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README.md
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README.md
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# synology-nfs-mount-tools
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This is a repo that contains tools/documentations to help nfs mounting configuration in Synology
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## How to config Synology for NFS
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Synology's DSM WebGUI has capability to set NFS configuration to allow Linux to access files on Synology NAS, follow [tutorial: How to access files on Synology NAS within the local network (NFS)](https://www.synology.com/en-us/knowledgebase/DSM/tutorial/File_Sharing/How_to_access_files_on_Synology_NAS_within_the_local_network_NFS)
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But the GUI's feature is limited. We need more fine tuning. Following [NFS: Overview and Gotchas](http://www.troubleshooters.com/linux/nfs.htm), we can set Synology properly. (If the URL is broken, we can refer to [NFS: Overview and Gotchas in repo](/source/NFS_Overview/NFS\ Overview\ and\ Gotchas.htm)
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### Summary of how to configure NFS server
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Configuring an NFS server is just placing a line in `/etc/exports` file. The line's general syntax is:
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```
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directory_being_shared subnet_allowed_to_access(options)
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```
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There are 2 kinds of options:
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* General options (ignored here)
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* User ID Mapping options (need to be mentioned here)
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We want to make directories accessible as if the incoming request was from that user or that group, which is done by combining `all_squash` option with `anonuid` and `anongid` options.
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e.g.
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```
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/volume1/homes 192.168.1.85(rw,sync,no_wdelay,crossmnt,all_squash,insecure_locks,sec=sys,anonuid=1025,anongid=100)
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```
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where:
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* `/volume1/homes` is the directory to be shared
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* `192.168.1.85` is the ip address of client
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* `rw` is Read/Write
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* `async` is for fast access. `sync` is for safer access
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* `no_wdelay` is "Write disk as soon as possible"
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* `anonuid=1025` is uid of "guest"
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* `anongid=100` is gid of "guest/user"
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### Summary of how to configure client
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```
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mount -t nfs -o rw 192.168.100.85:/data/altamonte /mnt/test
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```
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## Current solution
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Due to limitation of NFS4.0, idmapping is too hard (mismatch between server and client's uid/gid), and kerberos authentication is too hard to setup. The only solution is NFS+`chown`
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1. Setup NFS permission of shared folder on Synology
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2. mount volume to client
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3. When writing files, remember to chown afterward
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For plex server, I need to align LXC's uid and gid with Synology
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Load Diff
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<!DOCTYPE html>
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<html><head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8"><meta charset="utf-8"><title>VimVixen console</title><script src="console_data/console.js"></script><style>html,body,*{margin:0;padding:0}body{position:absolute;bottom:0;left:0;right:0;overflow:hidden}.vimvixen-console{bottom:0;margin:0;padding:0}.vimvixen-console-command-wrapper{border-top:1px solid gray}.vimvixen-console-completion{background-color:white;font-style:normal;font-family:monospace;font-size:12px;line-height:16px}.vimvixen-console-completion-title{background-color:lightgray;font-weight:bold;margin:0;padding:0}.vimvixen-console-completion-item{padding-left:1.5rem;background-position:0 center;background-size:contain;background-repeat:no-repeat;white-space:pre}.vimvixen-console-completion-item.vimvixen-completion-selected{background-color:yellow}.vimvixen-console-completion-item-caption{display:inline-block;width:40%;text-overflow:ellipsis;overflow:hidden}.vimvixen-console-completion-item-url{display:inline-block;color:green;width:60%;text-overflow:ellipsis;overflow:hidden}.vimvixen-console-message{font-style:normal;font-family:monospace;font-size:12px;line-height:16px;border-top:1px solid gray}.vimvixen-console-error{background-color:red;font-weight:bold;color:white}.vimvixen-console-info{background-color:white;font-weight:normal;color:green}.vimvixen-console-command{background-color:white;display:flex}.vimvixen-console-command-prompt{font-style:normal;font-family:monospace;font-size:12px;line-height:16px}.vimvixen-console-command-input{border:none;flex-grow:1;font-style:normal;font-family:monospace;font-size:12px;line-height:16px}
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</style></head><body><div id="vimvixen-console" class="vimvixen-console"></div></body></html>
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<style type="text/css">
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div.centerer{text-align: center;}
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div.monthfea{
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margin-left: auto;
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margin-right: auto;
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text-align: center;
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border-width: 6px;
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border-style: ridge;
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margin-top: 3.0ex;
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margin-bottom: 2ex;
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padding-top: 0.2ex;
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padding-bottom: 0.0ex;
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background-color: #ffffcc;
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max-width: 700px;
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font-weight: bold;
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font-size: 90%;
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}
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div.monthfea>p.monthfea{color: #000000; margin-top: 0ex; margin-bottom: 0.7ex;}
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</style>
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<!-- //HIDE FROM NON-JAVASCRIPT BROWSERS
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function loaddiv()
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{
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elm = document.getElementById('monthfea');
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line1='<p class="monthfea">May 2020 featured book:</p>';
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line2='<p class="monthfea"><a href=" http://www.troubleshooters.com/bookstore/ttech.htm">Troubleshooting Techniques of the successful technologist</a></p>';
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elm.innerHTML=line1+line2;
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}
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//-->
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