https://ops.docs.72602.space/using/database/index.html Elastic Search DSL FAQ Redis 连接报 ‘Connection refused’ 排查步骤： 确认 Redis pod 在运行： kubectl -n storage get pods -l app.kubernetes.io/instance=redis-shared 确认 Service 端点正常： kubectl -n storage get endpoints redis-shared-master 从客户端 pod 内测试连通： kubectl exec -it <pod> -- redis-cli -h redis-shared-master.storage -a <password> ping 如果外部应用连不上，确认使用的是正确的 namespace： redis-shared-master.storage.svc.cluster.local:6379 如果密码不对，从 secret 获取： kubectl -n storage get secret redis-shared-credentials -o jsonpath='{.data.redis-password}' | base64 -d PostgreSQL 连接报 ‘password authentication failed’ 确认密码 secret 存在： Hugo en Mon, 07 Oct 2024 19:58:45 +0800 https://ops.docs.72602.space/using/database/elastic_search/index.html Mon, 07 Oct 2024 19:58:45 +0800 https://ops.docs.72602.space/using/database/elastic_search/index.html Basic Query exist query normal advanced Returns documents that contain an indexed value for a field. GET /_search { "query": { "exists": { "field": "user" } } } The following search returns documents that are missing an indexed value for the user.id field. GET /_search { "query": { "bool": { "must_not": { "exists": { "field": "user.id" } } } } } fuzz query normal advanced Returns documents that contain terms similar to the search term, as measured by a Levenshtein edit distance.