docker - DataDog Docker代理未从应用程序容器接收日志

Question

我有Golang应用程序，它使用Logrus将日志写入Stdout。
我试图重新创建这个https://github.com/DataDog/docker-compose-example场景，并用我的应用程序替换python应用程序。
但是日志并没有发送到Datadog dashboad
这是docker-compose我正在尝试工作

version: "3"
services:
  gos:
    build: goapp
    stdin_open: true
    ports:
      - "6000:6000"
    volumes:
      - /tmp/goapp:/tmp/goapp
      - ./goapp:/code
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      - DATADOG_HOST=datadog
  web:
    build: web
    command: python app.py
    ports:
     - "5000:5000"
    volumes:
     - ./web:/code # modified here to take into account the new app path
    links:
     - redis
    environment:
     - DATADOG_HOST=datadog # used by the web app to initialize the Datadog library
  redis:
    image: redis
  # agent section
  datadog:
    build: datadog
    links:
     - redis # ensures that redis is a host that the container can find
     - web # ensures that the web app can send metrics
    environment:
     - DD_API_KEY=34f-------63c
    volumes:
     - /var/run/docker.sock:/var/run/docker.sock
     - /proc/:/host/proc/:ro
     - /sys/fs/cgroup:/host/sys/fs/cgroup:ro

我还通过此 https://docs.datadoghq.com/logs/log_collection/docker/?tab=containerinstallation说明尝试为代理安装非组成但简单的docker容器。

我使用以下命令运行golang应用程序容器

docker run -v /var/run/docker.sock:/var/run/docker.sock:rw -d testgo

使用Dockerfile

FROM golang:1.7.3
WORKDIR /go/src/github.com/alexellis/href-counter/
RUN go get -d -v github.com/Sirupsen/logrus
COPY app.go .
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app .

FROM alpine:latest  
RUN apk --no-cache add ca-certificates
WORKDIR /root/
COPY --from=0 /go/src/github.com/alexellis/href-counter/app .
EXPOSE 6000
LABEL "com.datadoghq.ad.logs"='[{"source": "goapp", "service": "webapp"}]'
CMD ["./app"] 

和DD代理可以看到应用程序容器的起伏，但没有收到任何日志

Answer 1

在我看来，您似乎在docker-compose datadog服务配置中缺少了几个环境变量。还有添加用于从Docker套接字跟踪日志的注册表的卷。如果没有，也许尝试这样的事情？

  # agent section
  datadog:
    build: datadog
    links:
     - redis # ensures that redis is a host that the container can find
     - web # ensures that the web app can send metrics
    environment:
     - DD_API_KEY=34f-------63c
     - DD_LOGS_ENABLED=true
     - DD_LOGS_CONFIG_CONTAINER_COLLECT_ALL=true
     - DD_AC_EXCLUDE="name:datadog-agent"
    volumes:
     - /var/run/docker.sock:/var/run/docker.sock:ro
     - /proc/:/host/proc/:ro
     - /sys/fs/cgroup/:/host/sys/fs/cgroup:ro
     - /opt/datadog-agent/run:/opt/datadog-agent/run:rw

从那里开始，如果仍然遇到麻烦，则可能需要联系support@datadoghq.com寻求帮助。他们很快就会回复。