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Configuration
Exec Format Error
Image architecture(x86/arm64) not match. exec /run.sh: exec format error
Failed to Extract Layer
Errors FATA[0006] failed to extract layer sha256:d2d4d2c16a00dd998866a33049d4a1801ba34b719f377ffdf3ec7ae78c9b03eb: lstat /var/lib/containerd/io.containerd.snapshotter.v1.overlayfs/snapshots/566/fs/var/cache/dnf/update-e8b0d229956b0b0b: not a directory: unknow...
Nginx Logs
apiVersion: v1 kind: ConfigMap metadata: name: fluent-bit namespace: monitor selfLink: /api/v1/namespaces/monitor/configmaps/fluent-bit uid: 8e6515f6-bd93-4a01-82f5-e272dc423fd1 resourceVersion: '568097977' creationTimestamp: '2025-01-14T09:02:32Z'...
Promethus Alert Manager
Put alert message to kafka via fluent-bit. Prometheus Alert Manager v Fluent Bit HTTP Webhook v Kafka Topic Fluent Bit [SERVICE] Flush 1 Log_Level debug [INPUT] Name http Listen 0.0.0.0 Port 9880 [FILTER...
Kernel Logs
https://docs.fluentbit.io/manual/pipeline/inputs/kernel-logs Configuration [INPUT] Name kmsg Tag kernel [OUTPUT] Name stdout Match kube.* Json_date_key timestamp Json_date_format iso8601 Format json [2025/01/22 08:22:29] [er...
Kubernetes Events
https://docs.fluentbit.io/manual/pipeline/inputs/kubernetes-events Config [INPUT] name kubernetes_events tag kube_events kube_url https://kubernetes.default.svc ClusterRole kubectl edit clusterrole fluent-bit apiVersion: rbac.author...
Systemd
https://docs.fluentbit.io/manual/pipeline/inputs/systemd Configuration Fluent Bit [INPUT] Name systemd Tag systemd.kubelet Systemd_Filter _SYSTEMD_UNIT=kubelet.service Read_From_Tail On [INPUT] Name systemd ...
Tail
https://docs.fluentbit.io/manual/pipeline/inputs/tail Tailing files keeping state The tail input plugin a feature to save the state of the tracked files, is strongly suggested you enabled this. For this purpose the db property is available, e.g: fluent-bit -i...
Filter Order
Wrong [FILTER] Name modify Match kube.* Rename message log Rename msg log [FILTER] Name grep Match kube.* Exclude $log ^(GET /healthz|/ready|/health|/live|/ping)$ [FILTER] Name kube...
Invalid Entry
Invalid entry in /var/log/containers while fluent-bit pods start https://github.com/fluent/fluent-bit/issues/2676 Volume mount symlink should mount the link target too
Kube Tag Prefix
Error incoming record tag (kube.containers) is shorter than kube_tag_prefix value (kube.var.log.containers.), skip filter Reproduce Set Tag to kube.foobar will trigger error. [INPUT] Name tail Path /var/log/containers/*.log multi...
Too Many Open Files
https://github.com/fluent/fluent-bit/issues/1777 @aderuwe It might be more related to inotify mechanism - as by default (e.g. when using the default Docker image) this mechanism is used for tailing files in in_tail plugin: https://linux.die.net/man/2/inotify_...
Persistent Connection Issue
Make A Test Use latest GRPC version. Client A call Service B on pod B1. Pod B1 die. Weather Client A will transfer to pod B2? Reference https://groups.google.com/g/grpc-io/c/_Kr71gYtQrw?pli=1
Ingress Gateway Routing
When traffic goes into the istio-ingressgateway, how does the pod know which Gateway it should use to route the traffic? Match Gateway Envoy is the real gateway The Istio IngressGateway is a pod running Envoy proxy. It is configured by Istio control plane ...
Large Metrics
Sometimes the metrics exposed by Istio can be very large, which may cause vmagent to fail when scraping them. There are two solutions: Increase vmagent scrape size. Reduce metics size.
Priority
优先级规则 Istio 并不显式声明“优先级”字段,而是靠 match 顺序 + 精确度 来决定哪个匹配生效: 1. 同一个 VirtualService 内 http 匹配规则是 自上而下顺序匹配,一旦匹配成功,就不会继续往下匹配。 所以,越“精确”的规则(如 regex、长 prefix)应该写在前面。 2. 多个 VirtualService 之间 Istio 的文档中说明了以下几个关键点: 项目 描述 hosts 每个 VS 只能作用于其指定的 hosts(服务名或通配名) gate...
Architecture
graph LR A[Java 应用] -->|OTLP| B[OpenTelemetry Collector] B -->|OTLP| C[Jaeger All-in-One] graph LR A[Jaeger All-in-One] -->|gRPC Plugin| B[ClickHouse Plugin] B -->|SQL| C[ClickHouse Database]
OTEL Jaeger Exporter
Background Otel Collector remove native jaeger exporter port: 14250. Otel Collector use new otlp/jaeger exporter. Jaeger support otlp since v1.35.0. Connect Error Otel Collector can not connect to jaeger collector. 2025-02-19T08:56:49.561Z info i...
Logging Architecture
https://kubernetes.io/zh-cn/docs/concepts/cluster-administration/logging/ Logging Path docker: /var/lib/docker/containers/ containerd: /var/log/containers/ logrotate: /etc/logrotate.d
CPU Memory Stat
Node Stat #!/bin/bash echo -e "NODE\t\t\tCPU Requests\tCPU Limits\tMemory Requests\tMemory Limits" for node in $(kubectl get nodes -o name | cut -d'/' -f2); do kubectl describe node "$node" | awk -v node="$node" ' BEGIN { cpu_req = cpu_lim = m...