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openGauss
Official skopeo copy \ --all \ docker://opengauss/opengauss:5.0.0 \ docker://registry.example.com/opengauss/opengauss:5.0.0 docker run -d \ --name opengauss \ -e GS_PASSWORD=foo \ -p 5492:5432 \ registry.example.com/opengauss/opengauss:5.0.0 ...
Recovery Mode
Error the database system is in recovery mode Sit Env Host: 192.168.80.9 psql -h apple-pgsql.db.example.com -p 5433 -U postgres Trouble Shooting Check recovery state. SELECT pg_is_in_recovery(); Use ps to get process running command. ps aux | grep pgsq...
WAL & Archive Mode
Problem Set wal_keep_size Set archive_mode=on Unset archive_command This will cause wal_keep_size to not work and the disk to fill up. wal_keep_size Controls the minimum number of WAL files that PostgreSQL will retain, even if they have been used by strea...
Split Brain
Architecture
graph TD subgraph Client A[Application] -->|SQL Query| B[TiDB Server] end subgraph TiDB Cluster B -->|Metadata Management| C[PD Server] B -->|Read/Write KV| D[TiKV Cluster] end subgraph TiKV Cluster D1[TiKV...
TiKV Disk Full
Errors ERROR 1105 (HY000): tikv disk full Get Process Info ps aux | grep tikv tidb 26560 42.8 4.8 10024340 6404508 ? Ssl 15:18 13:18 bin/tikv-server --addr 0.0.0.0:21163 --advertise-addr 192.168.48.90:21163 --status-addr 0.0.0.0:21183 --advertise...
Peer Dependencies
The --legacy-peer-deps flag in npm is used to ignore peer dependency conflicts during installation. It essentially tells npm to use the older (pre-npm v7) behavior when resolving dependencies. What are Peer Dependencies? peerDependencies are packages that a m...
React Form Item
问题根源 在原代码中,Form.Item 的子组件是 Space,而不是直接的 Select。这导致 Form.Item 无法正确地将表单数据传递给 Select 组件。 <Form.Item> <Space> <Select /> <Button /> </Space> </Form.Item> 修复方法 将 Select 组件直接作为 Form.Item 的子组件,而不再嵌套在 Space 中 将删除按钮,改为单独的 Button 组件并放在 Form.I...
React Tutorial
https://www.youtube.com/watch?v=SqcY0GlETPk Vite Vite (French word for "quick", pronounced /vit/, like "veet") is a new breed of frontend build tooling that significantly improves the frontend development experience. File Structure ├── public/ ...
Basic
Flow Load ansible.cfg. Load inventory from ansible.cfg. Exec biz yaml config file. Load var file from biz config file. Exec role main.yaml Module Debug - name: debug debug: msg: "命名空间:{{ monitor_namespace }},域名: {{ monitor_domain }}" Ensure Director...
Serve From Sub Path
Document Example [server] domain = tomato-monitor.example.com root_url = %(protocol)s://%(domain)s/grafana/ serve_from_sub_path = true
Installation
K8s 1.18.3 Chart: grafana-8.6.4.tgz Image: 11.4.0 seccompProfile is not support on k8s 1.18.3: Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(Deployment.spec.template.spec.contain...
Label Values Not Work
Grafana v11 Background Filter(exported_namespace) is not work with old prometheus in grafana 11. label_values(kube_pod_info{exported_namespace="$namespace"},exported_pod) INFOHello, and thank you for letting us know! Please see this change in Grafana v11. We...
Migrate Issue
MySQL 监控 - MySQL 查询数 没有图表 - MySQL Temporary Objects 没有图表 - MySQL 查询类型(范围/全表) 没有图表 需要设置 interval 变量为 auto,不能为 1s。 表格 Value 字段改名 Grafana 11 表格的 Value 字段改名为指标的名字,需要在 Transformations 里面修改。 Add Series to Rows Merge series/tables 检查所有纵坐标的单位 Standard options...
Install Kafka on K8s 1.18.3
Environment k8s: 1.18.3 Chart: bitnami/kafka:25.3.5 Image: kafka:3.5.1-debian-11-r44 Helm Chart helm search repo bitnami/kafka --versions helm pull bitnami/kafka --version 25.3.5 Disable Zookeeper kraft: ## @param kraft.enabled Switch to enable or dis...
KRaft
NodePort Access
Listerners 不区分外部和内部网络,只有一个监听端口(PLAINTEXT://:9092),Kafka 内部通信(broker 与 broker)和外部客户端(本地、测试工具等)都走这个端口。 listeners=PLAINTEXT://:9092 advertised.listeners=PLAINTEXT://123.123.123.123:31092 listener.security.protocol.map=PLAINTEXT:PLAINTEXT 区分多个类型 listeners=CLIENT...
JMX: Port Already in Use
Error: JMX connector server communication error: service:jmx:rmi://kafka-broker-0:5555 jdk.internal.agent.AgentConfigurationError: java.rmi.server.ExportException: Port already in use: 5555; nested exception is: java.net.BindException: Address already ...
Leader Not Available
Leader Parition Error [Producer ] Could not connect to leader for partition CodeWallEEvent/1: Kafka::LeaderNotAvailable Describe Topic Stat kafka-topics.sh --bootstrap-server localhost:9092 --describe --topic CodeWallEEvent Topic: CodeWallEEvent TopicId:...
Topic Not Present
Errors Source[open-telemetry-trace-id:,span-id:] 2025-03-31 17:01:32.553 ERROR 7 --- [at-handler-2591] o.s.k.support.LoggingProducerListener : Exception thrown when sending a message with key='null' and payload='{"notifyRole":"user","internal":{"isHtml":fa...