Rocket Chat 无法使用 Caddy 启用 SSL：找不到 libdns.so.162

Question

我按照文档here 使用 snap 安装了rocket chat。

现在我正在尝试按照文档启用 SSL：Auto SSL with Snaps。但是，出现以下错误：

$ sudo snap set rocketchat-server https=enable
error: cannot perform the following tasks:
- Run configure hook of "rocketchat-server" snap (run hook "configure": 
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dig: error while loading shared libraries: libdns.so.162: cannot open shared object file: No such file or directory
Error: Can't resove DNS query for <my_domain_name>, check your DNS configuration, disabling https ...
-----)

查看ldd 对dig 的评价，我发现其他几个库也没有找到：

$ ldd /snap/rocketchat-server/current/usr/bin/dig 
    linux-vdso.so.1 (0x0000ffff98afc000)
    libdns.so.162 => not found
    liblwres.so.141 => not found
    libbind9.so.140 => not found
    libisccfg.so.140 => not found
    libisc.so.160 => not found
    libpthread.so.0 => /lib/aarch64-linux-gnu/libpthread.so.0 (0x0000ffff98a71000)
    libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000ffff98900000)
    /lib/ld-linux-aarch64.so.1 (0x0000ffff98acc000)

所以，检查libdns.so 是否存在。

$ locate libdns.so
/snap/rocketchat-server/1437/usr/lib/aarch64-linux-gnu/libdns.so.162
/snap/rocketchat-server/1437/usr/lib/aarch64-linux-gnu/libdns.so.162.1.3
/usr/lib/aarch64-linux-gnu/libdns.so.1601
/usr/lib/aarch64-linux-gnu/libdns.so.1601.0.0

相关库似乎存在于 snap 下。

有没有办法解决这个问题并使 caddy/https 工作？

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系统：

• 树莓派 4 (aarch64)
• Linux ubuntu 5.4.0-1022-raspi
• Ubuntu 服务器 20.04.1 LTS

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类似问题：

• dig: error while loading shared libraries: libdns.so.162: cannot open shared object file: No such file or directory
• shared libraries of dig and nslookup

Answer 1

尝试对文件系统中的库进行软链接

ln -s /snap/rocketchat-server/1437/usr/lib/aarch64-linux-gnu/libdns.so.162 /lib

或者安装 dns-utils，它应该将缺少的库添加到您的系统中。