SLS Log Query and Troubleshooting

---

name: alicloud-observability-sls-log-query

description: Query and troubleshoot logs in Alibaba Cloud Log Service (SLS) using query|analysis syntax and the Python SDK. Use for time-bounded log search, error investigation, and root-cause analysis workflows.

version: 1.0.0

---

Category: service

# SLS Log Query and Troubleshooting

Use SLS query|analysis syntax and Python SDK for log search, filtering, and analytics.

Prerequisites

python3 -m venv .venv
. .venv/bin/activate
python -m pip install -U aliyun-log-python-sdk

- `ALIBABA_CLOUD_ACCESS_KEY_ID`

- `ALIBABA_CLOUD_ACCESS_KEY_SECRET`

- `SLS_ENDPOINT` (e.g. `cn-hangzhou.log.aliyuncs.com`)

- `SLS_PROJECT`

- `SLS_LOGSTORE`(supports a single value or comma-separated values)

Query Composition

See `references/query-syntax.md` for full syntax.

Quickstart (Python SDK)

import os
import time
from aliyun.log import LogClient, GetLogsRequest

client = LogClient(
    os.environ["SLS_ENDPOINT"],
    os.environ["ALIBABA_CLOUD_ACCESS_KEY_ID"],
    os.environ["ALIBABA_CLOUD_ACCESS_KEY_SECRET"],
)

project = os.environ["SLS_PROJECT"]
logstore = os.environ["SLS_LOGSTORE"]

query = "status:500"
start_time = int(time.time()) - 15 * 60
end_time = int(time.time())

request = GetLogsRequest(project, logstore, start_time, end_time, query=query)
response = client.get_logs(request)
for log in response.get_logs():
    print(log.contents)

Script quickstart

python skills/observability/sls/alicloud-observability-sls-log-query/scripts/query_logs.py \
  --query "status:500" \
  --last-minutes 15

Optional args: `--project`, `--logstore`(repeatable, or comma-separated values), `--endpoint`, `--start`, `--end`, `--last-minutes`, `--limit`, `--parallel`.

Troubleshooting script

python skills/observability/sls/alicloud-observability-sls-log-query/scripts/troubleshoot.py \
  --group-field status \
  --last-minutes 30 \
  --limit 20

Optional args: `--error-query`, `--group-field`, `--limit`, `--logstore`(repeatable, or comma-separated values), `--parallel`, plus the time range args above.

Workflow

1) Ensure Logstore indexing is enabled (queries/analysis fail without index).

2) Write query clause and append analysis clause when needed.

3) Execute with SDK/script and inspect results.

4) Control returned rows with `limit`; narrow time range when needed.

Validation

mkdir -p output/alicloud-observability-sls-log-query
for f in skills/observability/sls/alicloud-observability-sls-log-query/scripts/*.py; do
  python3 -m py_compile "$f"
done
echo "py_compile_ok" > output/alicloud-observability-sls-log-query/validate.txt

Pass criteria: command exits 0 and `output/alicloud-observability-sls-log-query/validate.txt` is generated.

Output And Evidence

References