Cannot create a new filesystem

[biett0]

Hi all, I created a new project by importing glusterfs-java-filesystem-1.0.4.jar, libgfapi-jni-1.0.4.jar and hawtjni-runtime-1.9.jar jars, and by following the Example.java class, but I get the following message error:

Exception in thread "main" java.lang.UnsatisfiedLinkError: Could not load library. Reasons: [no libgfapi-jni in java.library.path] at org.fusesource.hawtjni.runtime.Library.doLoad(Library.java:182) at org.fusesource.hawtjni.runtime.Library.load(Library.java:140) at com.peircean.libgfapi_jni.internal.GLFS.(GLFS.java:52) at com.peircean.glusterfs.GlusterFileSystemProvider.glfsNew(GlusterFileSystemProvider.java:70) at com.peircean.glusterfs.GlusterFileSystemProvider.newFileSystem(GlusterFileSystemProvider.java:43) at java.nio.file.FileSystems.newFileSystem(FileSystems.java:326) at java.nio.file.FileSystems.newFileSystem(FileSystems.java:276) at com.gpi.gluster.GlusterConnector.main(GlusterConnector.java:50)

Any idea? Thank you very much in advance!

[louiszuckerman]

You need to have the libgfapi C library installed, usually from your distro's glusterfs packages.

[biett0]

Thank you very much for you reply, so I think is mandatory a unix/linux environment, not windows right?

[louiszuckerman]

If the libgfapi C library works on windows, then the libgfapi-jni library could be built to link with it. I don't know if libgfapi supports windows.

[biett0]

Thank you very much! I installed libgfapi on linux machine and tried to create a new file (not existing), but seems it's not working. No error log on gluster machine.

gluster://10.192.2.6:myvolume/test2 Cannot create file! java.nio.file.FileAlreadyExistsException: /test2 at com.peircean.glusterfs.GlusterFileChannel.init(GlusterFileChannel.java:78)

[louiszuckerman]

I haven't worked on this project in a few years so I may not be much help here. I would check the following...

1. Ensure the file does not already exist
2. Check the permissions on the gluster volume & the glusterd service. Last time I worked on this, you had to do a couple of steps on gluster to allow "insecure" connections like from this java library, and also set the mode to 0777 on the gluster volume root directory. See this script for details of how to set up permissions for your volume to allow Java clients.
3. Test with a native glusterfs FUSE client to ensure your volume is working properly.

Good luck.

[eskuai]

Hi @louiszuckerman

I am trying to apply the gluster library on k8s running pod And i've upgrade dockerio/openjdk:8 with the following dockerfile:

FROM docker.io/openjdk:8 
RUN apt-get update
RUN apt-get install glusterfs-server -y

I think that installing glusterfs-server , commons are included ...

Into the pod we find :

root@67b0ae436f25:/usr/include/glusterfs# ls
api           cluster-syncop.h  defaults.h       gfchangelog        glusterfs.h    libglusterfs-messages.h  mem-types.h           rot-buffs.h  strfd.h                        trie.h
byte-order.h  common-utils.h    dict.h           gfdb               graph-utils.h  list.h                   options.h             rpc          syncop-utils.h                 tw.h
call-stub.h   compat-errno.h    event-history.h  gidcache.h         hashfn.h       lkowner.h                parse-utils.h         run.h        syncop.h                       upcall-utils.h
changelog.h   compat-uuid.h     event.h          glfs-message-id.h  iatt.h         locking.h                quota-common-utils.h  server       syscall.h                      xlator.h
checksum.h    compat.h          fd-lk.h          globals.h          inode.h        logging.h                rbthash.h             stack.h      template-component-messages.h  y.tab.h
circ-buff.h   daemon.h          fd.h             glusterfs-acl.h    iobuf.h        lvm-defaults.h           refcount.h            statedump.h  timer.h
client_t.h    default-args.h    gf-dirent.h      glusterfs-fops.h   latency.h      mem-pool.h               revision.h            store.h      timespec.h

And

root@67b0ae436f25:~# find / -name libgfapi* -print
find: ‘/proc/1/map_files’: Operation not permitted
find: ‘/proc/19/map_files’: Operation not permitted
/usr/lib/x86_64-linux-gnu/libgfapi.so
/usr/lib/x86_64-linux-gnu/libgfapi.so.0
/usr/lib/x86_64-linux-gnu/libgfapi.la
/usr/lib/x86_64-linux-gnu/libgfapi.so.0.0.0

Do we need to config GLFS_HOME , which dicrectory?? export GLFS_HOME=/usr/lib/x86_64-linux-gnu

Running glusterfs example into a pod, we got the following error:

Picked up JAVA_TOOL_OPTIONS: -Xmx1024m -Xms1024m -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -Duser.timezone=Europe/Madrid -XX:-TieredCompilation -XX:TieredStopAtLevel=1 -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -Xverify:none  -XX:+AggressiveOpts -XX:+UseG1GC -XX:+UseStringDeduplication
sun.nio.fs.LinuxFileSystemProvider@1d81eb93
com.sun.nio.zipfs.ZipFileSystemProvider@7291c18f
com.peircean.glusterfs.GlusterFileSystemProvider@34a245ab
gluster://10.0.1.213:gv0/
Exception in thread "main" java.lang.IllegalArgumentException: Failed to initialize glusterfs client: 10.0.1.213:gv0
    at com.peircean.glusterfs.GlusterFileSystemProvider.glfsInit(GlusterFileSystemProvider.java:87)
    at com.peircean.glusterfs.GlusterFileSystemProvider.newFileSystem(GlusterFileSystemProvider.java:47)
    at java.nio.file.FileSystems.newFileSystem(FileSystems.java:326)
    at java.nio.file.FileSystems.newFileSystem(FileSystems.java:276)
    at mk.task.adobe.analitycs.AdobeAnalyticsApplication.writeFile2Gluster(AdobeAnalyticsApplication.java:56)
    at mk.task.adobe.analitycs.AdobeAnalyticsApplication.main(AdobeAnalyticsApplication.java:32)

The code is:

 public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException {
        Properties properties = new Properties();
        properties.load(Example.class.getClassLoader().getResourceAsStream("example.properties"));
        String vagrantBox ="10.0.1.213" ;// properties.getProperty("glusterfs.server");
        String volname ="gv0" ;//properties.getProperty("glusterfs.volume");
        System.out.println(getProvider("gluster").toString());
        String mountUri = "gluster://" + vagrantBox + ":" + volname + "/";
        String testUri = "gluster://" + vagrantBox + ":" + volname + "/baz";
        Path mountPath = Paths.get(new URI(mountUri));
        // Failed to run the following
        --> FileSystem fileSystem = FileSystems.newFileSystem(new URI(mountUri), null);<--
        FileStore store = fileSystem.getFileStores().iterator().next();

But, running from bash shell,

[ec2-user@k8s-master glusterfs-java-filesystem-example]$ mvn exec:exec
[INFO] Scanning for projects...
[INFO]
[INFO] ------< com.peircean.glusterfs:glusterfs-java-filesystem-example >------
[INFO] Building glusterfs-java-filesystem-example 1.0.5-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- exec-maven-plugin:1.2.1:exec (default-cli) @ glusterfs-java-filesystem-example ---
sun.nio.fs.LinuxFileSystemProvider@2503dbd3
com.sun.nio.zipfs.ZipFileSystemProvider@4b67cf4d
com.peircean.glusterfs.GlusterFileSystemProvider@7ea987ac
com.peircean.glusterfs.GlusterFileSystemProvider@7ea987ac
TOTAL SPACE: 934953332736
USABLE SPACE: 887356583936
UNALLOCATED SPACE: 934873358336
gluster://10.0.1.213:gv0
class com.peircean.glusterfs.GlusterPath
/baz
gluster://10.0.1.213:gv0
File exists, created at 2019-11-04T16:41:14Z
SIZE: 13
Hello, world! == Hello, world!
Last modified: 2019-11-04T17:04:27Z (should be now)
Can read & write file
Can't execute file, that's good.

can we install the gluster client into all k8s nodes?