markDown 的使用

标题

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# 一级标题
## 二级标题
依次类推

列表

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在 Markdown 下，列表的显示只需要在文字前加上 - 或 * 即可变为无序列表，
有序列表则直接在文字前加 1. 2. 3. 符号要和文字之间加上一个字符的空格。

引用

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只需要在文本前加入 > 这种尖括号（大于号）即可

图片与链接

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插入链接与插入图片的语法很像，区别在一个 !号

粗体与斜体

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Markdown 的粗体和斜体也非常简单，用两个 * 包含一段文本就是粗体的语法，
用一个 * 包含一段文本就是斜体的语法。

我只粗体，我是斜体。

表格

表格是我觉得 Markdown 比较累人的地方，例子如下：

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| Tables        | Are           | Cool  |
| ------------- |:-------------:| -----:|
| col 3 is      | right-aligned | $1600 |
| col 2 is      | centered      |   $12 |
| zebra stripes | are neat      |    $1 |

Tables Are Cool
col 3 is right-aligned $1600
col 2 is centered $12
zebra stripes are neat $1

分割线

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分割线的语法只需要另起一行，连续输入三个星号 *** 即可。

代码框

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如果你是个程序猿，需要在文章里优雅的引用代码框，在 Markdown 下实现也非常简单，
只需要用两个 ` 把中间的代码包裹起来.
如 `System.out.println()`

System.out.println()

redis集群搭建 

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搭建的是一个1主3从的redis+3个哨兵集群的环境，由于是在一台物理机上，所有我们用端口区分。
物理机IP：192.168.0.12
主节点master端口：6301
从节点slave1端口：6315
从节点slave2端口：6316
从节点slave3端口：6317
哨兵sentinel1端口：26301
哨兵sentinel2端口：26302
哨兵sentinel3端口：26303

下载redis && 复制

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下载redis后然后解压，
复制 
cp redis-benchmark redis-cli redis-server redis-sentinel /usr/bin/ #这个倒是很有用，这样就不用再执行时加上./了，而且可以在任何地方执行

设置内存分配策略（可选，根据服务器的实际情况进行设置）

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/proc/sys/vm/overcommit_memory
可选值：0、1、2。
0， 表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；
    否则，内存申请失败，并把错误返回给应用进程。
1， 表示内核允许分配所有的物理内存，而不管当前的内存状态如何。
2， 表示内核允许分配超过所有物理内存和交换空间总和的内存

开启redis端口，修改防火墙配置文件

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    vi /etc/sysconfig/iptables 
加入端口配置
    -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 6379 -j ACCEPT 
重新加载规则
    service iptables restart

配置redis.config文件

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1、主节点master的配置文件redis_master_6301.config：
# Redis configuration file example
################################## INCLUDES ###################################
# include /path/to/local.conf
# include /path/to/other.conf
################################ GENERAL  #####################################
daemonize yes
pidfile ./run/redis_slaver1_6315.pid
port 6301
tcp-backlog 511
# bind 192.168.1.100 10.0.0.1
# bind 127.0.0.1
# unixsocket /tmp/redis.sock
# unixsocketperm 700
timeout 0
tcp-keepalive 0
loglevel notice
logfile "./run/logs/log_master_6301.log"
databases 16
################################ SNAPSHOTTING  ################################
save ""
# save 900 1
# save 300 10
# save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum no
dbfilename dump_6301.rdb
dir ./run/data
################################# REPLICATION #################################
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
# repl-ping-slave-period 10
# repl-timeout 60
repl-disable-tcp-nodelay no
# repl-backlog-size 1mb
# repl-backlog-ttl 3600
slave-priority 100
# min-slaves-to-write 3
# min-slaves-max-lag 10
################################## SECURITY ###################################
# rename-command CONFIG ""
################################### LIMITS ####################################
# maxclients 10000
# maxmemory <bytes>
# maxmemory-policy noeviction
# maxmemory-samples 5
############################## APPEND ONLY MODE ###############################
appendonly no
appendfilename "appendonly_6301.aof"
appendfsync no
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
################################ LUA SCRIPTING  ###############################
lua-time-limit 5000
################################ REDIS CLUSTER  ###############################
# cluster-enabled yes
# cluster-config-file nodes-6379.conf
# cluster-node-timeout 15000
# cluster-slave-validity-factor 10
# cluster-migration-barrier 1
# cluster-require-full-coverage yes
################################## SLOW LOG ###################################
slowlog-log-slower-than 10000
slowlog-max-len 128
################################ LATENCY MONITOR ##############################
latency-monitor-threshold 0
############################# EVENT NOTIFICATION ##############################
notify-keyspace-events ""
############################### ADVANCED CONFIG ###############################
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-entries 512
list-max-ziplist-value 64
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
2、从节点slave1的配置文件redis_slave_6315.config：
# Redis configuration file example
################################## INCLUDES ###################################
# include /path/to/local.conf
# include /path/to/other.conf
################################ GENERAL  #####################################
daemonize yes
pidfile ./run/redis_slaver1_6315.pid
port 6315
tcp-backlog 511
# bind 192.168.1.100 10.0.0.1
# bind 127.0.0.1
# unixsocket /tmp/redis.sock
# unixsocketperm 700
timeout 0
tcp-keepalive 0
loglevel notice
logfile "./run/logs/log_slaver1_6315.log"
databases 16
################################ SNAPSHOTTING  ################################
save ""
# save 900 1
# save 300 10
# save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum no
dbfilename dump_6315.rdb
dir ./run/data
################################# REPLICATION #################################
slaveof 192.168.0.12 6301
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
# repl-ping-slave-period 10
# repl-timeout 60
repl-disable-tcp-nodelay no
# repl-backlog-size 1mb
# repl-backlog-ttl 3600
slave-priority 80
# min-slaves-to-write 3
# min-slaves-max-lag 10
################################## SECURITY ###################################
# rename-command CONFIG ""
################################### LIMITS ####################################
# maxclients 10000
# maxmemory <bytes>
# maxmemory-policy noeviction
# maxmemory-samples 5
############################## APPEND ONLY MODE ###############################
appendonly no
appendfilename "appendonly_6315.aof"
appendfsync no
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
################################ LUA SCRIPTING  ###############################
lua-time-limit 5000
################################ REDIS CLUSTER  ###############################
# cluster-enabled yes
# cluster-config-file nodes-6379.conf
# cluster-node-timeout 15000
# cluster-slave-validity-factor 10
# cluster-migration-barrier 1
# cluster-require-full-coverage yes
################################## SLOW LOG ###################################
slowlog-log-slower-than 10000
slowlog-max-len 128
################################ LATENCY MONITOR ##############################
latency-monitor-threshold 0
############################# EVENT NOTIFICATION ##############################
notify-keyspace-events ""
############################### ADVANCED CONFIG ###############################
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-entries 512
list-max-ziplist-value 64
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
3、从节点slave2的配置文件redis_slave_6316.config：
与上面slave1配置文件需要修改的地方
pidfile ./run/redis_slaver1_6316.pid
port 6316
logfile "./run/logs/log_slaver1_6316.log"
dbfilename dump_6316.rdb
appendfilename "appendonly_6316.aof"
4、从节点slave3的配置文件redis_slave_6317.config：
与上面slave1配置文件需要修改的地方
pidfile ./run/redis_slaver1_6317.pid
port 6317
logfile "./run/logs/log_slaver1_6317.log"
dbfilename dump_6317.rdb
appendfilename "appendonly_6317.aof"
5、哨兵sentinel1的配置文件sentinel_26301.config:
# Example sentinel.conf
port 26301
# sentinel announce-ip 1.2.3.4
dir ./run/tmp
sentinel monitor master1 192.168.0.12 6301 2
# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd
# sentinel down-after-milliseconds <master-name> <milliseconds>
sentinel down-after-milliseconds master1 30000
sentinel parallel-syncs master1 1
sentinel failover-timeout master1 180000
# sentinel notification-script mymaster /var/redis/notify.sh
# sentinel client-reconfig-script mymaster /var/redis/reconfig.sh
# sentinel can-failover master1 yes
logfile "/redis-3.0.0/run/logs/sentinellog_m1_26301.log"
6、哨兵sentinel2的配置文件sentinel_26302.config:
# Example sentinel.conf
port 26302
# sentinel announce-ip 1.2.3.4
dir ./run/tmp
sentinel monitor master1 192.168.0.12 6301 2
# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd
# sentinel down-after-milliseconds <master-name> <milliseconds>
sentinel down-after-milliseconds master1 30000
sentinel parallel-syncs master1 1
sentinel failover-timeout master1 180000
# sentinel notification-script mymaster /var/redis/notify.sh
# sentinel client-reconfig-script mymaster /var/redis/reconfig.sh
# sentinel can-failover master1 yes
logfile "/redis-3.0.0/run/logs/sentinellog_m1_26302.log"
7、哨兵sentinel3的配置文件sentinel_26303.config:
# Example sentinel.conf
port 26303
# sentinel announce-ip 1.2.3.4
dir ./run/tmp
sentinel monitor master1 192.168.0.12 6301 2
# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd
# sentinel down-after-milliseconds <master-name> <milliseconds>
sentinel down-after-milliseconds master1 30000
sentinel parallel-syncs master1 1
sentinel failover-timeout master1 180000
# sentinel notification-script mymaster /var/redis/notify.sh
# sentinel client-reconfig-script mymaster /var/redis/reconfig.sh
# sentinel can-failover master1 yes
logfile "/redis-3.0.0/run/logs/sentinellog_m1_26303.log"
````    
# 启动redis和哨兵服务
```yaml
注意：第一次要先启动redis主服务、从服务，然后才能启动哨兵服务
1、进入redis安装目录的根目录
2、启动redis主节点
[root@localhost redis-3.0.0]# redis-server redis_master_6301.config &
3、启动redis从节点
[root@localhost redis-3.0.0]# redis-server redis_slave_6315.config &
[root@localhost redis-3.0.0]# redis-server redis_slave_6316.config &
[root@localhost redis-3.0.0]# redis-server redis_slave_6317.config &
4、启动哨兵
[root@localhost redis-3.0.0]# redis-sentinel sentinel_26301.config &
[root@localhost redis-3.0.0]# redis-sentinel sentinel_26302.config &
[root@localhost redis-3.0.0]# redis-sentinel sentinel_26303.config &
到目前为止整个redis+sentinel的安装搭建环境就算完成
`

常用命名

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进入redis的安装目录
启动redis-server：
./redis-server redis_6305.conf &
启动redis-sentinel 
./redis-sentinel sentinel_6301.config
./redis-server sentinel_6316.conf --sentinel &
查看某个端口信息：
./redis-cli -p 6301 info
./redis-cli -p 6301 info Replication
./redis-cli -p 6301 info Sentinel
查看某个主机上的信息redis信息
./redis-cli -h 10.16.41.52 -p 6316 info
./redis-cli -h 10.16.41.52 -p 6316 info Replication
./redis-cli -h 10.16.41.52 -p 6316 info Sentinel
关闭本机redis服务
./redis-cli -p 6379 shutdown
关闭远程主机redis服务
./redis-cli -h 192.168.9.18 -p 6379 shutdown
客户端连接本机
./redis-cli -p 6301
客户端连接远程机
./redis-cli -h 10.16.41.53 -p 6301
切换连接
ssh app@10.16.41.52
使用命令关闭RDB持久化
`

logback 日志配置

写入文件配置

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<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <fileNamePattern>logFile.%d{yyyy-MM-dd}.log</fileNamePattern>
        <maxHistory>90</maxHistory>
    </rollingPolicy>
    <encoder>
        <charset>utf-8</charset>
        <Pattern>%d %-5level [%thread] %logger{0}: %msg%n</Pattern>
    </encoder>
</appender>

写入mysql数据库配置

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<appender name="DB" class="ch.qos.logback.classic.db.DBAppender">
     <!--日志异步到数据库 -->
     <connectionSource class="ch.qos.logback.core.db.DataSourceConnectionSource">
         <!--连接池 -->
         <dataSource class="org.springframework.jdbc.datasource.DriverManagerDataSource">
             <driverClassName>com.mysql.jdbc.Driver</driverClassName>
             <url>jdbc:mysql://localhost:3306/DB</url>
             <username >root</username>
             <password>root</password>
         </dataSource>
     </connectionSource>
 </appender>

写入控制台配置

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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
     <!-- 日志输出编码 -->  
     <Encoding>UTF-8</Encoding>   
      <layout class="ch.qos.logback.classic.PatternLayout">   
           <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--> 
          <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n   
          </pattern>   
      </layout>   
 </appender>

异步写入

<appender name="ASYNC" class="ch.qos.logback.classic.AsyncAppender">
      <queueSize>512</queueSize>
      <appender-ref ref="FILE"/>
</appender>