在树莓派上安装leanote

作者：冥王星 "noright0@163.com"

前言

宿舍有个树莓派2B，连接到电视机，安装OSMC系统，USB接口连接移动硬盘一块，平时用来BT下载和看电影、美剧。

OSMC是基于Debian系统的，可以通过apt-get安装软件，软件仓库中有mongodb，而leanote也有相应的用于arm的二进制包，所以把leanote安装到树莓派是可行的。

mongodb 部分

安装mongodb

sudo apt-get install mongodb

安装软件一般我都用aptitude

配置mongodb运行的用户名

OSMC系统使用的是systemd，mongodb服务启动是在这个文件配置的：/etc/systemd/system/multi-user.target.wants/mongodb.service

文件的内容如下：

[Unit]
Description=An object/document-oriented database
Documentation=man:mongod(1)

[Service]
User=mongodb
ExecStart=/usr/bin/mongod --config /etc/mongodb.conf

[Install]
WantedBy=multi-user.target

我们把User=mongodb改为User=osmc，使其用osmc身份运行。（只是为了方便）

运行命令使配置生效。

sudo systemctl daemon-reload

修改mongodb配置文件

从上边的启动配置文件中可以看出，mongodb启动时读取/etc/mongodb.conf作为配置文件，这个文件的内容如下：

# mongodb.conf

# Where to store the data.
dbpath=/data/db

#where to log
logpath=/data/log/mongodb.log

logappend=true

bind_ip = 127.0.0.1
#port = 27017

# Enable journaling, http://www.mongodb.org/display/DOCS/Journaling
journal=true

# Enables periodic logging of CPU utilization and I/O wait
#cpu = true

# Turn on/off security.  Off is currently the default
#noauth = true
#auth = true

# Verbose logging output.
#verbose = true

# Inspect all client data for validity on receipt (useful for
# developing drivers)
#objcheck = true

# Enable db quota management
#quota = true

# Set oplogging level where n is
#   0=off (default)
#   1=W
#   2=R
#   3=both
#   7=W+some reads
#oplog = 0

# Diagnostic/debugging option
#nocursors = true

# Ignore query hints
#nohints = true                                                        

# Disable the HTTP interface (Defaults to localhost:27018).
#nohttpinterface = true                                            

# Turns off server-side scripting.  This will result in greatly limited
# functionality
#noscripting = true                                                    

# Turns off table scans.  Any query that would do a table scan fails.
#notablescan = true                                                    

# Disable data file preallocation.
#noprealloc = true                                                     

# Specify .ns file size for new databases.
# nssize = <size>                                                      

# Accout token for Mongo monitoring server.
#mms-token = <token>                                                           

# Server name for Mongo monitoring server.
#mms-name = <server-name>                                              

# Ping interval for Mongo monitoring server.
#mms-interval = <seconds>                                              

# Replication Options                                                  

# in replicated mongo databases, specify here whether this is a slave or master
#slave = true
#source = master.example.com
# Slave only: specify a single database to replicate
#only = master.example.com
# or
#master = true
#source = slave.example.com
# Address of a server to pair with.
#pairwith = <server:port>
# Address of arbiter server.
#arbiter = <server:port>
# Automatically resync if slave data is stale
#autoresync
# Custom size for replication operation log.
#oplogSize = <MB>
# Size limit for in-memory storage of op ids.
#opIdMem = <bytes>                                                             

# SSL options
# Enable SSL on normal ports
#sslOnNormalPorts = true
# SSL Key file and password
#sslPEMKeyFile = /etc/ssl/mongodb.pem
#sslPEMKeyPassword = pass

我们只需要修改数据库文件目录和日志文件的文件名。

因为树莓派的系统安装在TF卡上，频繁读写不仅速度慢，而且容易坏卡。而我的树莓派长期连接一个移动硬盘，所有把数据库文件和日志文件放到移动硬盘也就顺理成章了。

# Where to store the data.
dbpath=/media/sea2t/srv/db

#where to log
logpath=/media/sea2t/srv/log/mongodb.log

启动mongodb

# 启动命令
sudo service mongodb start
# 停止命令
sudo service mongodb stop
# 查看状态
sudo service mongodb status

leanote 部分

下载二进制安装包

从官网下载 leanote 的 for arm 的二进制文件。下载地址在这个网站：http://leanote.org/#download

https://sourceforge.net/projects/leanote-bin/files/2.0/leanote-linux-arm-v2.0.bin.tar.gz/download

解压文件

把安装包解压至移动硬盘。

/media/sea2t/srv/leanote

修改 leanote 配置文件

leanote的配置文件在这里：

/media/sea2t/srv/leanote/conf/app.conf

内容是这样的：

#------------------------
# leanote config
#------------------------

http.port=9000

site.url=http://localhost:9000 # or http://x.com:8080, http://www.xx.com:9000

# admin username
adminUsername=admin

# mongdb
db.host=127.0.0.1
db.port=27017
db.dbname=leanote # required
db.username= # if not exists, please leave it blank
db.password= # if not exists, please leave it blank
# or you can set the mongodb url for more complex needs the format is:
# mongodb://myuser:mypass@localhost:40001,otherhost:40001/mydb
# db.url=mongodb://root:root123@localhost:27017/leanote
# db.urlEnv=${MONGODB_URL} # set url from env. eg. mongodb://root:root123@localhost:27017/leanote

# You Must Change It !! About Security!!
app.secret=V85kbQ8qqtju9y2aDM55VWxAH9Qop19kcDVvrD0y 

#--------------------------------
# revel config
# for dev
#--------------------------------
app.name=leanote
http.addr=
http.ssl=false
cookie.httponly=false
cookie.prefix=LEANOTE
cookie.domain= # for share cookie with sub-domain
cookie.secure=false
format.date=2006-01-02
format.datetime=2006-01-02 15:04:05 # 必须这样配置
results.chunked=false

log.trace.prefix = "TRACE "
log.info.prefix  = "INFO  "
log.warn.prefix  = "WARN  "
log.error.prefix = "ERROR "

# The default language of this application.
i18n.default_language=en-us

module.static=github.com/revel/modules/static

[dev]
mode.dev=true
results.pretty=true
watch=true

module.testrunner = # github.com/revel/modules/testrunner

log.trace.output = stderr
log.info.output  = stderr
log.warn.output  = stderr
log.error.output = stderr

[prod]
mode.dev=false
results.pretty=false
watch=false

module.testrunner =

log.trace.output = off
log.info.output  = off
log.warn.output  = %(app.name)s.log
log.error.output = %(app.name)s.log

我们需要修改的部分有：http.port,site.url,app.secret，其他暂时不需要修改。

需要注意的是site.url，这个是你正文中加在图片等附件前边的url部分，如果和你访问网站的url不同，就不能在网站中看到图片等附件。切切！

设置 leanote 的启动服务

我们把 mongodb.service 复制一下，修改为启动 leanote

sudo cp /etc/systemd/system/multi-user.target.wants/mongodb.service /etc/systemd/system/multi-user.target.wants/leanote.service

[Unit]
Description=Leanote, Not Just A Notepad!

[Service]
User=osmc
ExecStart=/media/sea2t/srv/leanote/bin/run.sh

[Install]
WantedBy=multi-user.target

运行命令使配置生效

sudo systemctl daemon-reload

初始化数据库

运行这个命令初始化数据库（请确认数据库已启动）

mongorestore -h localhost -d leanote --directoryperdb /media/sea2t/srv/leanote/mongodb_backup/leanote_install_data/

启动 leanote

# 启动 leanote
sudo service leanote start
# 停止 leanote
sudo service leanote stop
# 查看状态
sudo service leanote status

备份

一个是数据库文件，备份这个目录

/media/sea2t/srv/db

一个是内容图片附件，备份这个目录

/media/sea2t/srv/leanote/files

一个是leanote配置文件

/media/sea2t/srv/leanote/conf/app.conf

存在的问题

由于 /media/sea2t是通过usb接口连接到系统，系统启动后自动挂载的，所以mongodb和leanote启动时/media/sea2t还没挂载上，两个服务会启动失败，需要手动启动一下。

解决办法：写启动脚本，启动前先等待移动硬盘挂载。

/home/osmc/start_mongodb.sh

#!/bin/bash

while [ ! -f "/media/sea2t/srv/db/local.0" ]; do
    echo "=> Waiting for sea2t to be mounted"
    sleep 5
done

/usr/bin/mongod --config /etc/mongodb.conf

/home/osmc/start_leanote.sh

#!/bin/bash

while [ ! -f "/media/sea2t/srv/leanote/bin/run.sh" ]; do
    echo "=> Waiting for sea2t to be mounted"
    sleep 5
done

/media/sea2t/srv/leanote/bin/run.sh

/etc/systemd/system/multi-user.target.wants/mongodb.service

[Unit]
Description=An object/document-oriented database
Documentation=man:mongod(1)

[Service]
User=osmc
ExecStart=/home/osmc/start_mongodb.sh
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target

/etc/systemd/system/multi-user.target.wants/leanote.service

[Unit]
Description=Leanote, Not Just A Notepad!

[Service]
User=osmc
ExecStart=/home/osmc/start_leanote.sh
Restart=always
RestartSec=30

[Install]
WantedBy=multi-user.target