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https://issues.apache.org/jira/browse/SOLR-8522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15119067#comment-15119067
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Arcadius Ahouansou commented on SOLR-8522:
------------------------------------------
Hello again [~noble.paul]
>From my understanding, a server could have multiple host names and multiple
>public IPs.
And by simply starting solr without the {{-Dhost}} switch, Solr will grab one
of the assigned IPs and use it.
This sometimes is not desirable as it leads to issues ... and that is when
{{-Dhost}} is used to force Solr to use a provided host name or IP.
I downloaded solr 5.4.1 and I ran
{{solr-5.4.1/bin$ ./solr start -e cloud -a "-Dhost=linux01"}}
Then, the output of
{{curl
"http://localhost:8983/solr/admin/collections?action=clusterstatus&wt=json&indent=on"}}
is:
{code}
{
"responseHeader":{
"status":0,
"QTime":2
},
"cluster":{
"collections":{
"gettingstarted":{
"replicationFactor":"2",
"shards":{
"shard1":{
"range":"80000000-ffffffff",
"state":"active",
"replicas":{
"core_node1":{
"core":"gettingstarted_shard1_replica1",
"base_url":"http://linux01:8983/solr";,
"node_name":"linux01:8983_solr",
"state":"active"
},
"core_node4":{
"core":"gettingstarted_shard1_replica2",
"base_url":"http://linux01:7574/solr";,
"node_name":"linux01:7574_solr",
"state":"active",
"leader":"true"
}
}
},
"shard2":{
"range":"0-7fffffff",
"state":"active",
"replicas":{
"core_node2":{
"core":"gettingstarted_shard2_replica1",
"base_url":"http://linux01:8983/solr";,
"node_name":"linux01:8983_solr",
"state":"active"
},
"core_node3":{
"core":"gettingstarted_shard2_replica2",
"base_url":"http://linux01:7574/solr";,
"node_name":"linux01:7574_solr",
"state":"active",
"leader":"true"
}
}
}
},
"router":{
"name":"compositeId"
},
"maxShardsPerNode":"2",
"autoAddReplicas":"false",
"znodeVersion":8,
"configName":"gettingstarted"
}
},
"live_nodes":[
"linux01:7574_solr",
"linux01:8983_solr"
]
}
}
{code}
Please note the line with
{{"base_url":"http://linux01:8983/solr"}}
So, any client (curl or apache httpClient) will be using URL of the form
{{http://linux01:8983/solr}}
which as you said will be resolved into in IP, but this will happen outside of
Solr IMHO.
So, in my humble opinion (and correct me if I am wrong), Solr and the cluster
assignment rules will know only about the host name "linux01"?
Thank you very much [~noble.paul] for your time.
> ImplicitSnitch to support IPv4 fragment and host name fragment tags
> --------------------------------------------------------------------
>
> Key: SOLR-8522
> URL: https://issues.apache.org/jira/browse/SOLR-8522
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Affects Versions: 5.4
> Reporter: Arcadius Ahouansou
> Assignee: Noble Paul
> Priority: Minor
> Attachments: SOLR-8522.patch, SOLR-8522.patch, SOLR-8522.patch
>
>
> This is a description from [~noble.paul]'s comment on SOLR-8146
> h3. IPv4 fragment tags
> Lets assume a Solr node IPv4 address is {{192.93.255.255}} .
> This is about enhancing the current {{ImplicitSnitch}} to support IP based
> tags like:
> - {{hostfrag_1 = 255}}
> - {{hostfrag_2 = 255}}
> - {{hostfrag_3 = 93}}
> - {{hostfrag_4 = 192}}
> Note that IPv6 support will be implemented by a separate ticket
> h3. Host name fragment tags
> Lets assume a Solr node host name {{serv1.dc1.country1.apache.org}} .
> This is about enhancing the current {{ImplicitSnitch}} to support tags like:
> - {{hostfrag_1 = org}}
> - {{hostfrag_2 = apache}}
> - {{hostfrag_3 = country1}}
> - {{hostfrag_4 = dc1}}
> - {{hostfrag_5 = serv1}}
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