Resilient Gluster mount The 2019 Stack Overflow Developer Survey Results Are InHow to share...
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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;
}
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
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
1112
add a comment |
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
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
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
yesterday
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
yesterday
add a comment |
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
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
1112
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
linux glusterfs
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
1112
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
1112
edited yesterday
Yanko Hernández Álvarez
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
1112
asked yesterday
Yanko Hernández ÁlvarezYanko Hernández Álvarez
1112
asked yesterday
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
yesterday
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
yesterday
add a comment |
"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
yesterday
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
yesterday
"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
yesterday
"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
yesterday
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
yesterday
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
yesterday
add a comment |
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"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
yesterday
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
yesterday