The error "No space left on device" usually means either disk space or inodes are exhausted.
Checking the disk space (df -h), we see only 6.1MB is used, meaning there is plenty of free space (1.9GB available).
Checking inodes (df -i), we see all 2048 inodes are used (IUsed = 2048, IFree = 0), meaning no new files can be created even though space is available.
Inodes are metadata structures used to track files. Small files or a large number of directories can exhaust inodes before disk space runs out.
Fixing the Issue:
Remove unnecessary small files to free inodes:find /app -type f -exec rm -f {} + Remove unnecessary small files to free inodes:find /app -type f -exec rm -f {} + Remove unnecessary small files to free inodes:find /app -type f -exec rm -f {} + Recreate the filesystem with a higher inode count:bashmkfs.ext4 -N 500000 /dev/vdb Recreate the filesystem with a higher inode count:bashmkfs.ext4 -N 500000 /dev/vdb Recreate the filesystem with a higher inode count:bashmkfs.ext4 -N 500000 /dev/vdb Recreate the filesystem with a higher inode count:bashmkfs.ext4 -N 500000 /dev/vdb References:
Filesystem Inodes - Linux Documentation