time>,"end_time":<end_time>,"type":"ocd","ai_roadmap":true,"enable_sysom_link":false}' \
  --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis

Extract task_id from the response.

⚠️ [CRITICAL] Sysom.TaskInProgress Error Handling: If invoke-diagnosis returns a Sysom.TaskInProgress error, this means a diagnosis task is already running. You MUST:

1. Extract the existing task_id from the error message using string match (pattern: ocd(<task_id>) or similar identifier in the message body)
2. Immediately proceed to the polling flow with the extracted task_id
3. NEVER treat TaskInProgress as a fatal failure or abort the workflow

Poll Results (interval: 10s, max: 60 attempts)

bash

aliyun sysom get-diagnosis-result --task-id <task_id> --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis

Check the status field in the response:

• Ready / Running → MUST continue polling at 10s intervals
• Success → diagnosis complete, proceed to Step 8
• Fail → diagnosis failed, inform the user

⛔ [CRITICAL] Mandatory Polling Rules (MUST OBEY — violations will produce incorrect results):

1. Running status is NORMAL — it simply means the diagnosis engine is still working. You MUST continue polling every 10 seconds. Running is NOT an error and MUST NOT trigger early termination.
2. NEVER abandon polling early — do NOT stop polling before reaching Success, Fail, or the 60-attempt limit. Do NOT "give up" after a few Running responses.
3. NEVER fall back to manual analysis — if polling is ongoing or timed out, you MUST NOT attempt to manually diagnose the issue by analyzing ListServices output, instance metadata, or any other data source. The diagnosis report is the ONLY valid source of root cause information.
4. NEVER fabricate diagnosis results — if the task has not reached Success status, you MUST NOT output any summary.overall_status, summary.root_cause, or summary.suggestions values. These fields come exclusively from the completed diagnosis result.
5. Timeout handling — if still incomplete after 60 polling attempts, output ONLY this template and stop:

   text

   ⏳ SysOM diagnosis task timed out
   - Task ID: <task_id>
   - Current status: <status>
   - Suggestion: Please continue waiting for the diagnosis to complete.
   

   FORBIDDEN to add alternative suggestions, manual analysis, or fabricated conclusions in timeout output.

Step 8 — Result Parsing and Output

Parse the returned JSON and present summary.overall_status, summary.root_cause, summary.suggestions, issues[], and other key information to the user.

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Success Verification

For verification methods of each phase, see references/verification-method.md.

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Cleanup

The diagnosis operations in this skill are read-only and do not modify the PAI service / job state — no cleanup is needed.

PAI EAS / DLC are fully managed services — there is no agent to install or uninstall.

After all CLI operations are complete, you MUST disable AI-Mode:

bash

aliyun configure ai-mode disable

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Command Tables

For the full CLI command list, see references/related-commands.md.

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Best Practices

1. Product auto-inferred silently: product is determined from the instance prefix (eas- → EAS, dlc → DLC) — only ask user when the prefix is unrecognizable
2. Resource validation is mandatory: EAS calls ListServices to verify existence; DLC calls GetJob to verify existence AND check ResourceType is Lingjun
3. Instance ID used directly in params: Both EAS (eas-m-xxx) and DLC (dlcxxxxxxxx) instance IDs are passed as-is in the instance field — do NOT convert to ServiceName
4. Use real-time diagnosis mode by default: Unless the user explicitly specifies a time range, default to real-time diagnosis
5. Credential security: Never print or echo AK/SK values in conversation
6. All business CLI commands must include --user-agent AlibabaCloud-Agent-Skills/alibabacloud-aes-sysom-pai-diagnosis (system commands like version, configure, plugin do not use --user-agent)
7. Remediation suggestions may involve high-risk operations: Follow the Human-in-the-loop protocol and wait for user confirmation
8. No enrollment / agent installation needed: PAI EAS and DLC are managed services; SysOM accesses them through the platform side, not via instance-level agents

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Unsupported Scenarios

• Non-PAI products (use alibabacloud-aes-sysom-os-diagnosis for ECS instances)
• PAI products other than EAS and DLC (e.g., DSW, MaxCompute) — current skill scope is EAS / DLC only
• Pure configuration issues (e.g., model version mismatch, EAS routing config — no OS-level diagnosis needed)

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Error Handling

Error Scenario	CLI Response	Agent Action
Invalid EAS ServiceId	ListServices returns empty	Inform user the service ID does not exist in the region, stop pipeline
Invalid DLC JobId	GetJob returns not found	Inform user the DLC job ID does not exist, stop pipeline
DLC ResourceType not Lingjun	GetJob returns non-Lingjun type	Inform user SysOM only supports Lingjun resources, stop pipeline
Unknown product / ambiguous prefix	Cannot infer from instance	Explicitly ask user to choose EAS or DLC
Role authorization failure	initial-sysom returns error	Prompt user to check SysOM service activation status
Diagnosis invocation failure	invoke-diagnosis returns error	Check credential, permission, and product field correctness
Diagnosis timeout	get-diagnosis-result polling timeout	Output timeout template, suggest user retry later
Insufficient permissions	API returns Forbidden	Read references/ram-policies.md and guide user to request permissions

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Reference Links

Reference	Description
references/cli-installation-guide.md	Aliyun CLI installation and configuration guide
references/ram-policies.md	RAM permission policy list
references/related-commands.md	Full CLI command list
references/verification-method.md	Success verification methods for each phase
references/diagnose-workflow.md	Detailed diagnosis workflow (Steps 4–8)
references/acceptance-criteria.md	Test acceptance criteria