如何在 syslog 中禁用 logstash 错误日志记录

Posted 2023-02-22

【中文标题】如何在 syslog 中禁用 logstash 错误日志记录

【英文标题】：How to Disable logstash error logging in syslog

【发布时间】：2019-11-15 08:38:58

【问题描述】：

所有 Logstash 错误记录在 /var/log/logstash/* 中，但 Logstash 的所有错误日志也记录在 /var/log/syslog 中。 有什么方法可以在 /var/log/syslog 中禁用 Logstash 的日志记录错误？

【参考方案1】：

我想你从 systemd 运行 logstash。由于未知原因，logstash 打印它在 stdout/stderr 上的日志，因此 journald 将控制台输出转发到 syslog。 像这样在 systemd 单元文件中重定向 stdout/err：

[Service]
Type=simple
Restart=always
WorkingDirectory=/data/logstash
ExecStart=/usr/bin/sudo -u logstashuser bash -c "/opt/logstash/bin/logstash --path.settings /opt/logstash/conf >/dev/null 2>/logs/logstash/logstash.error.log"

然后

systemctl daemon-reload 

和

systemctl stop logstash.service
systemctl start logstash.service

【参考方案2】：

另一种解决方案是修改/etc/systemd/system/logstash.service并将这两个选项更改如下

StandardOutput=null
StandardError=null

# cat /etc/systemd/system/logstash.service
[Unit]
Description=logstash

[Service]
Type=simple
User=logstash
Group=logstash
# Load env vars from /etc/default/ and /etc/sysconfig/ if they exist.
# Prefixing the path with '-' makes it try to load, but if the file doesn't
# exist, it continues onward.
EnvironmentFile=-/etc/default/logstash
EnvironmentFile=-/etc/sysconfig/logstash
ExecStart=/usr/share/logstash/bin/logstash "--path.settings" "/etc/logstash"
StandardOutput=null
StandardError=null
Restart=always
WorkingDirectory=/
Nice=19
LimitNOFILE=16384

# When stopping, how long to wait before giving up and sending SIGKILL?
# Keep in mind that SIGKILL on a process can cause data loss.
TimeoutStopSec=infinity

[Install]
WantedBy=multi-user.target

那当然

#systemctl daemon-reload
#systemctl restart logstash