塞巴斯蒂安在这里，正在寻找有关景观服务器的一些答案。
我设置了 Ubuntu Server 18.04.4 LTS 并安装了 Landscape Server 19.10。一段时间内，系统运行良好，但几天后，在运行 Landscape 的 cron 作业时，系统不断遇到连接错误等。
以下脚本无法正常工作并不断向我发送电子邮件：/opt/canonical/landscape/scripts/meta_releases.sh /opt/canonical/landscape/scripts/report_anonymous_metrics.sh /opt/canonical/landscape/scripts/update_security_db.sh
我正在尝试自己解决这些问题，但找不到解决方案......这有点烦人;-)
以下是错误报告：
- meta_releases.sh
<11>Jun 10 00:30:05 meta-releases: Failed to fetch http://changelogs.ubuntu.com/meta-release: 'Error 35: gnutls_handshake() failed: The TLS connection was non-properly terminated.'
- 报告匿名指标
<11>Jun 10 00:55:01 report-anonymous-metrics: Error running /opt/canonical/landscape/scripts/report_anonymous_metrics.sh: 0 <11>Jun 10 00:55:09 report-anonymous-metrics: Check out the syslog output for script report-anonymous-metrics.
- 更新安全数据库
<11>Jun 10 06:42:33 update-security-db: Traceback (most recent call last):
<11>Jun 10 06:42:45 update-security-db: File "./process-usns", line 7, in <module>
<11>Jun 10 06:42:45 update-security-db: canonical.landscape.scripts.usn.run()
<11>Jun 10 06:42:45 update-security-db: File "/opt/canonical/landscape/canonical/landscape/scripts/batch.py", line 76, in __call__
<11>Jun 10 06:42:45 update-security-db: self.setup()
<11>Jun 10 06:42:45 update-security-db: File "/opt/canonical/landscape/canonical/landscape/scripts/batch.py", line 121, in setup
<11>Jun 10 06:42:45 update-security-db: self._add_cleanup_callback(self.run_amqp_client_in_thread(config))
<11>Jun 10 06:42:45 update-security-db: File "/opt/canonical/landscape/canonical/landscape/setup.py", line 336, in run_amqp_client_in_thread
<11>Jun 10 06:42:45 update-security-db: blockingCallFromThread(reactor, lambda: started)
<11>Jun 10 06:42:45 update-security-db: File "/usr/lib/python2.7/dist-packages/twisted/internet/threads.py", line 122, in blockingCallFromThread
<11>Jun 10 06:42:45 update-security-db: result.raiseException()
<11>Jun 10 06:42:45 update-security-db: File "<string>", line 2, in raiseException
<11>Jun 10 06:42:45 update-security-db: twisted.internet.error.ConnectionRefusedError: Connection was refused by other side: 111: Connection refused.
Error running /opt/canonical/landscape/scripts/update_security_db.sh: 0 Check out the syslog output for script update_security_db.sh.
由于我的服务器在代理后面运行，我仔细检查了（三重检查）我的配置文件和所有内容似乎没问题。手动运行 curl 下载元版本也很好。
我很高兴听到任何见解。
2020.06.15更新：
感谢您的意见！
我之前阅读了有关 cron 和代理的信息，并相应地设置了我的变量。
这是我的 /etc/environment：
LANG=de_DE.UTF-8
LANGUAGE=de
LC_ALL=de_DE.UTF-8
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
export http_proxy=http://{proxy-fqdn-here}:3128
export https_proxy=http://{proxy-fqdn-here}:3128
export ftp_proxy=http://{proxy-fqdn-here}:21
export no_proxy=localhost,{hostname-here},{hostname-fqdn-here}
#export HTTP_PROXY=$http_proxy
#export HTTPS_PROXY=$https_proxy
#export FTP_PROXY=$ftp_proxy
#export NO_PROXY=$no_proxy
这是 /etc/crontab，相同的配置：
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
http_proxy=http://{proxy-fqdn-here}:3128
https_proxy=http://{proxy-fqdn-here}:3128
ftp_proxy=http://{proxy-fqdn-here}:21
no_proxy=localhost,{hostname-here},{hostname-fqdn-here}
#HTTP_PROXY=$http_proxy
#HTTPS_PROXY=$https_proxy
#FTP_PROXY=$ftp_proxy
#NO_PROXY=$no_proxy
# m h dom mon dow user command
17 * * * * root cd / && run-parts --report /etc/cron.hourly
25 6 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
我甚至在 /etc/profile 和 /etc/security/pam_env.conf 中输入了我的代理配置，但它没有帮助。
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塞巴斯蒂安