...
You should see something similar to the following:
home:knoxshell-0.12.0 larry$ ls -ltotal 296-rw-r--r--@ 1 larry staff 71714 Mar 14 14:06 LICENSE -rw-r--r--@ 1 larry staff 164 Mar 14 14:06 NOTICE -rw-r--r--@ 1 larry staff 71714 Mar 15 20:04 README drwxr-xr-x@ 12 larry staff 408 Mar 15 21:24 bin drwxr--r--@ 3 larry staff 102 Mar 14 14:06 conf drwxr-xr-x+ 3 larry staff 102 Mar 15 12:41 logs drwxr-xr-x@ 18 larry staff 612 Mar 14 14:18 samples
Directory | Description |
|---|---|
bin | contains the main knoxshell jar and related shell scripts |
conf | only contains log4j config |
logs | contains the knoxshell.log file |
samples | has numerous examples to help you get started |
...
NOTE: if you see errors related to SSL and PKIX your truststore is not properly setup
Execute a Sample Script
Execute the an example script from the {GATEWAY_CLIENT_HOME}/samples directory - for instance:
bin/knoxshell.sh
...
samples/ExampleWebHdfsLs.groovy
home:knoxshell-0.12.0
...
larry$
...
bin/knoxshell.sh
...
samples/ExampleWebHdfsLs.groovy
...
Enter
...
username:
...
guest
...
Enter
...
password:
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[app-logs,
...
apps,
...
mapred,
...
mr-history,
...
tmp,
...
user]
...
At this point, you should have seen something similar to the above output - probably with different directories listed. You should get the idea from the above. Take a look at the sample that we ran above:
import groovy.json.JsonSlurper
import org.apache.hadoop.gateway.shell.Hadoop
import org.apache.hadoop.gateway.shell.hdfs.Hdfs
import org.apache.hadoop.gateway.shell.Credentials
gateway = "https://localhost:8443/gateway/sandbox"
credentials = new Credentials()
credentials.add("ClearInput", "Enter username: ", "user")
.add("HiddenInput", "Enter pas" + "sword: ", "pass")
credentials.collect()
username = credentials.get("user").string()
pass = credentials.get("pass").string()
session = Hadoop.login( gateway, username, pass )
text = Hdfs.ls( session ).dir( "/" ).now().string
json = (new JsonSlurper()).parseText( text )
println json.FileStatuses.FileStatus.pathSuffix
session.shutdown()
Some things to note about this sample:
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