Resilient Gluster mount The 2019 Stack Overflow Developer Survey Results Are InHow to share the internet connection?What is resolv.conf and why VPN client's hack it?GlusterFS how to failover (smartly) if a mounted Server is failed?GlusterFS replicated volume - mounting issueDoes the Linux kernel support changing gateways based on state of IP outside your network?GlusterFS - Unable to list files within a specific directory on a Gluster fuse mount pointGlusterFS replicated volume auto failover not workingMount nfs hangs clientResolving hostnames querying multiple DNS serversConnecting to Active Directory (possibly with winbind)

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Resilient Gluster mount



The 2019 Stack Overflow Developer Survey Results Are InHow to share the internet connection?What is resolv.conf and why VPN client's hack it?GlusterFS how to failover (smartly) if a mounted Server is failed?GlusterFS replicated volume - mounting issueDoes the Linux kernel support changing gateways based on state of IP outside your network?GlusterFS - Unable to list files within a specific directory on a Gluster fuse mount pointGlusterFS replicated volume auto failover not workingMount nfs hangs clientResolving hostnames querying multiple DNS serversConnecting to Active Directory (possibly with winbind)



.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








0















According to https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Setting%20Up%20Clients/#mounting-volumes




The server specified in the mount command is only used to fetch the gluster configuration volfile describing the volume name. Subsequently, the client will communicate directly with the servers mentioned in the volfile (which might not even include the one used for mount).




when you try to mount to a gluster volume, the first step is to connect to a gluster server to get the configuration volfile.



What happens if that first server is down and THIS initial connect fails (even though SOME OF the other servers are up and THERE IS QUORUM)? The connection should fail, isn't it?



Can I workaround that SINGLE POINT OF FAILURE using several IPs to a single DNS name?



For instance, these are the servers:



10.0.0.1 gfs1.example.com
10.0.0.2 gfs2.example.com
10.0.0.3 gfs3.example.com


and then on the "example.com" DNS zone:



gluster.example.com A 10.0.0.1 
gluster.example.com A 10.0.0.2
gluster.example.com A 10.0.0.3


Can I use this command to do the mount?



mount -t glusterfs gluster.example.com:/test-volume /mnt/glusterfs


Will the mount operation retry the connection attempt with some other IP if the randomly selected one fails?



Will it try every IP on the list until it find some server reachable?



I know most software when there are several IPs to a name, they just select one and use that one, so the above config SHOULD NOT WORK -unless mount.glusterfs have this behavior wired in- which is kind of the question: does it?



In the likely case it doesn’t: is there any way to make this work (some servers down, there is quorum and client trying to connect to the gluster cluster WITH THE SAME NAME ALWAYS -so, no manual intervention-)?










share|improve this question
























  • "the only winning move is not to play" DNS round robin was not ever meant as a high availability configuration e.g. it does not work well.

    – Rui F Ribeiro
    2 days ago












  • OK, then HOW can I do it? if the initial server is down, how can I do it automatically? Making the user manually change the server name and remount is not an option.

    – Yanko Hernández Álvarez
    2 days ago


















0















According to https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Setting%20Up%20Clients/#mounting-volumes




The server specified in the mount command is only used to fetch the gluster configuration volfile describing the volume name. Subsequently, the client will communicate directly with the servers mentioned in the volfile (which might not even include the one used for mount).




when you try to mount to a gluster volume, the first step is to connect to a gluster server to get the configuration volfile.



What happens if that first server is down and THIS initial connect fails (even though SOME OF the other servers are up and THERE IS QUORUM)? The connection should fail, isn't it?



Can I workaround that SINGLE POINT OF FAILURE using several IPs to a single DNS name?



For instance, these are the servers:



10.0.0.1 gfs1.example.com
10.0.0.2 gfs2.example.com
10.0.0.3 gfs3.example.com


and then on the "example.com" DNS zone:



gluster.example.com A 10.0.0.1 
gluster.example.com A 10.0.0.2
gluster.example.com A 10.0.0.3


Can I use this command to do the mount?



mount -t glusterfs gluster.example.com:/test-volume /mnt/glusterfs


Will the mount operation retry the connection attempt with some other IP if the randomly selected one fails?



Will it try every IP on the list until it find some server reachable?



I know most software when there are several IPs to a name, they just select one and use that one, so the above config SHOULD NOT WORK -unless mount.glusterfs have this behavior wired in- which is kind of the question: does it?



In the likely case it doesn’t: is there any way to make this work (some servers down, there is quorum and client trying to connect to the gluster cluster WITH THE SAME NAME ALWAYS -so, no manual intervention-)?










share|improve this question
























  • "the only winning move is not to play" DNS round robin was not ever meant as a high availability configuration e.g. it does not work well.

    – Rui F Ribeiro
    2 days ago












  • OK, then HOW can I do it? if the initial server is down, how can I do it automatically? Making the user manually change the server name and remount is not an option.

    – Yanko Hernández Álvarez
    2 days ago














0












0








0








According to https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Setting%20Up%20Clients/#mounting-volumes




The server specified in the mount command is only used to fetch the gluster configuration volfile describing the volume name. Subsequently, the client will communicate directly with the servers mentioned in the volfile (which might not even include the one used for mount).




when you try to mount to a gluster volume, the first step is to connect to a gluster server to get the configuration volfile.



What happens if that first server is down and THIS initial connect fails (even though SOME OF the other servers are up and THERE IS QUORUM)? The connection should fail, isn't it?



Can I workaround that SINGLE POINT OF FAILURE using several IPs to a single DNS name?



For instance, these are the servers:



10.0.0.1 gfs1.example.com
10.0.0.2 gfs2.example.com
10.0.0.3 gfs3.example.com


and then on the "example.com" DNS zone:



gluster.example.com A 10.0.0.1 
gluster.example.com A 10.0.0.2
gluster.example.com A 10.0.0.3


Can I use this command to do the mount?



mount -t glusterfs gluster.example.com:/test-volume /mnt/glusterfs


Will the mount operation retry the connection attempt with some other IP if the randomly selected one fails?



Will it try every IP on the list until it find some server reachable?



I know most software when there are several IPs to a name, they just select one and use that one, so the above config SHOULD NOT WORK -unless mount.glusterfs have this behavior wired in- which is kind of the question: does it?



In the likely case it doesn’t: is there any way to make this work (some servers down, there is quorum and client trying to connect to the gluster cluster WITH THE SAME NAME ALWAYS -so, no manual intervention-)?










share|improve this question
















According to https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Setting%20Up%20Clients/#mounting-volumes




The server specified in the mount command is only used to fetch the gluster configuration volfile describing the volume name. Subsequently, the client will communicate directly with the servers mentioned in the volfile (which might not even include the one used for mount).




when you try to mount to a gluster volume, the first step is to connect to a gluster server to get the configuration volfile.



What happens if that first server is down and THIS initial connect fails (even though SOME OF the other servers are up and THERE IS QUORUM)? The connection should fail, isn't it?



Can I workaround that SINGLE POINT OF FAILURE using several IPs to a single DNS name?



For instance, these are the servers:



10.0.0.1 gfs1.example.com
10.0.0.2 gfs2.example.com
10.0.0.3 gfs3.example.com


and then on the "example.com" DNS zone:



gluster.example.com A 10.0.0.1 
gluster.example.com A 10.0.0.2
gluster.example.com A 10.0.0.3


Can I use this command to do the mount?



mount -t glusterfs gluster.example.com:/test-volume /mnt/glusterfs


Will the mount operation retry the connection attempt with some other IP if the randomly selected one fails?



Will it try every IP on the list until it find some server reachable?



I know most software when there are several IPs to a name, they just select one and use that one, so the above config SHOULD NOT WORK -unless mount.glusterfs have this behavior wired in- which is kind of the question: does it?



In the likely case it doesn’t: is there any way to make this work (some servers down, there is quorum and client trying to connect to the gluster cluster WITH THE SAME NAME ALWAYS -so, no manual intervention-)?







linux glusterfs






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 days ago







Yanko Hernández Álvarez

















asked 2 days ago









Yanko Hernández ÁlvarezYanko Hernández Álvarez

1112




1112












  • "the only winning move is not to play" DNS round robin was not ever meant as a high availability configuration e.g. it does not work well.

    – Rui F Ribeiro
    2 days ago












  • OK, then HOW can I do it? if the initial server is down, how can I do it automatically? Making the user manually change the server name and remount is not an option.

    – Yanko Hernández Álvarez
    2 days ago


















  • "the only winning move is not to play" DNS round robin was not ever meant as a high availability configuration e.g. it does not work well.

    – Rui F Ribeiro
    2 days ago












  • OK, then HOW can I do it? if the initial server is down, how can I do it automatically? Making the user manually change the server name and remount is not an option.

    – Yanko Hernández Álvarez
    2 days ago

















"the only winning move is not to play" DNS round robin was not ever meant as a high availability configuration e.g. it does not work well.

– Rui F Ribeiro
2 days ago






"the only winning move is not to play" DNS round robin was not ever meant as a high availability configuration e.g. it does not work well.

– Rui F Ribeiro
2 days ago














OK, then HOW can I do it? if the initial server is down, how can I do it automatically? Making the user manually change the server name and remount is not an option.

– Yanko Hernández Álvarez
2 days ago






OK, then HOW can I do it? if the initial server is down, how can I do it automatically? Making the user manually change the server name and remount is not an option.

– Yanko Hernández Álvarez
2 days ago











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