1.脚本分析
#启动所有hadoop守护进程
sbin/start-all.sh
--------------
libexec/hadoop-config.sh
start-dfs.sh #用于启动namenode，datanode,secondarynamenode
start-yarn.sh #用于启动nodemanager,resourcemanager
#用于启动namenode，datanode,secondarynamenode
sbin/start-dfs.sh
--------------
libexec/hadoop-config.sh
sbin/hadoop-daemons.sh --config .. --hostname .. start namenode ...
sbin/hadoop-daemons.sh --config .. --hostname .. start datanode ...
sbin/hadoop-daemons.sh --config .. --hostname .. start sescondarynamenode ...
sbin/hadoop-daemons.sh --config .. --hostname .. start zkfc ... //
#用于启动nodemanager,resourcemanager
sbin/start-yarn.sh
--------------
libexec/yarn-config.sh
bin/yarn-daemon.sh start resourcemanager
bin/yarn-daemons.sh start nodemanager
#主要调用hadoop-daemon.sh，其中hadoop-daemons.sh在多个主机上启动，hadoop-daemon.sh在单个主机上启动，并且二者均可用于启动namenode，datanode,secondarynamenode
sbin/hadoop-daemons.sh
----------------------
libexec/hadoop-config.sh
slaves
hadoop-daemon.sh
#主要调用hdfs命令
sbin/hadoop-daemon.sh
-----------------------
libexec/hadoop-config.sh
bin/hdfs ....
#主要调用yarn命令，yarn-daemon.sh和yarn-daemons.sh均可用于启动nodemanager,resourcemanager
sbin/yarn-daemon.sh
-----------------------
libexec/yarn-config.sh
bin/yarn
使用stop-dfs.sh和stop-yarn.sh关闭所有hadoop守护进程：
henry@s201:~$ xcall.sh jps
============= s201 jps =============
5828 ResourceManager
5462 NameNode
48363 Jps
5676 SecondaryNameNode
============= s202 jps =============
30546 NodeManager
68245 Jps
30415 DataNode
============= s203 jps =============
68448 Jps
30812 NodeManager
30687 DataNode
============= s204 jps =============
30289 DataNode
68112 Jps
30426 NodeManager
henry@s201:~$
henry@s201:~$
henry@s201:~$ stop-dfs.sh
Stopping namenodes on [s201]
s201: stopping namenode
s204: stopping datanode
s203: stopping datanode
s202: stopping datanode
Stopping secondary namenodes [0.0.0.0]
0.0.0.0: stopping secondarynamenode
henry@s201:~$ xcall.sh jps
============= s201 jps =============
48772 Jps
5828 ResourceManager
============= s202 jps =============
30546 NodeManager
68349 Jps
============= s203 jps =============
68553 Jps
30812 NodeManager
============= s204 jps =============
68217 Jps
30426 NodeManager
henry@s201:~$ stop-yarn.sh
stopping yarn daemons
stopping resourcemanager
s203: stopping nodemanager
s204: stopping nodemanager
s202: stopping nodemanager
no proxyserver to stop
henry@s201:~$ xcall.sh jps
============= s201 jps =============
48928 Jps
============= s202 jps =============
68453 Jps
============= s203 jps =============
68657 Jps
============= s204 jps =============
68315 Jps
使用hadoop-daemons.sh、hadoop-daemon.sh、yarn-daemons.sh、yarn-daemon.sh启动所有hadoop进程
henry@s201:~$ xcall.sh jps
============= s201 jps =============
51938 Jps
============= s202 jps =============
70422 Jps
============= s203 jps =============
70618 Jps
============= s204 jps =============
70279 Jps
henry@s201:~$ hadoop-daemon.sh start namenode
starting namenode, logging to /home/henry/soft/hadoop-2.7.2/logs/hadoop-henry-namenode-s201.out
henry@s201:~$ jps
52048 Jps
51981 NameNode
henry@s201:~$ hadoop-daemon.sh start secondarynamenode
starting secondarynamenode, logging to /home/henry/soft/hadoop-2.7.2/logs/hadoop-henry-secondarynamenode-s201.out
henry@s201:~$ jps
52128 Jps
52081 SecondaryNameNode
51981 NameNode
henry@s201:~$ hadoop-daemons.sh start datanode
s204: starting datanode, logging to /home/henry/soft/hadoop-2.7.2/logs/hadoop-henry-datanode-s204.out
s203: starting datanode, logging to /home/henry/soft/hadoop-2.7.2/logs/hadoop-henry-datanode-s203.out
s202: starting datanode, logging to /home/henry/soft/hadoop-2.7.2/logs/hadoop-henry-datanode-s202.out
henry@s201:~$ xcall.sh jps
============= s201 jps =============
52208 Jps
52081 SecondaryNameNode
51981 NameNode
============= s202 jps =============
70608 Jps
70503 DataNode
============= s203 jps =============
70698 DataNode
70797 Jps
============= s204 jps =============
70359 DataNode
70458 Jps
henry@s201:~$ yarn-daemons.sh start nodemanager
s204: starting nodemanager, logging to /home/henry/soft/hadoop-2.7.2/logs/yarn-henry-nodemanager-s204.out
s203: starting nodemanager, logging to /home/henry/soft/hadoop-2.7.2/logs/yarn-henry-nodemanager-s203.out
s202: starting nodemanager, logging to /home/henry/soft/hadoop-2.7.2/logs/yarn-henry-nodemanager-s202.out
henry@s201:~$ xcall.sh jps
============= s201 jps =============
52081 SecondaryNameNode
52301 Jps
51981 NameNode
============= s202 jps =============
70675 NodeManager
70503 DataNode
70824 Jps
============= s203 jps =============
71013 Jps
70870 NodeManager
70698 DataNode
============= s204 jps =============
70531 NodeManager
70674 Jps
70359 DataNode
henry@s201:~$ yarn-daemon.sh start resourcemanager
starting resourcemanager, logging to /home/henry/soft/hadoop-2.7.2/logs/yarn-henry-resourcemanager-s201.out
henry@s201:~$ xcall.sh jps
============= s201 jps =============
52081 SecondaryNameNode
52596 Jps
52348 ResourceManager
51981 NameNode
============= s202 jps =============
70675 NodeManager
70503 DataNode
70861 Jps
============= s203 jps =============
71056 Jps
70870 NodeManager
70698 DataNode
============= s204 jps =============
70531 NodeManager
70359 DataNode
70717 Jps
2 常用命令
bin/hadoop
------------------------
hadoop verion //版本
hadoop fs //文件系统客户端.
hadoop jar //
hadoop classpath
hadoop checknative
bin/hdfs
------------------------
dfs // === hadoop fs
classpath
namenode -format
secondarynamenode
namenode
journalnode
zkfc
datanode
dfsadmin
haadmin
fsck
balancer
jmxget
mover
oiv
oiv_legacy
oev
fetchdt
getconf
groups
snapshotDiff
lsSnapshottableDir
portmap
nfs3
cacheadmin
crypto
storagepolicies
version
hdfs常用命令
--------------------
$>hdfs dfs -mkdir /user/centos/hadoop
$>hdfs dfs -ls -r /user/centos/hadoop
$>hdfs dfs -lsr /user/centos/hadoop
$>hdfs dfs -put index.html /user/centos/hadoop
$>hdfs dfs -get /user/centos/hadoop/index.html a.html
$>hdfs dfs -rm -r -f /user/centos/hadoop
- hadoop fs命令等价于hdfs dfs命令
- 使用hdfs dfs -mkdir -p /usr/ubuntu/hadoop
henry@s201:~$ hdfs dfs -mkdir -p /usr/ubuntu/hadoop
henry@s201:~$ hdfs dfs -ls -R /
drwxr-xr-x - henry supergroup 0 2018-06-26 08:46 /usr
drwxr-xr-x - henry supergroup 0 2018-06-26 08:46 /usr/ubuntu
drwxr-xr-x - henry supergroup 0 2018-06-26 08:46 /usr/ubuntu/hadoop
*使用hdfs dfs -put src dst命令上传文件到hadoop文件系统
henry@s201:~$ hdfs dfs -help put
-put [-f] [-p] [-l] <localsrc> ... <dst> :
Copy files from the local file system into fs. Copying fails if the file already
exists, unless the -f flag is given.
Flags:
-p Preserves access and modification times, ownership and the mode.
-f Overwrites the destination if it already exists.
-l Allow DataNode to lazily persist the file to disk. Forces
replication factor of 1. This flag will result in reduced
durability. Use with care.
henry@s201:~$ hdfs dfs -put index.xml /usr/ubuntu/hadoop
henry@s201:~$ hdfs dfs -ls -R /
drwxr-xr-x - henry supergroup 0 2018-06-26 08:46 /usr
drwxr-xr-x - henry supergroup 0 2018-06-26 08:46 /usr/ubuntu
drwxr-xr-x - henry supergroup 0 2018-06-26 08:52 /usr/ubuntu/hadoop
-rw-r--r-- 3 henry supergroup 853 2018-06-26 08:52 /usr/ubuntu/hadoop/index.xml
- 使用hdfs dfs -get命令从hadoop文件系统中下载文件到本地
henry@s201:~$ hdfs dfs -help get
-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst> :
Copy files that match the file pattern <src> to the local name. <src> is kept.
When copying multiple files, the destination must be a directory. Passing -p
preserves access and modification times, ownership and the mode.
henry@s201:~$ hdfs dfs -get /usr/ubuntu/hadoop a.xml
henry@s201:~$ ls -l a.xml
total 4
-rw-r--r-- 1 henry henry 853 6月 26 08:58 index.xml
- 使用hdfs dfs -rm命令删除文件
henry@s201:~$ hdfs dfs -rm -f /usr/ubuntu/hadoop/*
18/06/26 09:00:03 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 0 minutes, Emptier interval = 0 minutes.
Deleted /usr/ubuntu/hadoop/index.xml
henry@s201:~$ hdfs dfs -ls /usr/ubuntu/hadoop
henry@s201:~$
