实际上，我使用的是Elassandra，它是Cassandra和Elasticsearch的组合。
但是问题可能出在 Cassandra (从日志说)
我有两个加入为单个数据中心DC1的节点。我正在尝试在其中一个节点上安装Kibana。我的Kibana服务器总是说“Kibana服务器尚未准备好”，然后我发现错误与Cassandra一致性级别有关。
我的cassandra system_auth设置为
system_auth
WITH REPLICATION= {'class' : 'SimpleStrategy',
'DC1' :2 };
/usr/share/kibana/bin/kibana -c /etc/kibana/kibana.yml的日志FATAL [exception] org.apache.cassandra.exceptions.UnavailableException: Cannot achieve
consistency level QUORUM :: {"path":"/.kibana_1","query":{"include_type_name":true},"body":"
{\"mappings\":{\"doc\":{\"dynamic\":\"strict\",\"properties\":{\"config\":
{\"dynamic\":\"true\",\"properties\":{\"buildNum\":
{\"type\":\"keyword\"}}},\"migrationVersion\":
{\"dynamic\":\"true\",\"type\":\"object\"},\"type\":{\"type\":\"keyword\"},\"namespace\":
{\"type\":\"keyword\"},\"updated_at\":{\"type\":\"date\"},\"index-pattern\":{\"properties\":
{\"fieldFormatMap\":{\"type\":\"text\"},\"fields\":{\"type\":\"text\"},\"intervalName\":
{\"type\":\"keyword\"},\"notExpandable\":{\"type\":\"boolean\"},\"sourceFilters\":
{\"type\":\"text\"},\"timeFieldName\":{\"type\":\"keyword\"},\"title\":
{\"type\":\"text\"},\"type\":{\"type\":\"keyword\"},\"typeMeta\":
{\"type\":\"keyword\"}}},\"visualization\":{\"properties\":{\"description\":
{\"type\":\"text\"},\"kibanaSavedObjectMeta\":{\"properties\":{\"searchSourceJSON\":
{\"type\":\"text\"}}},\"savedSearchId\":{\"type\":\"keyword\"},\"title\":
{\"type\":\"text\"},\"uiStateJSON\":{\"type\":\"text\"},\"version\":
{\"type\":\"integer\"},\"visState\":{\"type\":\"text\"}}},\"search\":{\"properties\":
{\"columns\":{\"type\":\"keyword\"},\"description\":{\"type\":\"text\"},\"hits\":
{\"type\":\"integer\"},\"kibanaSavedObjectMeta\":{\"properties\":{\"searchSourceJSON\":
{\"type\":\"text\"}}},\"sort\":{\"type\":\"keyword\"},\"title\":{\"type\":\"text\"},\"version\":
{\"type\":\"integer\"}}},\"dashboard\":{\"properties\":{\"description\":
{\"type\":\"text\"},\"hits\":{\"type\":\"integer\"},\"kibanaSavedObjectMeta\":{\"properties\":
{\"searchSourceJSON\":{\"type\":\"text\"}}},\"optionsJSON\":{\"type\":\"text\"},\"panelsJSON\":
{\"type\":\"text\"},\"refreshInterval\":{\"properties\":{\"display\":
{\"type\":\"keyword\"},\"pause\":{\"type\":\"boolean\"},\"section\":
{\"type\":\"integer\"},\"value\":{\"type\":\"integer\"}}},\"timeFrom\":
{\"type\":\"keyword\"},\"timeRestore\":{\"type\":\"boolean\"},\"timeTo\":
{\"type\":\"keyword\"},\"title\":{\"type\":\"text\"},\"uiStateJSON\":
{\"type\":\"text\"},\"version\":{\"type\":\"integer\"}}},\"url\":{\"properties\":
{\"accessCount\":{\"type\":\"long\"},\"accessDate\":{\"type\":\"date\"},\"createDate\":
{\"type\":\"date\"},\"url\":{\"type\":\"text\",\"fields\":{\"keyword\":
{\"type\":\"keyword\",\"ignore_above\":2048}}}}},\"server\":{\"properties\":{\"uuid\":
{\"type\":\"keyword\"}}},\"kql-telemetry\":{\"properties\":{\"optInCount\":
{\"type\":\"long\"},\"optOutCount\":{\"type\":\"long\"}}},\"timelion-sheet\":{\"properties\":
{\"description\":{\"type\":\"text\"},\"hits\":{\"type\":\"integer\"},\"kibanaSavedObjectMeta\":
{\"properties\":{\"searchSourceJSON\":{\"type\":\"text\"}}},\"timelion_chart_height\":
{\"type\":\"integer\"},\"timelion_columns\":{\"type\":\"integer\"},\"timelion_interval\":
{\"type\":\"keyword\"},\"timelion_other_interval\":{\"type\":\"keyword\"},\"timelion_rows\":
{\"type\":\"integer\"},\"timelion_sheet\":{\"type\":\"text\"},\"title\":
{\"type\":\"text\"},\"version\":{\"type\":\"integer\"}}}}}},\"settings\":
{\"number_of_shards\":1,\"auto_expand_replicas\":\"0-1\"}}","statusCode":500,"response":"
{\"error\":{\"root_cause\":
[{\"type\":\"exception\",\"reason\":\"org.apache.cassandra.exceptions.UnavailableException:
Cannot achieve consistency level
QUORUM\"}],\"type\":\"exception\",\"reason\":\"org.apache.cassandra.exceptions.UnavailableExcept
ion: Cannot achieve consistency level QUORUM\",\"caused_by\":
{\"type\":\"unavailable_exception\",\"reason\":\"Cannot achieve consistency level
QUORUM\"}},\"status\":500}"}
"_kibana_1"和"_kibana"的键空间导致Kibana服务无法启动
systemctl status kibana
● kibana.service - Kibana
Loaded: loaded (/etc/systemd/system/kibana.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2020-09-10 16:26:14 CEST; 2s ago
Process: 16942 ExecStart=/usr/share/kibana/bin/kibana -c /etc/kibana/kibana.yml (code=exited, status=1
Main PID: 16942 (code=exited, status=1/FAILURE)
Sep 10 16:26:14 ns3053180 systemd[1]: kibana.service: Service hold-off time over, scheduling restart.
Sep 10 16:26:14 ns3053180 systemd[1]: kibana.service: Scheduled restart job, restart counter is at 3.
Sep 10 16:26:14 ns3053180 systemd[1]: Stopped Kibana.
Sep 10 16:26:14 ns3053180 systemd[1]: kibana.service: Start request repeated too quickly.
Sep 10 16:26:14 ns3053180 systemd[1]: kibana.service: Failed with result 'exit-code'.
Sep 10 16:26:14 ns3053180 systemd[1]: Failed to start Kibana.
最佳答案
我认为这是您的问题:
system_auth WITH REPLICATION= {'class' : 'SimpleStrategy', 'DC1' :2 };
SimpleStrategy类不接受数据中心/ RF对作为参数。它有一个参数，就是replication_factor:ALTER KEYSPACE system_auth WITH REPLICATION= {'class' : 'SimpleStrategy', 'replication_factor' :2 };
NetworkTopologyStrategy采用您上面提供的参数:ALTER KEYSPACE system_auth WITH REPLICATION= {'class' : 'NetworkTopologyStrategy', 'DC1' :2 };
SimpleStrategy。我从不使用它。注意:如果要查询
LOCAL_QUORUM，则应至少有3个副本。或者至少是能够计算多数的奇数。因为2的定额是2，所以仅使用2个副本的定额查询并不能真正帮助您。关于elasticsearch - Cassandra:无法在特定键空间上达到一致性级别QUORUM，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/63832233/