![]() Using the HttpFS gateway to access HDFS from behind a firewall Managing HDFS through the HDFS Shell Commandsįrom the command line using simple Linux-like file system commands, as well as through a web interface, called WebHDFS This chapter also shows how to perform maintenance tasks such as periodically balancing the HDFS data to distribute it evenly across the cluster, as well as how to gain additional space in HDFS when necessary. The chapter shows how HDFS permissions work and how to grant and revoke space quotas on HDFS directories.īesides the management of users and their HDFS space quotas, there are other aspects of HDFS that you need to manage. Managing HDFS users by granting them appropriate permissions and allocating HDFS space quotas to users are some of the common user-related administrative tasks you’ll perform on a regular basis. Although you can access HDFS in multiple ways, the command line is the most common way to administer HDFS storage. Working with HDFS is one of the most common tasks for someone administering a Hadoop cluster. Network driver, again with their approximate equivalents to docker daemon.Managing HDFS storage (including rebalancing of data) The following arguments can be passed to docker network create for any Set a custom prefix for container interfaces The following are those options and theĮquivalent docker daemon flags used for docker0 bridge: Optionīridge name to be used when creating the Linux bridgeĬom._ip_masqueradeĮnable or Disable Inter Container ConnectivityĬom._binding_ipv4Ĭom._iface_prefix bridge) hasĪdditional options that can be passed. ![]() When creating a custom network, the default network driver (i.e. If they do, the network createįails and Engine returns an error. ![]() This example adds the busybox container to the mynet network: When you start a container, use the -network flag to connect it to a network. ![]() Subnet in CIDR format that represents a network segment IPv4 or IPv6 Gateway for the master subnet The network from which to copy the configuration Options Name, shorthandĪuxiliary IPv4 or IPv6 addresses used by Network driver You canĮither use dnsrr endpoint mode with an external load balancer, or use multipleįor more information about different endpoint modes.įor example uses of this command, refer to the examples section below. Need more than 256 IP addresses, do not increase the IP block size. You to 256 IP addresses, when you create networks using the default VIP-basedĮndpoint-mode. You should create overlay networks with /24 blocks (the default), which limits The Docker daemon attempts to identify namingĬonflicts but this is not guaranteed. The -attachable option used in the example above disables this restriction,Īnd allows for both swarm services and manually started containers to attach to To access the network stack of a swarm service. This restriction is added to prevent someone that has access toĪ non-manager node in the swarm cluster from running a container that is able $ docker network create -scope =swarm -attachable -d overlay my-multihost-networkīy default, swarm-scoped networks do not allow manually started containers toīe attached. ![]()
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