分类目录归档：Linux

resize2fs: Bad magic number in super-block while trying to open /dev/mapper/vg1-lvMysql

resize2fs 对xfs无效问题

resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/vg1-lvMysql
Couldn’t find valid filesystem superblock.

xfs_growfs /dev/centos/root
df -h

ref：https://www.cnblogs.com/pinganzi/p/6478255.html

[root@web5 ~]# xfs_growfs /mnt/mysql
meta-data=/dev/mapper/vg1-lvMysql isize=512    agcount=4, agsize=7864320 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=31457280, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=15360, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 31457280 to 44564480

authorized_keys

chmod 600 .ssh/authorized_keys
chmod 700 .ssh

LVM新安装初始化

/dev/vdb 为空白新磁盘

创建pv

pvcreate /dev/vdb

创建vg

vgcreate vg1 /dev/vdb

创建lv

lvcreate -L 100G -n lvMongodb vg1

或者（使用100%的剩余空间）

lvcreate -l 100%Free -n lvMysql vg1

后续参见https://www.yanglong.pro/lvm%e9%80%9f%e8%ae%b0/

LVM LV热扩容[ext4]

lvextend -L +5G /dev/mapper/vg1-lvMysql

resize2fs /dev/mapper/vg1-lvMysql

当然前提是PV还有PFree可以使用

org.apache.solr.common.SolrException: Exception writing document id 663b167f2d661568 to the index; possible analysis error: cannot change DocValues type from SORTED_SET to NUMERIC for field “is_original”

org.apache.solr.common.SolrException: Exception writing document id 663b167f2d661568 to the index; possible analysis error: cannot change DocValues type from SORTED_SET to NUMERIC for field "is_original"

我这里修改tints类型为tint类型，导致新数据无法写入，字段删除完毕了，也reload了没有，只要清理的数据才行

<delete><query>*:*</query></delete>
<commit/>

nginx 413 request entity too large

http://nginx.org/en/docs/http/ngx_http_core_module.html#client_max_body_size

Syntax:	`client_max_body_size size;`
Default:	client_max_body_size 1m;
Context:	`http`, `server`, `location`

这次不能忘记了啊

xtrabackup 快速增量备份教程

xtrabackup –backup –compress –target-dir=/mysqlbackup/full –user=aaa –host=hostname –password=xxxx –databases=ggggg

xtrabackup –backup –compress –target-dir=/mysqlbackup/incr –incremental-basedir=/mysqlbackup/full –user=aaa –host=hostname –password=xxxx –databases=ggggg

–compress 压缩

Centos7开放端口

开启防火墙
systemctl enable firewalld.service
# 启用某服务
firewall-cmd --permanent --zone=public --add-service=http
firewall-cmd --permanent --zone=public --add-service=https
# 移除某端口
firewall-cmd --zone=public --remove-port=80/tcp --permanent
# reload 使修改生效
firewall-cmd --reload

# 查看生效的配置
firewall-cmd --list-all
# 查看防火墙是否启动
firewall-cmd --stat
# 开放80端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
# reload生效
firewall-cmd --reload

shell脚本遍历文件每行

cat filename | while read line do echo '###' $line done

mongodb 3.4 官方资源导航

1. keyfiles内部验证
https://docs.mongodb.com/manual/core/security-internal-authentication/#keyfiles

2. 使用keyfile进行复制集之间的验证
https://docs.mongodb.com/manual/tutorial/enforce-keyfile-access-control-in-existing-replica-set/

3. 用户权限规矩
https://docs.mongodb.com/manual/reference/built-in-roles/#built-in-roles

杨龙

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