如何使用给定模式尾部-f最新日志文件 [英] How to tail -f the latest log file with a given pattern

问题描述

我使用某些每小时生成一个日志文件的日志系统，如下所示:

I work with some log system which creates a log file every hour, like follows:

SoftwareLog.2010-08-01-08
SoftwareLog.2010-08-01-09
SoftwareLog.2010-08-01-10

我正在尝试跟踪最新的日志文件，并提供一种模式(例如SoftwareLog *)，但我意识到有:

I'm trying to tail to follow the latest log file giving a pattern (e.g. SoftwareLog*) and I realize there's:

tail -F (tail --follow=name --retry)

，但是只能使用一个特定的名称-并且这些名称在日期和小时上具有不同的名称.我尝试过类似的事情:

but that only follow one specific name - and these have different names by date and hour. I tried something like:

tail --follow=name --retry SoftwareLog*(.om[1])  

但是通配符语句在传递给尾部之前已被挽救，并且不会在每次重试尾部时重新执行.

but the wildcard statement is resoved before it gets passed to tail and doesn't re-execute everytime tail retries.

有什么建议吗?

推荐答案

您可能想尝试多重尾巴- http://www.vanheusden.com/multitail/

You might want to try out multitail - http://www.vanheusden.com/multitail/

如果您想坚持Dennis Williamson的回答(我已经对他进行+1了)，这是为您填充的空白.

If you want to stick with Dennis Williamson's answer (and I've +1'ed him accordingly) here are the blanks filled in for you.

在您的shell中，运行以下脚本(或者等效于zsh，在看到zsh标记之前，我先用bash编写了该脚本):

In your shell, run the following script (or it's zsh equivalent, I whipped this up in bash before I saw the zsh tag):

#!/bin/bash

TARGET_DIR="some/logfiles/"
SYMLINK_FILE="SoftwareLog.latest"
SYMLINK_PATH="$TARGET_DIR/$SYMLINK_FILE"

function getLastModifiedFile {
    echo $(ls -t "$TARGET_DIR" | grep -v "$SYMLINK_FILE" | head -1)
}

function getCurrentlySymlinkedFile {
    if [[ -h $SYMLINK_PATH ]]
    then
        echo $(ls -l $SYMLINK_PATH | awk '{print $NF}')
    else
        echo ""
    fi
}

symlinkedFile=$(getCurrentlySymlinkedFile)
while true
do
    sleep 10
    lastModified=$(getLastModifiedFile)
    if [[ $symlinkedFile != $lastModified ]]
    then
        ln -nsf $lastModified $SYMLINK_PATH
        symlinkedFile=$lastModified
    fi
done

使用常规方法处理该背景(再次，我不知道zsh，所以可能有所不同)...

Background that process using the normal method (again, I don't know zsh, so it might be different)...

./updateSymlink.sh 2>&1 > /dev/null

然后单击tail -F $SYMLINK_PATH，以便尾部指示符号链接的更改或文件的旋转.

Then tail -F $SYMLINK_PATH so that the tail hands the changing of the symbolic link or a rotation of the file.

这有点令人费解，但是我不知道用尾巴做这件事的另一种方法.如果其他人知道可以处理此问题的实用程序，请让他们向前走，因为我也很想亲自查看它-默认情况下，如Jetty之类的应用程序会以这种方式记录日志，并且我总是编写在cron上运行的符号链接脚本来补偿为此.

This is slightly convoluted, but I don't know of another way to do this with tail. If anyone else knows of a utility that handles this, then let them step forward because I'd love to see it myself too - applications like Jetty by default do logs this way and I always script up a symlinking script run on a cron to compensate for it.

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