--- tags: notes --- # 用 Docker 執行 FluentD 作業系統: Ubutu 20.04 安裝 curl、docker、postman ## 下載範例檔案 新增一個工作目錄: ``` $ mkdir custom-fluentd $ cd custom-fluentd ``` 從 Github 下載 fluent.conf 和 entrypoint.sh，此時最新版為 v1.15: ``` $ curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/v1.15/alpine/fluent.conf > fluent.conf $ curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/v1.15/alpine/entrypoint.sh > entrypoint.sh $ chmod +x entrypoint.sh ``` 新增插件目錄，目錄中的 plugins scripts 會被複製進這個 Docker Image 中: ``` $ mkdir plugins ``` 下載 Dockerfile 範例: ``` curl https://raw.githubusercontent.com/fluent/fluentd-docker-image/master/Dockerfile.sample > Dockerfile ``` ## 製作 Dockerfile 在 Dockerfile 中填入 `MAINTAINER` 和下載 Fluentd plugins，預設範例已經有 fluent-plugin-elasticsearch。 ```dockerfile FROM fluent/fluentd:v1.15-1 MAINTAINER Jack_Lin <jacklin@cybersoft4u.com> USER root RUN apk add --no-cache --update --virtual .build-deps \ sudo build-base ruby-dev \ # cutomize following instruction as you wish && sudo gem install fluent-plugin-elasticsearch \ && sudo gem sources --clear-all \ && apk del .build-deps \ && rm -rf /home/fluent/.gem/ruby/2.5.0/cache/*.gem COPY fluent.conf /fluentd/etc/ COPY entrypoint.sh /bin/ USER fluent ``` 改寫 fluent.conf: ```xml # Hello World configuration will take events received on port 18080 using # HTTP as a protocol # set Fluentd's configuration parameters <system> Log_Level info </system> # define the HTTP source which will provide log events <source> @type http port 18080 </source> # accept all log events regardless of tag and write them to the console <match *> @type stdout </match> ``` 建置 Docker Image: ``` $ docker build -t custom-fluentd:latest ./ ``` ## 測試 用剛剛建立的 Docker Image 啟動一個 Container: - 命名為 custom-docker-fluent-logger - 將 logs 目錄掛載到 Container - 把連接埠 18080 對應到主機的 18080。 ``` $ mkdir -p logs $ docker run -it --rm --name custom-docker-fluent-logger -v $(pwd)/logs:/fluentd/logs -p 18080:18080 custom-fluentd:latest ``` 接著打開 Postman，傳送一個 json 到 localhost:18080。 ![](https://i.imgur.com/YHMzYfS.png) ![](https://i.imgur.com/dwcIbF7.png) 每傳送一次，在 custom-docker-fluent-logger 就會輸出一行 `{"Hello": "World"}`: ![](https://i.imgur.com/mY7UMFB.png)