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# Test a minimal HDFS cluster with no HA
import ../make-test-python.nix ({ package, lib, ... }:
{
name = "hadoop-hdfs";
nodes = let
coreSite = {
"fs.defaultFS" = "hdfs://namenode:8020";
"hadoop.proxyuser.httpfs.groups" = "*";
"hadoop.proxyuser.httpfs.hosts" = "*";
};
in {
namenode = { pkgs, ... }: {
services.hadoop = {
inherit package;
hdfs = {
namenode = {
enable = true;
openFirewall = true;
formatOnInit = true;
};
httpfs = {
# The NixOS hadoop module only support webHDFS on 3.3 and newer
enable = lib.mkIf (lib.versionAtLeast package.version "3.3") true;
openFirewall = true;
};
};
inherit coreSite;
};
};
datanode = { pkgs, ... }: {
services.hadoop = {
inherit package;
hdfs.datanode = {
enable = true;
openFirewall = true;
dataDirs = [{
type = "DISK";
path = "/tmp/dn1";
}];
};
inherit coreSite;
};
};
};
testScript = ''
start_all()
namenode.wait_for_unit("hdfs-namenode")
namenode.wait_for_unit("network.target")
namenode.wait_for_open_port(8020)
namenode.succeed("ss -tulpne | systemd-cat")
namenode.succeed("cat /etc/hadoop*/hdfs-site.xml | systemd-cat")
namenode.wait_for_open_port(9870)
datanode.wait_for_unit("hdfs-datanode")
datanode.wait_for_unit("network.target")
'' + (if lib.versionAtLeast package.version "3" then ''
datanode.wait_for_open_port(9864)
datanode.wait_for_open_port(9866)
datanode.wait_for_open_port(9867)
datanode.succeed("curl -f http://datanode:9864")
'' else ''
datanode.wait_for_open_port(50075)
datanode.wait_for_open_port(50010)
datanode.wait_for_open_port(50020)
datanode.succeed("curl -f http://datanode:50075")
'' ) + ''
namenode.succeed("curl -f http://namenode:9870")
datanode.succeed("sudo -u hdfs hdfs dfsadmin -safemode wait")
datanode.succeed("echo testfilecontents | sudo -u hdfs hdfs dfs -put - /testfile")
assert "testfilecontents" in datanode.succeed("sudo -u hdfs hdfs dfs -cat /testfile")
'' + lib.optionalString (lib.versionAtLeast package.version "3.3" ) ''
namenode.wait_for_unit("hdfs-httpfs")
namenode.wait_for_open_port(14000)
assert "testfilecontents" in datanode.succeed("curl -f \"http://namenode:14000/webhdfs/v1/testfile?user.name=hdfs&op=OPEN\" 2>&1")
'';
})
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