#937 LiteLLM 副 key 启用脚本 + 计划 (20260810-154721)

新增 litellm/apply_secondary_key.sh + rollback + verify + README + docs/observability/litellm-failover-activation.md. 代码层已就绪(commit 84d89ab),等用户提供 SiliconFlow 副 key 后,单次低峰会话完成切换.

litellm/verify_failover.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# litellm/verify_failover.sh - 验证主副 key 都工作
+
+set -euo pipefail
+LITELLM_URL="http://localhost:12900"
+MASTER_KEY="sk-litellm-master-key-aiflow-2026"
+MODEL="deepseek-ai/DeepSeek-V4-Flash"
+
+echo "=== 1. health ==="
+curl -s -o /dev/null -w "%{http_code}\n" $LITELLM_URL/health/liveliness
+echo "=== 2. test primary key (should work) ==="
+curl -s -X POST $LITELLM_URL/v1/chat/completions \
+    -H "Authorization: Bearer $MASTER_KEY" \
+    -H "Content-Type: application/json" \
+    -d "{\"model\":\"$MODEL\",\"messages\":[{\"role\":\"user\",\"content\":\"say hi\"}],\"max_tokens\":5}" \
+    | head -c 200
+echo ""
+echo "=== 3. check /metrics for failover count ==="
+curl -s $LITELLM_URL/metrics | grep -E "litellm_deployment_fail" | head -3 || echo "  (no fail metric yet)"
+