Linux下Couchbase的安装&升级&维护最佳指南

Couchbase是一个强大的、可靠的NoSql数据库.
Couchbase是CouchDB和MemBase的合并。而MemBase是基于Memcached的。因此Couchbase联合了CouchDB的简单可靠和Memcached的高性能和可扩展性.

[X] 安装

[1] 设置/etc/selinux/config文件中的SELINUX="" 为disabled

[2] vi/etc/modprobe.d/blacklist.conf

blacklist ipv6
1

setenforce 0
swapoff -a
chkconfig ip6tables off
chkconfig iptables off
service ip6tables stop
service iptables stop
1
2
3
4
5
6

[3] vi/etc/rc.d/rc.local

#wjw_add
su root -lc 'swapoff -a'
1
2

[4] vi /etc/sysctl.conf

#wjw_add
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
kernel.pid_max = 65536
fs.aio-max-nr = 1048576
fs.file-max = 6815744

net.core.rmem_default = 16777216
net.core.rmem_max = 16777216
net.core.wmem_default = 16777216
net.core.wmem_max = 16777216

net.core.somaxconn = 262144
net.ipv4.tcp_no_metrics_save = 1
net.core.netdev_max_backlog = 262144

net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 16384 16777216
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_congestion_control=cubic
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_retries2 = 5
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 30
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_max_orphans = 262144
net.ipv4.conf.lo.arp_ignore = 0
net.ipv4.conf.lo.arp_announce = 0
net.ipv4.conf.all.arp_ignore = 0
net.ipv4.conf.all.arp_announce = 0

net.nf_conntrack_max = 655360
net.netfilter.nf_conntrack_tcp_timeout_established = 180

net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 16384 16777216
net.ipv4.tcp_congestion_control=cubic

net.ipv6.conf.all.disable_ipv6=1
vm.swappiness=0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51

[5] 执行:sysctl -p

[6] vi/etc/security/limits.conf

*               soft    nproc   655350
*               hard    nproc   655350
*               soft    nofile  655350
*               hard    nofile  655350
1
2
3
4

[7] vi/etc/pam.d/login

session    required     /lib64/security/pam_limits.so
1

[8] 刷新缓存

swapoff -a
sync
echo 3 > /proc/sys/vm/drop_caches
1
2
3

[9] rpm couchbase

scp admin@192.168.2.113:/opt/install/couchbase-server-enterprise-3.0.2-centos6.x86_64.rpm /opt/
rpm -ivh /opt/couchbase-server-enterprise-3.0.2-centos6.x86_64.rpm
1
2

[X] 升级

[X] 通过SWAP的在线升级:

1. 添加SWAP节点到集群,然后做Rebalance!
2. 通过Fail Over方式拿掉要升级的节点,然后做Rebalance!
3. 执行:service couchbase-server stop

当service couchbase-server stop不能停止时:
要使用:killall epmd和killall beam.smp后再用ps -ef | grep -i 'couchbase' | grep -v grep查看是否还有/opt/couchbase目录下的进程,如果有就kill掉!

4. rpm -ev $(rpm -qa | grep -i ‘couchbase’)
5. rm -rf /opt/couchbase/*
6. rpm -ivh ./couchbase-server-enterprise_2.5.1_x86_64.rpm

[X] 没有SWAP的快速在线升级:

1. 关掉:Auto-Failover
2. service couchbase-server stop
3. rpm -Uvh /opt/couchbase-server-enterprise-3.0.2-centos6.x86_64.rpm

---

附录:

[X] 当出现:runuser: command not found错误信息时,安装yum install coreutils!

[X] 当service couchbase-server stop不能停止时:

要使用:`killall epmd`和`killall beam.smp`后再用`ps -ef  | grep -i 'couchbase' | grep -v grep`查看是否还有/opt/couchbase目录下的进程,如果有就kill掉!
1

[X] Couchbase相关指令

service couchbase-server stop
ps -ef  | grep -i 'couchbase' | grep -v grep
rpm -qa | grep -i 'couchbase'
1
2
3

[X] 疑难问答

1. How do I change the per-node RAM quota?

/opt/couchbase/bin/couchbase-cli cluster-init -c 192.168.1.41:8091 -u admin -p youyuan --cluster-init-ramsize=110000

2. bucket-compact

/opt/couchbase/bin/couchbase-cli bucket-compact -c 192.168.1.71:8091 -u admin -p youyuan --bucket=default

3. setting-compaction

/opt/couchbase/bin/couchbase-cli setting-compaction -c 192.168.1.71:8091 -u admin -p youyuan --compaction-period-from= --compaction-period-to=

4. bucket-edit

/opt/couchbase/bin/couchbase-cli bucket-edit -c 192.168.1.71:8091 -u admin -p youyuan --bucket=default --compaction-period-from= --compaction-period-to=

5. 备份

/opt/couchbase/bin/cbbackup -u admin -p youyuan -b conf http://${host}:8091 /opt/backups-couchbase/backup-conf
例如(备份指定的Bucket): /opt/couchbase/bin/cbbackup -u admin -p youyuan -b conf http://localhost:8091 /opt/backups-couchbase/backup-conf-20140415

6. 恢复

/opt/couchbase/bin/cbrestore -u admin -p youyuan -b conf /opt/backups-couchbase/backup-conf http://${host}:8091

[X] 当集群出现大规模问题时,紧急处理步骤:

不要使用service couchbase-server stop,要使用:killall epmd和killall beam.smp后再用ps -ef | grep -i 'couchbase' | grep -v grep查看是否还有/opt/couchbase目录下的进程,如果有就kill掉!