关于NCC
不是为了技术信息传达，只是将解释给我们年轻人的话题记录下来。
NCC是什么？
NCC是Nutanix Cluster Check的缩写，据称是用于进行Nutanix健康检查的工具。可以通过Prism Element或CVM从CLI执行该工具。
我們可以通過Prism Element進行如下操作。
执行后会有这种感觉
我会在CVM上运行ncc health_checks run_all。它会执行大约171个检查项目，包括CVM、AHV主机、IPMI的IP地址、序列号等内容。我已经小心地排除了它们，如果还有残留，请私下告诉我。我会悄悄将其删除掉…
nutanix@NTNX--A-CVM::~$ ncc health_checks run_all
ncc_version: 3.1.2-84909c57
cluster id:
cluster name: (clusterName)
node with service vm id 6
service vm external ip:
hypervisor address list: [u'']
hypervisor version:
ipmi address list: [u'']
software version:
software changeset ID:
node serial:
rackable unit:
node with service vm id 7
service vm external ip:
hypervisor address list: [u'']
hypervisor version:
ipmi address list: [u'']
software version:
software changeset ID:
node serial:
rackable unit:
node with service vm id 8
service vm external ip:
hypervisor address list: [u'']
hypervisor version:
ipmi address list: [u']
software version:
software changeset ID:
node serial:
rackable unit:
node with service vm id 9
service vm external ip:
hypervisor address list: [u'']
hypervisor version:
ipmi address list: [u'']
software version:
software changeset ID:
node serial:
rackable unit:
Running : health_checks run_all
[==================================================] 100%
/health_checks/hardware_checks/disk_checks/boot_raid_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/sar_checks/ssd_latency_threshold_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/lsi_firmware_rev_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/bmc_bios_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/sas_connectivity_status_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_same_ncc_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/remote_site_checks/remote_site_config_chec
k [ FAIL ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/metadata_mounted_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/vstore_pd_file_co
unt_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/same_hypervisor_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/all_flash_nodes_intermixed_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_services_status [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/fileserver_checks/fileserver_cvm_checks/file_server_status_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cluster_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/cassandra_log_crash_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cpu_aes_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/metro_vstore_syml
inks_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/email_alerts_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/kernel_memory_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/stargate_checks/garbage_egroups_size_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/incomplete_disk_removal_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/storage_container_replication_factor_check[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/host_nic_error_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/sufficient_disk_space_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/protection_domain
_file_conflict_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/host_pingable_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/sspm1633_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/toshiba_pm3_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/cloud_checks/aws_instance_type_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/internal_consiste
ncy_group_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/check_ntp [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/cloud_checks/cloud_remote_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/storage_pool_space_usage_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/sm863_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/cloud_checks/aws_instance_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/remote_site_checks/remote_site_has_virtual
_ip_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/stargate_checks/unresponsive_stargate_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/host_cvm_subnets_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/inode_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/check_vhdx_disks
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/sp_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/m10_gpu_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/metro_availability_checks/metro_automatic_checkpoint_snapshot_che
ck [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/stargate_checks/dedup_auto_disabled_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/vstore_cg_file_co
unt_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/disk_storage_pool_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/m2_intel3520_ssd_status_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/content_cache_dedup_ref_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cluster_services_status [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_same_timezone_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/cassandra_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/cvm_virtual_hardware_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/host_disk_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/mellanox_nic_driver_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/ring_balance_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/cloud_checks/cloud_remote_version_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/host_swap_rate [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/fru_fields_correctness_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/sata_dom_wearout_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/storage_container_space_usage_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/duplicate_cvm_ip_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_connectivity [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/vdisk_count_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/vm_swap_rate [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/snapshot_chain_height_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/hwclock_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/vstore_max_num_of
_vms_supported_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/10gbe_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/fileserver_checks/fileserver_cvm_checks/file_server_protect_statu
s_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_memory_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/metro_availability_checks/backup_snapshots_on_metro_secondary_che
ck [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/nodetool_consistency_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/metro_availability_checks/secondary_metro_pd_in_sync_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/ipmi_checks/ipmi_sensor_threshold_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/remote_site_checks/remote_site_connectivit
y_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/host_cpu_contention [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/snapshot_space_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/stargate_checks/ondisk_dedup_enabled_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/cvm_memory_reservation_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/zkinfo_check_plugin [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/dimm_interop_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/ldap_config_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/pds_share_vms_che
ck [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/remote_support_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/gpu_driver_installed_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/m60_gpu_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/nic_link_down_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/intel_ssd_configuration_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/protected_vms_on_
nutanix_storage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/fileserver_checks/fileserver_cvm_checks/file_server_remote_site_s
tatus_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/backup_schedule_c
heck [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/fio_ecc_errors_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/fileserver_checks/fileserver_cvm_checks/multiple_fsvm_on_single_n
ode_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/factory_config_validation_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/toshiba_pm4_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/pd_clones_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/disk_id_duplicate_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/deleted_file_fd_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/degraded_node_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/remote_site_checks/remote_site_has_correct
_cluster_info_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/zeus_config_ip_address_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/uvm_ide_disk_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/storage_container
_mount_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/quad_nic_driver_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/ssd_firmware_version_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/host_rx_packets_drop [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/vm_checks [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/metro_availability_checks/unsupported_vm_config_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_reboot_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/unreserved_available_space_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/recovery_point_av
ailability_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cvm_memory_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/alert_manager_service_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/metro_availability_checks/data_locality_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/snapshot_file_loc
ation_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/cassandra_log_memory_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/curator_scan_time_elapsed_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/mellanox_nic_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/zkalias_check_plugin [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/nvme_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/remote_site_checks/remote_site_time_sync_c
heck [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/ngt_ca_setup_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/host_connectivity [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/cluster_services_down_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/cloud_checks/check_cloud_gflags [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/m2_micron5100_ssd_status_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/check_vm_pinning_config [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/linked_clones_on_dedup_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/disk_online_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/hostname_resolution_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/unsupported_vm_co
nfig_vstore_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/chassis_cpus_type_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/rsyslog_connectivity_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/vg_space_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/check_erasure_code_config [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/http_proxy_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/remote_stargate_v
ersion_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/sata_controller_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/gflags_diff_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/duplicate_vm_name
s_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/cassandra_keyspace_cf_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/fileserver_checks/fileserver_cvm_checks/file_server_upgrade_task_
stuck_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/cross_hypervisor_
ngt_installed_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/cassandra_checks/cassandra_similar_token_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/stargate_checks/oplog_episode_count_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/file_permission_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/fileserver_checks/fileserver_cvm_checks/multiple_file_server_vers
ions_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/disk_usage_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/sar_checks/hdd_latency_threshold_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/data_protection_checks/protection_domain_checks/aged_third_party_
backup_snapshot_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/sata_dom_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/inter_cvm_connections_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/inter_cvm_ping_latency_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/sar_checks/sar_stats_threshold_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/virtual_ip_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/pm863a_status_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/vm_io_latency_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/intel_ecc_errors_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/auto_support_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/rpo_validation_on_storage_heavy_cluster [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/ipmi_checks/ipmi_sel_correctable_ecc_errors_check
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/aegis_page_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/network_checks/cvm_time_drift_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/dns_server_check [ INFO ]
-------------------------------------------------------------------------------+
/health_checks/stargate_checks/compression_disabled_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hypervisor_checks/orphan_vm_snapshot_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/m10_m60_gpu_mixed_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/disk_checks/disk_smartctl_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/system_checks/check_virtual_ip_is_in_cluster_external_subnet
[ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/ipmi_checks/ipmi_sel_check [ PASS ]
-------------------------------------------------------------------------------+
/health_checks/hardware_checks/ipmi_checks/ipmi_check [ PASS ]
-------------------------------------------------------------------------------+
Detailed information for remote_site_config_check:
Node :
FAIL: Remote site: (RemoteSite Name)
Number of vstores mapped for the local site on the remote site are not same.
Refer to KB 3335 (http://portal.nutanix.com/kb/3335) for details on remote_site_config_check or Recheck with: ncc health_checks data_protection_checks remote_site_checks remote_site_config_check
Detailed information for dns_server_check:
Node :
INFO: Only one name server is configured
Node :
INFO: Only one name server is configured
Node :
INFO: Only one name server is configured
Node :
INFO: Only one name server is configured
Refer to KB 3005 (http://portal.nutanix.com/kb/3005) for details on dns_server_check or Recheck with: ncc health_checks system_checks dns_server_check --cvm_list=,,,
+---------------+
| State | Count |
+---------------+
| Pass | 169 |
| Info | 1 |
| Fail | 1 |
| Total | 171 |
+---------------+
Plugin output written to /home/nutanix/data/logs/ncc-output-latest.log
nutanix@NTNX--A-CVM::~$
在这里，Info告诉我们”DNS服务器的IP地址只设置了一个！”，而Fail则告诉我们”复制的设置有问题！”。
使用旧版NCC时遇到的问题。
最近，我将Nutanix的AOS从5.0.x升级到了5.1.3版本。AOS 5.1.3版本附带了NCC3.1.2，NCC也进行了升级，解决了一个我们一直面临的运维问题。
这个问题是指，即使某个未被CVM使用的网络端口发生断链，也没有被检测出来。在我们的环境中，默认情况下会创建br0，而且我们还创建了br1，虚拟机使用br1进行通信。但是，例如，即使属于br1的网卡的LAN线被拔出，Nutanix方面也无法检测到。只有当我们从负责交换机管理的网络团队那里收到通知，或者在虚拟机上实施的活性监视检测到两者同时掉线时，才能知道端口已经断开连接。我记得当得知这一点时，我想到了”哇，真的吗”。
特别是对于考虑网络隔离的人来说，可能最好使用尽可能新的NCC版本。而且，与其考虑过于复杂的隔离设置，我认为更好的做法是使用br0来实现所有功能，这样更简单。在我们的网络配置中，我们只是勉强实现了这个设置罢了。。。
