使用前提
已安装
采集Docker容器日志
1. 准备iLogtail配置目录
新建配置目录user_yaml_config.d目，在目录中创建file_simple.yaml和stdout_simple.yaml。
在file_simple.yaml中配置采集容器中的simple.log到标准输出。
enable: true
inputs:
- Type: file_log
LogPath: /root
FilePattern: simple.log
DockerFile: true
flushers:
- Type: flusher_stdout
OnlyStdout: true
在stdout_simple.yaml中配置采集容器标准输出并输出到simple.stdout文件。
enable: true
inputs:
- Type: service_docker_stdout # 容器标准输出流输入类型
Stderr: false # 不采集标准错误流
Stdout: true # 采集标准输出流
flushers:
- Type: flusher_stdout # 标准输出流输出类型
FileName: simple.stdout # 重定向文件名
您也可以直接从下面的地址下载示例配置。
mkdir user_yaml_config.d && cd user_yaml_config.d
wget https://raw.githubusercontent.com/alibaba/ilogtail/main/example_config/start_with_docker/user_yaml_config.d/file_simple.yaml
wget https://raw.githubusercontent.com/alibaba/ilogtail/main/example_config/start_with_docker/user_yaml_config.d/stdout_simple.yaml
cd -
2. 启动iLogtail容器，并挂载iLogtail配置目录
docker run -d --name docker_ilogtail \
-v /:/logtail_host:ro \
-v /var/run:/var/run \
-v /var/lib/docker_ilogtail/checkpoint:/usr/local/ilogtail/checkpoint \
-v `pwd`/user_yaml_config.d:/usr/local/ilogtail/user_yaml_config.d \
sls-opensource-registry.cn-shanghai.cr.aliyuncs.com/ilogtail-community-edition/ilogtail:latest
第1行-d参数表示后台启动iLogtail容器，--name指定容器名称以便引用。
第2行将主机/目录挂载到iLogtail容器中，iLogtail依赖logtail_host路径采集容器日志。
第3行将主机/var/run目录挂载到iLogtail容器中，iLogtail依赖/var/run目录与容器引擎通信。
第4行将主机目录挂载到容器中iLogtail的checkpoint目录，使采集状态在容器重启时可恢复。
第5行将配置目录挂载到iLogtail容器中。
3. 查看ilogtail_docker容器自身标准输出日志
docker logs docker_ilogtail
结果为
delay stop seconds: 0
ilogtail started. pid: 10
register fun v2 0xa34f3c 0xa34f86 0xa34fdc 0xa35576
2022/07/14 16:23:17 DEBUG Now using Go's stdlib log package (via loggers/mappers/stdlib).
load log config /usr/local/ilogtail/plugin_logger.xml
recover stderr
recover stdout
4. 进入iLogtail容器
docker exec -it docker_ilogtail bash
5. 查看采集到的标准输出
cat /usr/local/ilogtail/simple.stdout
结果为
2022-07-14 16:23:20 {"content":"delay stop seconds: 0","_time_":"2022-07-14T16:23:17.704235928Z","_source_":"stdout","_image_name_":"sls-opensource-registry.cn-shanghai.cr.aliyuncs.com/ilogtail-community-edition/ilogtail:1.1.0","_container_name_":"docker_ilogtail","_container_ip_":"172.17.0.2","__time__":"1657815797"}
2022-07-14 16:23:20 {"content":"ilogtail started. pid: 10","_time_":"2022-07-14T16:23:17.704404952Z","_source_":"stdout","_image_name_":"sls-opensource-registry.cn-shanghai.cr.aliyuncs.com/ilogtail-community-edition/ilogtail:1.1.0","_container_name_":"docker_ilogtail","_container_ip_":"172.17.0.2","__time__":"1657815797"}
2022-07-14 16:23:20 {"content":"recover stdout","_time_":"2022-07-14T16:23:17.847939016Z","_source_":"stdout","_image_name_":"sls-opensource-registry.cn-shanghai.cr.aliyuncs.com/ilogtail-community-edition/ilogtail:1.1.0","_container_name_":"docker_ilogtail","_container_ip_":"172.17.0.2","__time__":"1657815797"}
6. 构造示例日志
echo 'Hello, iLogtail!' >> /root/simple.log
7. 查看采集到的容器文件日志
跳出容器，在宿主机上执行
docker logs docker_ilogtail
结果相比第3步的结果，多了
2022-07-14 16:26:20 {"__tag__:__path__":"/root/simple.log","content":"Hello, iLogtail!","__time__":"1657815980"}