hdfs: support kerberos authentication #42

2021-01-16 18:52:08 +03:00 · 2021-01-16 18:52:08 +03:00 · b569dc11a0
commit b569dc11a0
parent df4e6079f1
13 changed files with 269 additions and 16 deletions
--- a/backend/hdfs/fs.go
+++ b/backend/hdfs/fs.go
@ -7,10 +7,15 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"os/user"
 	"path"
+	"strings"
 	"time"

 	"github.com/colinmarc/hdfs/v2"
+	krb "github.com/jcmturner/gokrb5/v8/client"
+	"github.com/jcmturner/gokrb5/v8/config"
+	"github.com/jcmturner/gokrb5/v8/credentials"
 	"github.com/rclone/rclone/fs"
 	"github.com/rclone/rclone/fs/config/configmap"
 	"github.com/rclone/rclone/fs/config/configstruct"
@ -27,6 +32,49 @@ type Fs struct {
 	client   *hdfs.Client
 }

+// copy-paste from https://github.com/colinmarc/hdfs/blob/master/cmd/hdfs/kerberos.go
+func getKerberosClient() (*krb.Client, error) {
+	configPath := os.Getenv("KRB5_CONFIG")
+	if configPath == "" {
+		configPath = "/etc/krb5.conf"
+	}
+
+	cfg, err := config.Load(configPath)
+	if err != nil {
+		return nil, err
+	}
+
+	// Determine the ccache location from the environment, falling back to the
+	// default location.
+	ccachePath := os.Getenv("KRB5CCNAME")
+	if strings.Contains(ccachePath, ":") {
+		if strings.HasPrefix(ccachePath, "FILE:") {
+			ccachePath = strings.SplitN(ccachePath, ":", 2)[1]
+		} else {
+			return nil, fmt.Errorf("unusable ccache: %s", ccachePath)
+		}
+	} else if ccachePath == "" {
+		u, err := user.Current()
+		if err != nil {
+			return nil, err
+		}
+
+		ccachePath = fmt.Sprintf("/tmp/krb5cc_%s", u.Uid)
+	}
+
+	ccache, err := credentials.LoadCCache(ccachePath)
+	if err != nil {
+		return nil, err
+	}
+
+	client, err := krb.NewFromCCache(ccache, cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	return client, nil
+}
+
 // NewFs constructs an Fs from the path
 func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, error) {
 	opt := new(Options)
@ -35,11 +83,26 @@ func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, e
 		return nil, err
 	}

-	client, err := hdfs.NewClient(hdfs.ClientOptions{
+	options := hdfs.ClientOptions{
 		Addresses:           []string{opt.Namenode},
-		User:                opt.Username,
 		UseDatanodeHostname: false,
-	})
+	}
+
+	if opt.ServicePrincipalName != "" {
+		options.KerberosClient, err = getKerberosClient()
+		if err != nil {
+			return nil, fmt.Errorf("Problem with kerberos authentication: %s", err)
+		}
+		options.KerberosServicePrincipleName = opt.ServicePrincipalName
+
+		if opt.DataTransferProtection != "" {
+			options.DataTransferProtection = opt.DataTransferProtection
+		}
+	} else {
+		options.User = opt.Username
+	}
+
+	client, err := hdfs.NewClient(options)
 	if err != nil {
 		return nil, err
 	}
--- a/backend/hdfs/hdfs.go
+++ b/backend/hdfs/hdfs.go
@ -32,6 +32,32 @@ func init() {
 				Value: "root",
 				Help:  "Connect to hdfs as root",
 			}},
+		}, {
+			Name: "service_principal_name",
+			Help: `Kerberos service principal name for the namenode
+
+Enables KERBEROS authentication. Specifies the Service Principal Name
+(<SERVICE>/<FQDN>) for the namenode.`,
+			Required: false,
+			Examples: []fs.OptionExample{{
+				Value: "hdfs/namenode.hadoop.docker",
+				Help:  "Namenode running as service 'hdfs' with FQDN 'namenode.hadoop.docker'.",
+			}},
+			Advanced: true,
+		}, {
+			Name: "data_transfer_protection",
+			Help: `Kerberos data transfer protection: authentication|integrity|privacy
+
+Specifies whether or not authentication, data signature integrity
+checks, and wire encryption is required when communicating the the
+datanodes. Possible values are 'authentication', 'integrity' and
+'privacy'. Used only with KERBEROS enabled.`,
+			Required: false,
+			Examples: []fs.OptionExample{{
+				Value: "privacy",
+				Help:  "Ensure authentication, integrity and encryption enabled.",
+			}},
+			Advanced: true,
 		}, {
 			Name:     config.ConfigEncoding,
 			Help:     config.ConfigEncodingHelp,
@ -46,6 +72,8 @@ func init() {
 type Options struct {
 	Namenode               string               `config:"namenode"`
 	Username               string               `config:"username"`
+	ServicePrincipalName   string               `config:"service_principal_name"`
+	DataTransferProtection string               `config:"data_transfer_protection"`
 	Enc                    encoder.MultiEncoder `config:"encoding"`
 }

--- a/docs/content/hdfs.md
+++ b/docs/content/hdfs.md
@ -185,6 +185,38 @@ hadoop user name

 Here are the advanced options specific to hdfs (Hadoop distributed file system).

+#### --hdfs-service-principal-name
+
+Kerberos service principal name for the namenode
+
+Enables KERBEROS authentication. Specifies the Service Principal Name
+(SERVICE>/<FQDN>) for the namenode.
+
+- Config:      service_principal_name
+- Env Var:     RCLONE_HDFS_SERVICE_PRINCIPAL_NAME
+- Type:        string
+- Default:     ""
+- Examples:
+    - "hdfs/namenode.hadoop.docker"
+        - Namenode running as service 'hdfs' with FQDN 'namenode.hadoop.docker'.
+
+#### --hdfs-data-transfer-protection
+
+Kerberos data transfer protection: authentication|integrity|privacy
+
+Specifies whether or not authentication, data signature integrity
+checks, and wire encryption is required when communicating the the
+datanodes. Possible values are 'authentication', 'integrity' and
+'privacy'. Used only with KERBEROS enabled.
+
+- Config:      data_transfer_protection
+- Env Var:     RCLONE_HDFS_DATA_TRANSFER_PROTECTION
+- Type:        string
+- Default:     ""
+- Examples:
+    - "privacy"
+        - Ensure authentication, integrity and encryption enabled.
+
 #### --hdfs-encoding

 This sets the encoding for the backend.
--- a/fstest/testserver/images/test-hdfs/Dockerfile
+++ b/fstest/testserver/images/test-hdfs/Dockerfile
@ -3,12 +3,11 @@ FROM debian:stretch

 RUN apt-get update \
    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends openjdk-8-jdk \
+                                      net-tools curl python krb5-user krb5-kdc krb5-admin-server \
    && rm -rf /var/lib/apt/lists/*

 ENV JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/

-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends net-tools curl python
-
 ENV HADOOP_VERSION 3.2.1
 ENV HADOOP_URL https://www.apache.org/dist/hadoop/common/hadoop-$HADOOP_VERSION/hadoop-$HADOOP_VERSION.tar.gz
 RUN set -x \
@ -37,6 +36,10 @@ ADD kms-site.xml     /etc/hadoop/kms-site.xml
 ADD mapred-site.xml  /etc/hadoop/mapred-site.xml
 ADD yarn-site.xml    /etc/hadoop/yarn-site.xml

+ADD krb5.conf        /etc/
+ADD kdc.conf         /etc/krb5kdc/
+RUN echo '*/admin@KERBEROS.RCLONE *' > /etc/krb5kdc/kadm5.acl
+
 ADD run.sh /run.sh
 RUN chmod a+x /run.sh
 CMD ["/run.sh"]
--- a/fstest/testserver/images/test-hdfs/README.md
+++ b/fstest/testserver/images/test-hdfs/README.md
@ -26,7 +26,32 @@ cd backend/hdfs
 GO111MODULE=on go test -v
 ```

-stop docker image:
-```
-docker kill rclone-hdfs
-```
+hdfs logs will be available in `.stdout.log` and `.stderr.log`
+
+# Kerberos
+
+test can be run against kerberos-enabled hdfs
+
+1. configure local krb5.conf
+    ```
+    [libdefaults]
+        default_realm = KERBEROS.RCLONE
+    [realms]
+        KERBEROS.RCLONE = {
+            kdc = localhost
+        }
+    ```
+
+2. enable kerberos in remote configuration
+    ```
+    [TestHdfs]
+    ...
+    service_principal_name = hdfs/localhost
+    data_transfer_protection = privacy
+    ```
+
+3. run test
+    ```
+    cd backend/hdfs
+    KERBEROS=true GO111MODULE=on go test -v
+    ```
--- a/fstest/testserver/images/test-hdfs/core-site.xml
+++ b/fstest/testserver/images/test-hdfs/core-site.xml
@ -3,4 +3,10 @@
    <property><name>hadoop.http.staticuser.user</name><value>root</value></property>
    <property><name>hadoop.proxyuser.root.groups</name><value>root,nogroup</value></property>
    <property><name>hadoop.proxyuser.root.hosts</name><value>*</value></property>
+    <!-- KERBEROS BEGIN -->
+    <property><name>hadoop.security.authentication</name><value>kerberos</value></property>
+    <property><name>hadoop.security.authorization</name><value>true</value></property>
+    <property><name>hadoop.rpc.protection</name><value>integrity</value></property>
+    <property><name>hadoop.user.group.static.mapping.overrides</name><value>user=supergroup</value></property>
+    <!-- KERBEROS END -->
 </configuration>
--- a/fstest/testserver/images/test-hdfs/hdfs-site.xml
+++ b/fstest/testserver/images/test-hdfs/hdfs-site.xml
@ -11,4 +11,21 @@
    <property><name>dfs.namenode.servicerpc-bind-host</name><value>0.0.0.0</value></property>
    <property><name>dfs.replication</name><value>2</value></property>
    <property><name>nfs.dump.dir</name><value>/tmp</value></property>
+    <!-- KERBEROS BEGIN -->
+    <property><name>ignore.secure.ports.for.testing</name><value>true</value></property>
+    <property><name>dfs.safemode.extension</name><value>0</value></property>
+    <property><name>dfs.block.access.token.enable</name><value>true</value></property>
+
+    <property><name>dfs.encrypt.data.transfer</name><value>true</value></property>
+    <property><name>dfs.encrypt.data.transfer.algorithm</name><value>rc4</value></property>
+    <property><name>dfs.encrypt.data.transfer.cipher.suites</name><value>AES/CTR/NoPadding</value></property>
+
+    <property><name>dfs.namenode.kerberos.principal</name>          <value>hdfs/_HOST@KERBEROS.RCLONE</value></property>
+    <property><name>dfs.web.authentication.kerberos.principal</name><value>HTTP/_HOST@KERBEROS.RCLONE</value></property>
+    <property><name>dfs.datanode.kerberos.principal</name>          <value>hdfs/_HOST@KERBEROS.RCLONE</value></property>
+
+    <property><name>dfs.namenode.keytab.file</name>              <value>/etc/hadoop/kerberos.key</value></property>
+    <property><name>dfs.web.authentication.kerberos.keytab</name><value>/etc/hadoop/kerberos.key</value></property>
+    <property><name>dfs.datanode.keytab.file</name>              <value>/etc/hadoop/kerberos.key</value></property>
+    <!-- KERBEROS END -->
 </configuration>
--- a/fstest/testserver/images/test-hdfs/kdc.conf
+++ b/fstest/testserver/images/test-hdfs/kdc.conf
@ -0,0 +1,4 @@
+[realms]
+    KERBEROS.RCLONE = {
+        acl_file = /etc/krb5kdc/kadm5.acl
+    }
--- a/fstest/testserver/images/test-hdfs/krb5.conf
+++ b/fstest/testserver/images/test-hdfs/krb5.conf
@ -0,0 +1,10 @@
+[libdefaults]
+    default_realm = KERBEROS.RCLONE
+    dns_lookup_realm = false
+    dns_lookup_kdc = false
+    forwardable = true
+    proxiable = true
+[realms]
+    KERBEROS.RCLONE = {
+        kdc = localhost
+    }
--- a/fstest/testserver/images/test-hdfs/run.sh
+++ b/fstest/testserver/images/test-hdfs/run.sh
@ -1,5 +1,30 @@
 #!/bin/bash

+KERBEROS=${KERBEROS-"false"}
+
+if [ $KERBEROS = "true" ]; then
+    echo prepare kerberos
+    ADMIN_PASSWORD="kerberos"
+    USER_PASSWORD="user"
+
+    echo -e "$ADMIN_PASSWORD\n$ADMIN_PASSWORD" | kdb5_util -r "KERBEROS.RCLONE" create -s
+    echo -e "$ADMIN_PASSWORD\n$ADMIN_PASSWORD" | kadmin.local -q "addprinc hadoop/admin"
+    echo -e "$USER_PASSWORD\n$USER_PASSWORD"   | kadmin.local -q "addprinc user"
+    kadmin.local -q 'addprinc -randkey hdfs/localhost'
+    kadmin.local -q 'addprinc -randkey hdfs/rclone-hdfs'
+    kadmin.local -q 'addprinc -randkey HTTP/localhost'
+    kadmin.local -p hadoop/admin -q "ktadd -k /etc/hadoop/kerberos.key hdfs/localhost hdfs/rclone-hdfs HTTP/localhost"
+    service krb5-kdc restart
+    echo -e "$USER_PASSWORD\n" | kinit user
+    klist
+    echo kerberos ready
+else
+    echo drop kerberos from configuration files
+    sed -i '/KERBEROS BEGIN/,/KERBEROS END/d' /etc/hadoop/core-site.xml
+    sed -i '/KERBEROS BEGIN/,/KERBEROS END/d' /etc/hadoop/hdfs-site.xml
+fi
+
+
 echo format namenode
 hdfs namenode -format test

--- a/fstest/testserver/init.d/TestHdfs
+++ b/fstest/testserver/init.d/TestHdfs
@ -3,19 +3,32 @@
 set -e

 NAME=rclone-hdfs
+KERBEROS=${KERBEROS-"false"}

 . $(dirname "$0")/docker.bash

 start() {
-    docker run --rm -d --name "rclone-hdfs" -p 127.0.0.1:9866:9866 -p 127.0.0.1:8020:8020 --hostname "rclone-hdfs" rclone/test-hdfs
+    docker run --rm -d --name "rclone-hdfs" \
+        --hostname "rclone-hdfs" \
+        -e "KERBEROS=$KERBEROS"  \
+        -p 127.0.0.1:9866:9866   \
+        -p 127.0.0.1:8020:8020   \
+        -p 127.0.0.1:750:750     \
+        -p 127.0.0.1:88:88       \
+        rclone/test-hdfs
    sleep 10

+    if [ $KERBEROS = "true" ]; then
+        docker cp rclone-hdfs:/tmp/krb5cc_0 /tmp/krb5cc_`id -u`
+    fi
+
    echo type=hdfs
    echo namenode=127.0.0.1:8020
    echo username=root
 }
 stop() {
    if status ; then
+        docker logs $NAME > .stdout.log 2> .stderr.log
        docker kill $NAME
        echo "$NAME stopped"
    fi
--- a/go.mod
+++ b/go.mod
@ -18,7 +18,7 @@ require (
 	github.com/billziss-gh/cgofuse v1.4.0
 	github.com/buengese/sgzip v0.1.0
 	github.com/calebcase/tmpfile v1.0.2 // indirect
-	github.com/colinmarc/hdfs/v2 v2.1.1
+	github.com/colinmarc/hdfs/v2 v2.2.0
 	github.com/coreos/go-semver v0.3.0
 	github.com/dropbox/dropbox-sdk-go-unofficial v5.6.0+incompatible
 	github.com/gabriel-vasile/mimetype v1.1.1
@ -26,6 +26,7 @@ require (
 	github.com/google/go-querystring v1.0.0 // indirect
 	github.com/hanwen/go-fuse/v2 v2.0.3
 	github.com/iguanesolutions/go-systemd/v5 v5.0.0
+	github.com/jcmturner/gokrb5/v8 v8.4.2
 	github.com/jlaffaye/ftp v0.0.0-20201112195030-9aae4d151126
 	github.com/jzelinskie/whirlpool v0.0.0-20201016144138-0675e54bb004
 	github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0 // indirect
@ -57,7 +58,7 @@ require (
 	go.etcd.io/bbolt v1.3.5
 	go.uber.org/zap v1.16.0 // indirect
 	goftp.io/server v0.4.0
-	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897
+	golang.org/x/crypto v0.0.0-20201112155050-0c6587e931a9
 	golang.org/x/net v0.0.0-20201029055024-942e2f445f3c
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
--- a/go.sum
+++ b/go.sum
@ -142,6 +142,8 @@ github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:z
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/colinmarc/hdfs/v2 v2.1.1 h1:x0hw/m+o3UE20Scso/KCkvYNc9Di39TBlCfGMkJ1/a0=
 github.com/colinmarc/hdfs/v2 v2.1.1/go.mod h1:M3x+k8UKKmxtFu++uAZ0OtDU8jR3jnaZIAc6yK4Ue0c=
+github.com/colinmarc/hdfs/v2 v2.2.0 h1:4AaIlTq+/sWmeqYhI0dX8bD4YrMQM990tRjm636FkGM=
+github.com/colinmarc/hdfs/v2 v2.2.0/go.mod h1:Wss6n3mtaZyRwWaqtSH+6ge01qT0rw9dJJmvoUnIQ/E=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
@ -283,6 +285,9 @@ github.com/gopherjs/gopherjs v0.0.0-20181103185306-d547d1d9531e/go.mod h1:wJfORR
 github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/gorilla/mux v1.7.3/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
+github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
+github.com/gorilla/sessions v1.2.0/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
+github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
 github.com/gorilla/websocket v0.0.0-20170926233335-4201258b820c/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
@ -310,6 +315,8 @@ github.com/hashicorp/go-uuid v0.0.0-20180228145832-27454136f036/go.mod h1:6SBZvO
 github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/go-uuid v1.0.1 h1:fv1ep09latC32wFoVwnqcnKJGnMSdBanPczbHAYm1BE=
 github.com/hashicorp/go-uuid v1.0.1/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
+github.com/hashicorp/go-uuid v1.0.2 h1:cfejS+Tpcp13yd5nYHWDI6qVCny6wyX2Mt5SGur2IGE=
+github.com/hashicorp/go-uuid v1.0.2/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA0oac0k90=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
@ -330,8 +337,24 @@ github.com/iguanesolutions/go-systemd/v5 v5.0.0/go.mod h1:VPlzL6z0rXd3HU7oLkMoEq
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/influxdata/influxdb1-client v0.0.0-20191209144304-8bf82d3c094d/go.mod h1:qj24IKcXYK6Iy9ceXlo3Tc+vtHo9lIhSX5JddghvEPo=
+github.com/jcmturner/aescts/v2 v2.0.0 h1:9YKLH6ey7H4eDBXW8khjYslgyqG2xZikXP0EQFKrle8=
+github.com/jcmturner/aescts/v2 v2.0.0/go.mod h1:AiaICIRyfYg35RUkr8yESTqvSy7csK90qZ5xfvvsoNs=
+github.com/jcmturner/dnsutils/v2 v2.0.0 h1:lltnkeZGL0wILNvrNiVCR6Ro5PGU/SeBvVO/8c/iPbo=
+github.com/jcmturner/dnsutils/v2 v2.0.0/go.mod h1:b0TnjGOvI/n42bZa+hmXL+kFJZsFT7G4t3HTlQ184QM=
 github.com/jcmturner/gofork v0.0.0-20180107083740-2aebee971930 h1:v4CYlQ+HeysPHsr2QFiEO60gKqnvn1xwvuKhhAhuEkk=
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@ -669,6 +692,7 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@ -678,6 +702,8 @@ golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0 h1:hb9wdF1z5waM+dSIICn1l0
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