Docker 上的 DataStax Enterprise：由于 /hadoop/conf 目录不可写而无法启动

Posted 2023-03-22

【中文标题】Docker 上的 DataStax Enterprise：由于 /hadoop/conf 目录不可写而无法启动

【英文标题】：DataStax Enterprise on Docker: fails to start due to /hadoop/conf directory not being writable

【发布时间】：2017-03-26 20:10:35

【问题描述】：

我关注了DataStax's guide on best practices for using DSE with Docker，但我在使用 DataStax 提供的所有默认设置脚本和 Dockerfile 时遇到了以下错误。

错误日志

Caused by: java.lang.RuntimeException: Failed to save custom DSE Hadoop config
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.writeDseHadoopConfig(CassandraJobConf.java:310) ~[dse-hadoop-5.0.3.jar:5.0.3]
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.writeDseHadoopConfig(CassandraJobConf.java:174) ~[dse-hadoop-5.0.3.jar:5.0.3]
        at com.datastax.bdp.ConfigurationWriterPlugin.onActivate(ConfigurationWriterPlugin.java:20) ~[dse-hadoop-5.0.3.jar:5.0.3]
        at com.datastax.bdp.plugin.PluginManager.initialize(PluginManager.java:377) ~[dse-core-5.0.3.jar:5.0.3]
        at com.datastax.bdp.plugin.PluginManager.activateDirect(PluginManager.java:306) ~[dse-core-5.0.3.jar:5.0.3]
        ... 7 common frames omitted
Caused by: java.io.IOException: Directory not writable: /opt/dse/resources/hadoop/conf
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.saveConfiguration(CassandraJobConf.java:466) ~[dse-hadoop-5.0.3.jar:5.0.3]
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.saveDseHadoopConfiguration(CassandraJobConf.java:345) ~[dse-hadoop-5.0.3.jar:5.0.3]
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.writeDseHadoopConfig(CassandraJobConf.java:300) ~[dse-hadoop-5.0.3.jar:5.0.3]
        ... 11 common frames omitted
Unable to start DSE server: Unable to activate plugin com.datastax.bdp.ConfigurationWriterPlugin
com.datastax.bdp.plugin.PluginManager$PluginActivationException: Unable to activate plugin com.datastax.bdp.ConfigurationWriterPlugin
        at com.datastax.bdp.plugin.PluginManager.activateDirect(PluginManager.java:327)
        at com.datastax.bdp.plugin.PluginManager.activate(PluginManager.java:259)
        at com.datastax.bdp.plugin.PluginManager.activate(PluginManager.java:169)
        at com.datastax.bdp.plugin.PluginManager.preStart(PluginManager.java:77)
        at com.datastax.bdp.server.DseDaemon.preStart(DseDaemon.java:490)
        at com.datastax.bdp.server.DseDaemon.start(DseDaemon.java:462)
        at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:583)
        at com.datastax.bdp.DseModule.main(DseModule.java:91)
Caused by: java.lang.RuntimeException: Failed to save custom DSE Hadoop config
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.writeDseHadoopConfig(CassandraJobConf.java:310)
        at com.datastax.bdp.hadoop.mapred.CassandraJobConf.writeDseHadoopConfig(CassandraJobConf.java:174)
        at com.datastax.bdp.ConfigurationWriterPlugin.onActivate(ConfigurationWriterPlugin.java:20)
        at com.datastax.bdp.plugin.PluginManager.initialize(PluginManager.java:377)
        at com.datastax.bdp.plugin.PluginManager.activateDirect(PluginManager.java:306)
        ... 7 more
Caused by: java.io.IOException: Directory not writable: /opt/dse/resources/hadoop/conf

错误很简单，尝试通过在Dockerfile 中添加一些额外的chmod 调用来解决它，但无济于事。

Dockerfile

# Provided without any warranty, these files are intended
# to accompany the whitepaper about DSE on Docker and are
# not intended for production and are not actively maintained.

# Loosely based on docker-cassandra by the fine folk at Spotify
# -- https://github.com/spotify/docker-cassandra/
# Loosely based on cassandra-docker by the one and only Al Tobey
# -- https://github.com/tobert/cassandra-docker/

# base yourself on any ubuntu 14.04 image containing JDK8
# official Docker Java images are distributed with OpenJDK
# Datastax certifies its product releases specifically
# on the Oracle/Sun JVM, so YMMV with OpenJDK

FROM nimmis/java:oracle-8-jdk

# Avoid ERROR: invoke-rc.d: policy-rc.d denied execution of start.
RUN echo "#!/bin/sh\nexit 0" > /usr/sbin/policy-rc.d

RUN export DEBIAN_FRONTEND=noninteractive && \
    apt-get update && \
    apt-get -y install adduser \
    curl \
    lsb-base \
    procps \
    zlib1g \
    gzip \
    python \
    python-support \
    sysstat \
    ntp bash tree && \
    rm -rf /var/lib/apt/lists/*

# grab gosu for easy step-down from root
RUN curl -o /bin/gosu -SkL "https://github.com/tianon/gosu/releases/download/1.4/gosu-$(dpkg --print-architecture)" \
    && chmod +x /bin/gosu


# DSE tarball can be download into the folder where Dockerfile is
# wget --user=$USER --password=$PASS http://downloads.datastax.com/enterprise/dse-5.0.0-bin.tar.gz
# you may want to replace dse-5.0.0-bin.tar.gz with the corresponding downloaded package name. When
# downloaded, please remove the version number part of the filename (or create a symlink), so the
# resulting file is named dse-bin.tar.gz (that way the docker file itself remains version independent).
#
# DataStax Agent debian package can be downloaded from
# wget --user=$USER --password=$PASS http://debian.datastax.com/enterprise/pool/datastax-agent_6.0.0_all.deb
# you may want to replace the specific version with the corresponding downloaded package name. When
# downloaded, please remove the version number part of the filename (or create a symlink), so the
# resulting file is named datastax-agent_all.deb (that way the docker file itself remains version
# independent).
ADD dse.tar.gz /opt
ADD datastax-agent_all.deb /tmp

ENV DSE_HOME /opt/dse

RUN ln -s /opt/dse* $DSE_HOME

# keep data here
VOLUME /data

# and logs here
VOLUME /logs

VOLUME /opt/dse

# create a dedicated user for running DSE node
RUN groupadd -g 1337 cassandra && \
    useradd -u 1337 -g cassandra -s /bin/bash -d $DSE_HOME cassandra && \
    chown -R cassandra:cassandra /opt/dse* 

RUN chmod r+w -R /opt/dse/

# install the agent
RUN dpkg -i /tmp/datastax-agent_all.deb

# starting node using custom entrypoint that configures paths, interfaces, etc.
COPY scripts/dse-entrypoint /usr/local/bin/
RUN chmod +x /usr/local/bin/dse-entrypoint
ENTRYPOINT ["/usr/local/bin/dse-entrypoint"]

# Running any other DSE/C* command should be done on behalf dse user
# Perform that using a generic command laucher
COPY scripts/dse-cmd-launcher /usr/local/bin/
RUN chmod +x /usr/local/bin/dse-cmd-launcher

# link dse commands to the launcher
RUN for cmd in cqlsh dsetool nodetool dse cassandra-stress; do \
        ln -sf /usr/local/bin/dse-cmd-launcher /usr/local/bin/$cmd ; \
    done

# the detailed list of ports
# http://docs.datastax.com/en/datastax_enterprise/5.0/datastax_enterprise/sec/secConfFirePort.html

# Cassandra
EXPOSE 7000 9042 9160

# Solr
EXPOSE 8983 8984

# Spark
EXPOSE 4040 7080 7081 7077

# Hadoop
EXPOSE 8012 50030 50060 9290

# Hive/Shark
EXPOSE 10000

# Graph

最后可能解决此问题的地方可能是用于在此容器启动时实际启动 DSE 的启动脚本。

DSE 启动脚本（由 Docker 容器在启动时调用）

#!/bin/sh

# Provided without any warranty, these files are intended
# to accompany the whitepaper about DSE on Docker and are 
# not intended for production and are not actively maintained.

# Bind the various services
# These should be updated on every container start

if [ -z $IP ]; then
  IP=`hostname --ip-address`
fi

echo $IP > /data/ip.address

# create directories for holding the node's data, logs, etc.
create_dirs() 
  local base_dir=$1;

  mkdir -p $base_dir/data/commitlog
  mkdir -p $base_dir/data/saved_caches
  mkdir -p $base_dir/data/hints
  mkdir -p $base_dir/logs


# tweak the cassandra config
tweak_cassandra_config() 
  env="$1/cassandra-env.sh"
  conf="$1/cassandra.yaml"

  base_data_dir="/data"

  # Set the cluster name
  if [ -z "$CLUSTER_NAME" ]; then
    printf " - No cluster name provided; skipping.\n"
  else
    printf " - Setting up the cluster name: $CLUSTER_NAME\n"
    regexp="s/Test Cluster/$CLUSTER_NAME/g"
    sed -i -- "$regexp" $conf
  fi

  # Set the commitlog directory, and various other directories
  # These are done only once since the regexep matches will fail on subsequent
  # runs.
  printf " - Setting up directories\n"
  regexp="s|/var/lib/cassandra/|$base_data_dir/|g"
  sed -i -- "$regexp" $conf
  regexp="s/^listen_address:.*/listen_address: $IP/g"
  sed -i -- "$regexp" $conf
  regexp="s/rpc_address:.*/rpc_address: $IP/g"
  sed -i -- "$regexp" $conf

  # seeds
  if [ -z "$SEEDS" ]; then
    printf " - Using own IP address $IP as seed.\n";
    regexp="s/seeds:.*/seeds: \"$IP\"/g";
  else
    printf " - Using seeds: $SEEDS\n";
    regexp="s/seeds:.*/seeds: \"$IP,$SEEDS\"/g"
  fi
  sed -i -- "$regexp" $conf

  # JMX
  echo "JVM_OPTS=\"\$JVM_OPTS -Djava.rmi.server.hostname=127.0.0.1\"" >> $env


tweak_dse_in_sh() 
  # point C* logs dir to the created volume
  sed -i -- "s|/var/log/cassandra|/logs|g" "$1/dse.in.sh"


tweak_spark_config() 
  sed -i -- "s|/var/lib/spark/|/data/spark/|g" "$1/spark-env.sh"
  sed -i -- "s|/var/log/spark/|/logs/spark/|g" "$1/spark-env.sh"
  mkdir -p /data/spark/worker
  mkdir -p /data/spark/rdd
  mkdir -p /logs/spark/worker


tweak_agent_config() 
  [ -d "/var/lib/datastax-agent" ] && cat > /var/lib/datastax-agent/conf/address.yaml <<EOF
stomp_interface: $STOMP_INTERFACE
use_ssl: 0
local_interface: $IP
hosts: ["$IP"]
cassandra_install_location: /opt/dse
cassandra_log_location: /logs
EOF
  chown cassandra:cassandra /var/lib/datastax-agent/conf/address.yaml


setup_node() 
  printf "* Setting up node...\n"
  printf " + Setting up node...\n"

  create_dirs
  tweak_cassandra_config "$DSE_HOME/resources/cassandra/conf"
  tweak_dse_in_sh "$DSE_HOME/bin"
  tweak_spark_config "$DSE_HOME/resources/spark/conf"
  tweak_agent_config
  chown -R cassandra:cassandra /data /logs /conf

  # mark that we tweaked configs
  touch "$DSE_HOME/tweaked_configs"

  printf "Done.\n"


# if marker file doesn't exist, setup node
[ ! -f "$DSE_HOME/tweaked_configs" ] && setup_node

[ -f "/etc/init.d/datastax-agent" ] && /etc/init.d/datastax-agent start

exec gosu cassandra "$DSE_HOME/bin/dse" cassandra -f "$@"

Docker 容器命令行参数

这是我用来通过 Docker 启动单个 DSE 实例的命令行参数：

#!/bin/bash

# Used to start a single DSE node that has both Spark and Cassandra running on it
OPSC_CONTAINER=$1

if [ -z "$OPSC_CONTAINER" ]; then
  echo "usage: start_docker_cluster.sh OPSCContainerName"
  echo "  OPSCContainerName   mandatory name of the container running OpsCenter"
  exit 1
fi

[ -z "$CLUSTER_NAME" ] && CLUSTER_NAME="Test_Cluster"

STOMP_INTERFACE=`docker exec $OPSC_CONTAINER hostname -I`
docker run -p 7080:7080 -p 4040:4040 -p 7077:7077 -p 9042:9042 --link $OPSC_CONTAINER -d -e CLUSTER_NAME="$CLUSTER_NAME" -e STOMP_INTERFACE="$STOMP_INTERFACE" --name dse dse -k -t

-k -t 标志 indicate that we're going to be launching both Hadoop and Spark for this container。我已经删除了-t 标志，即使没有它，仍然会出现这个配置错误。

我需要做什么才能使/opt/dse/resources/hadoop/conf 目录可写，以便 DSE 可以成功启动？

【参考方案1】：

将 'chown -RHh cassandra:cassandra /opt/dse' 添加到入口点脚本解决了我无法写入 /opt/dse/resources/hadoop/conf 的问题。

回复。错误 04:15:04,789 SPARK-WORKER Logging.scala:74 - 无法创建工作目录 /var/lib/spark/worker

检查您的 spark-env.sh，并查看您的目录映射。就我而言，我安装了两个外部卷 - /data 和 /logs。这两个目录都归 cassandra:cassandra 所有。

# This is a base directory for Spark Worker work files.
if [ "x$SPARK_WORKER_DIR" = "x" ]; then
    export SPARK_WORKER_DIR="/data/spark/worker"
fi

if [ "x$SPARK_LOCAL_DIRS" = "x" ]; then
    export SPARK_LOCAL_DIRS="/data/spark/rdd"
fi

# This is a base directory for Spark Worker logs.
if [ "x$SPARK_WORKER_LOG_DIR" = "x" ]; then
   export SPARK_WORKER_LOG_DIR="/logs/spark/worker"
fi

# This is a base directory for Spark Master logs.
if [ "x$SPARK_MASTER_LOG_DIR" = "x" ]; then
   export SPARK_MASTER_LOG_DIR="/logs/spark/master"
fi

此视频展示了在 docker 上运行的全功能 DSE Enterprise：https://vimeo.com/181393134

【参考方案2】：

我在 DSE 启动脚本（由 Docker 容器在启动时调用） 的 setup_node() 部分添加了 chown -RHh cassandra:cassandra /opt/dse，它解决了这个问题。查看chown --help 了解有关这些选项的更多信息。

注意：我现在稍后会收到ERROR 04:15:04,789 SPARK-WORKER Logging.scala:74 - Failed to create work directory /var/lib/spark/worker，但至少我的修复可以让您解决最初的问题。

setup_node() 
  printf "* Setting up node...\n"
  printf " + Setting up node...\n"

  create_dirs
  tweak_cassandra_config "$DSE_HOME/resources/cassandra/conf"
  tweak_dse_in_sh "$DSE_HOME/bin"
  tweak_spark_config "$DSE_HOME/resources/spark/conf"
  tweak_agent_config
  tweak_dse_config "$DSE_HOME/resources/dse/conf"
  chown -R cassandra:cassandra /data /logs /conf

  chown -RHh cassandra:cassandra /opt/dse

  # mark that we tweaked configs
  touch "$DSE_HOME/tweaked_configs"

  printf "Done.\n"

【参考方案3】：

这样做：

我在 DSE 启动脚本的 setup_node() 部分添加了 chown -RHh cassandra:cassandra /opt/dse（由 Docker 容器在启动时调用）

Max 的回答对我有用，但我得到的不是他的问题

Unable to activate plugin com.datastax.bdp.plugin.DseFsPlugin
(...)
java.io.IOException: Failed to create work directory: /var/lib/dsefs

所以我不得不把我的 setup_node() 变成这个

setup_node() 
  printf "* Setting up node...\n"
  printf " + Setting up node...\n"

  create_dirs
  tweak_cassandra_config "$DSE_HOME/resources/cassandra/conf"
  tweak_dse_in_sh "$DSE_HOME/bin"
  tweak_spark_config "$DSE_HOME/resources/spark/conf"
  tweak_agent_config
  chown -R cassandra:cassandra /data /logs /conf

  mkdir /var/lib/dsefs
  chown -RHh cassandra:cassandra /opt/dse /var/lib/dsefs

  # mark that we tweaked configs
  touch "$DSE_HOME/tweaked_configs"

  printf "Done.\n"