在同一主机上运行的多个容器的日志解决方案 [英] Logging solution for multiple containers running on same host

问题描述

目前，我们将所有应用程序日志从多个容器重定向到stdout，并通过主机中的rsyslog收集/ var / log / message到ELK堆栈。

Currently we are redirecting all application logs to stdout from multiple containers and collect /var/log/message via rsyslog in host to ELK stack.

所有docker容器日志显示为docker / xxxxxxxx，我们无法确定哪个应用程序是此日志，无论如何，我们可以轻松地将应用程序与多个容器日志区分开，从docker stdout ？

All docker container logs shows as docker/xxxxxxxx, we can't tell which application is this log for, anyway we can easily differentiate applications from multiple container logs from docker stdout?

推荐答案

（操作系统X的说明，但应在Linux中工作）

(Instructions for OS X but should work in Linux)

似乎没有办法使用docker命令执行此操作，但是在bash中，您可以同时运行多个命令，并且使用 sed 可以前缀与您的容器名称。

There doesn't appear to be a way to do this with a docker command, however in bash you can run multiple commands at the same time, and with sed you can prefix with your container name.

docker logs -f --tail=30 container1 | sed -e 's/^/[-- container1 --]/' &
docker logs -f --tail=30 container2 | sed -e 's/^/[-- container2 --]/' &

同时您将看到两个容器的输出。

And you will see output from both containers at the same time.

container1 :: logging line
container1 :: logging line
container2 :: logging line
container2 :: logging line
container1 :: logging line
container1 :: logging line
container2 :: logging line
container2 :: logging line

---

一次拖曳所有容器：

---

To tail all your containers at once:

#!/bin/bash

names=$(docker ps --format "{{.Names}}")
echo "tailing $names"

while read -r name
do
  # eval to show container name in jobs list
  eval "docker logs -f --tail=5 \"$name\" | sed -e \"s/^/[-- $name --] /\" &"
  # For Ubuntu 16.04
  #eval "docker logs -f --tail=5 \"$name\" |& sed -e \"s/^/[-- $name --] /\" &"
done <<< "$names"

function _exit {
  echo
  echo "Stopping tails $(jobs -p | tr '\n' ' ')"
  echo "..."

  # Using `sh -c` so that if some have exited, that error will
  # not prevent further tails from being killed.
  jobs -p | tr '\n' ' ' | xargs -I % sh -c "kill % || true"

  echo "Done"
}

# On ctrl+c, kill all tails started by this script.
trap _exit EXIT

# For Ubuntu 16.04
#trap _exit INT

# Don't exit this script until ctrl+c or all tails exit.
wait

并阻止他们运行 fg 然后按 ctrl + c 为每个容器。

And to stop them run fg and then press ctrl+c for each container.

更新：感谢@ Flo-Woo Ubuntu 16.04支持

Update: Thanks to @Flo-Woo for Ubuntu 16.04 support

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