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Unexpected Offset
Errors [2025-04-28 08:22:01,606] INFO [MetadataLoader id=100] initializeNewPublishers: the loader is still catching up because we still don't know the high water mark yet. (org.apache.kafka.image.loader.MetadataLoader) [2025-04-28 08:22:01,706] INFO [Metadata...
Nginx Access Log Stats
Log Format log_format main '$remote_addr - $remote_user [$time_local] ' '"$request" $status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for" ' 'rt="$request_time" ' ...
Log Format Sed
Source Format log_format main '$remote_addr - $remote_user [$time_local] ' '"$reqpwuest" $status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; Dest Format log_format main '$remote_addr - $re...
Rate Limiting
Basic Configuration limit_req_zone $binary_remote_addr zone=mylimit:10m rate=10r/s; server { location /login/ { limit_req zone=mylimit; proxy_pass http://my_upstream; } } limit_req_zone: Defines the params for rate limiting. Define...
Real IP
A: 透传客户端真实IP有没有场景是双层nginx透传的 B: 目前只有 nginx 透传 istio 或者 f5 透传 istio 的吧 A: code的30004有一个自己的nginx做透传，然后整体平台前面还有一个nginx代理 C: 你只需要关心TCP那层就可以，Code获取真实IP是通过Haproxy的Proxy Protocol v2 协议，所以只需要支持这个协议就可以，Nginx、haproxy 都可以 A: 两个nginx绕过任意一个都能透传，放在一起就有问题，我在家里复现下 A: Ngi...
Cannot Assign Requested Address
Errors HTTP 5022025/02/12 11:10:57 [crit] 27#27: *3710624 connect() to 10.1.114.15:8080 failed (99: Cannot assign requested address) while connecting to upstream, client: 10.244.71.211, server: foo, request: "POST /api/gateway/login/123 HTTP/1.1", upstream: "...
Storage CN
https://prometheus.io/docs/prometheus/latest/storage/ Prometheus 包含一个本地磁盘上的时间序列数据库，也可以选择集成远程存储系统。 本地存储 Prometheus 的本地时序数据库以一种自定义且高效的格式将数据存储在本地存储中。 磁盘布局 Prometheus 会将采集到的样本按两个小时为一组划分为数据块（block）。每个两个小时的数据块对应一个目录，该目录中包含： 一个 chunks 子目录（存放该时间段内所有时间序列的样本） 一个元数据文件（...
Storage
https://prometheus.io/docs/prometheus/latest/storage/ Prometheus includes a local on-disk time series database, but also optionally integrates with remote storage systems. Local storage Prometheus's local time series database stores data in a custom, highly e...
Write Ahead Log
Disk Watermark flood stage disk watermark [95%] exceeded on ... Launch Params --storage.tsdb.retention.time=7d --storage.tsdb.retention.size=50GB --storage.tsdb.wal-compression WAL 目录不受 tsdb.retention.size 控制 WAL 目录会定期自动压缩到 block 重启会强制压缩 WAL 数据 --storage....
vmagent
Links Title URL Targets http://vmagent-host:8429/targets API Targets http://vmagent-host:8429/api/v1/targets Service Discovery http://vmagent-host:8429/service-discovery Logs {"ts":"2025-03-07T03:59:26.070Z","level":"info","caller":"VictoriaMet...
vmoperator
VM Operator will install CRDs. kubectl get crd | grep victoria vlogs.operator.victoriametrics.com 2025-06-06T04:05:21Z vmagents.operator.victoriametrics.com 2025-06-06T04:05:21Z vmalertmanagerconfigs.operator.victoriametrics...
vmselect
Links Title URL vmui http://vmselect-host:8481/select/0/vmui Job Values http://vmselect-host:8481/select/0/prometheus/api/v1/label/job/values tomato{ "status": "success", "isPartial": false, "data": [ "apiserver", "backup_mysql_increm...
vmstorage
TTL kubectl get vmcluster kubectl edit vmcluster xxx vmcluster: vmstorage: retentionPeriod: "0.233" 1 means 30 days. 0.233 means 7 days.
Scrape Config
Static Config: -promscrape.config=scrape.yaml CRD VMScrapeConfig -> Prometheus ScrapeConfig VMServiceScrape -> Prometheus ServiceMonitor VM Operator will transfer CRD to -promscrape.config=scrape.yaml VM Operator VictoriaMetrics Operator 在你创建了 VMServiceS...
Installation
K8s 1.18.3 Can't install because the k8s version is too old. 0.50.0 Failed Chart: victoria-metrics-operator-0.39.1.tgz Image: 0.50.0 values.yaml: global.image.registry: “foo.example.com/prod” image.tag: “0.50.0” crds.enabled: false 0.35.0 Success Chart:...
maxQueryLen
Errors 422: error when executing query="sum(rate(container_cpu_usage_seconds_total{namespace=\"foo\",container!=\"POD\",container!=\"\",pod=~\"(agent-client-demo-54f8d....too long query; got 34101 bytes; mustn't exceed `-search.maxQueryLen=16384` bytes Conf...
maxScrapeSize
Errors promscrape.maxScrapeSize is too small exceeds -promscrape.maxScrapeSize=16777216; either reduce the response size for the target or increase -promscrape.maxScrapeSize Configuration Update vmagent deployment, add --promscrape.maxScrapeSize: 128MB. spe...
Too Many Labels
Errors 时间：2025-03-28T07:29:53.959Z 等级：WARN 调用位置：VictoriaMetrics/lib/timeserieslimits/timeseries_limits.go:72 消息：忽略具有 41 个标签的时序数据。 原因：超出了 -maxLabelsPerTimeseries=40 的限制。 建议：减少该指标的标签数量，或提高命令行参数 -maxLabelsPerTimeseries 的值。 Source{"ts":"2025-03-28T07:29:53.959Z...
Term 1
hassle-free 无麻烦的，省心的。 Go compiles to a single, static binary with minimal runtime dependencies, making deployment straightforward and hassle-free. syntactic sugar 语法糖。obscure => 模糊/掩盖。 Ruby’s principle of “programmer happiness” sometimes results in syntactic...
Common Commands 1
MAN This command can view different sections of the manual pages. man man man - an interface to the system reference manuals The table below shows the section numbers of the manual followed by the types of pages they contain. 1 Executable programs or shell...