How to make traefik work with graylog2?

问题

I'm getting this error when entering to web interface url:

 Server currently unavailable
We are experiencing problems connecting to the Graylog server running on http://127.0.0.1:9000/api. Please verify that the server is healthy and working correctly.

You will be automatically redirected to the previous page once we can connect to the server.

Do you need a hand? We can help you.

More details

docker-compose.yml:

graylog:
    image: graylog2/server:2.3.0-1
    environment:
      GRAYLOG_PASSWORD_SECRET: xxx
      GRAYLOG_ROOT_PASSWORD_SHA2: xxx
      GRAYLOG_WEB_ENDPOINT_URI: http://example.com/api/
      GRAYLOG_REST_LISTEN_URI:  http://0.0.0.0:9000/api/
      GRAYLOG_WEB_LISTEN_URI: http://0.0.0.0:9000/
      GRAYLOG_ELASTICSEARCH_CLUSTER_NAME: graylog
      GRAYLOG_ELASTICSEARCH_HOSTS: http://graylog-elasticsearch:9200
    depends_on:
      - graylog-elasticsearch
      - mongo
    networks:
      - traefik
      - default
      - graylog
    deploy:
      labels:
        - "traefik.port=9000"
        - "traefik.tags=logging"
        - "traefik.docker.network=infra_traefik"
        - "traefik.backend=graylog"
      restart_policy:
        condition: on-failure
      replicas: 1
      placement:
        constraints:
          - node.labels.name == manager-1

As you see everything should work without any problem.

Here's what netstat shows:

root@6399d2a13c5d:/usr/share/graylog# netstat -tulnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:9000            0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.11:42255        0.0.0.0:*               LISTEN      -
udp        0      0 127.0.0.11:51199        0.0.0.0:*                           -

Here's container printenv:

    root@6399d2a13c5d:/usr/share/graylog# printenv
    GRAYLOG_ELASTICSEARCH_CLUSTER_NAME=graylog
    HOSTNAME=6399d2a13c5d
    TERM=xterm
    GRAYLOG_WEB_ENDPOINT_URI=http://example.com/api/
    GRAYLOG_REST_LISTEN_URI=http://0.0.0.0:9000/api/
    GRAYLOG_ROOT_PASSWORD_SHA2=ччч
    CA_CERTIFICATES_JAVA_VERSION=20140324
    GRAYLOG_PASSWORD_SECRET=ччч
    GRAYLOG_REST_TRANSPORT_URI=http://example.com/api/
    PWD=/usr/share/graylog
    JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre
    LANG=C.UTF-8
    JAVA_VERSION=8u72
    SHLVL=1
    HOME=/root
    JAVA_DEBIAN_VERSION=8u72-b15-1~bpo8+1
    GRAYLOG_ELASTICSEARCH_HOSTS=http://graylog-elasticsearch:9200
    GRAYLOG_WEB_LISTEN_URI=http://0.0.0.0:9000/
    GOSU_VERSION=1.7
    GRAYLOG_SERVER_JAVA_OPTS=-Xms1g -Xmx2g -XX:NewRatio=1 -XX:MaxMetaspaceSize=256m -server -XX:+ResizeTLAB -XX:+UseConcMarkSweepGC -XX:+CMSConcurrentMTEnabled -XX:+CMSClassUnloadingEnabled -XX:+UseParNewGC -XX:-OmitStackTraceInFastThrow
    _=/usr/bin/printenv

I assume problem maybe within this custom header which graylog probably need:

RequestHeader set X-Graylog-Server-URL "http://graylog.example.org/api/"

回答1:

For the implementation example you have given I am assuming that example.org is a remote host rather than 127.0.0.1. In that situation, you are correct in assuming that the additional header is needed.
From my experience you should strip api/ for the the end user web access

You will need to set the request header X-Graylog-Server-URL. eg curl -H "X-Graylog-Server-URL: http://graylog.example.org/" http://127.0.0.1:9000.
Graylog web proxy config gives some good info if you want to setup a webserver in front of your graylog server. It's just a pity that (at the time of writing this) the Docker Examples do not include a basic nginx config

I am using kubernetes and had to add the following to my ingress annotation to get traffic in correctly

ingress:
  annotations:
    nginx.ingress.kubernetes.io/configuration-snippet: |
      proxy_set_header X-Graylog-Server-URL https://$server_name/;

回答2:

I think you should just use

GRAYLOG_WEB_ENDPOINT_URI=http://<your-host-ip>/api/

without rest URI settings.

来源：https://stackoverflow.com/questions/45725128/how-to-make-traefik-work-with-graylog2

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graylog2

Traefik