Substituir um nó de cluster
Para substituir um nó do GitHub Enterprise Server, você deve marcar os nós afetados offline no arquivo de configuração do cluster (cluster.conf
) e adicionar os nós de substituição. Fazer isso pode ser necessário em caso de falha de algum nó ou para adicionar nós com mais recursos a fim de melhorar o desempenho.
Aviso: para evitar conflitos, o nó de substituição deve usar um nome de host exclusivo no cluster.
Substituir um nó em caso de emergência
-
Provision and install GitHub Enterprise Server with a unique hostname on the replacement node.
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Using the administrative shell or DHCP, only configure the IP address of the replacement node. Não altere outras configurações.
-
To mark the failed node offline, on any node, modify the cluster configuration file (
cluster.conf
) in the relevant node section to include the textoffline = true
.For example, this modified
cluster.conf
will mark theghe-data-node-3
node as offline:[cluster "ghe-data-node-3"] hostname = ghe-data-node-3 offline = true ipv4 = 192.168.0.6 # ipv6 = fd12:3456:789a:1::6
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From the administrative shell of the node where you modified
cluster.conf
, runghe-cluster-config-apply
. This will validate the configuration file, copy it to each node in the cluster, and mark the node offline. -
To add the newly provisioned replacement node, on any node, modify the
cluster.conf
file to remove the failed node and add the replacement node. For example, this modifiedcluster.conf
file replacesghe-data-node-3
with the newly provisioned node,ghe-replacement-data-node-3
:[cluster "ghe-replacement-data-node-3"] hostname = ghe-replacement-data-node-3 ipv4 = 192.168.0.7
ipv6 = fd12:3456:789a:1::7
git-server = true pages-server = true mysql-server = true elasticsearch-server = true redis-server = true memcache-server = true metrics-server = true storage-server = true
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If you're replacing the MySQL master node or Redis master node, in
cluster.conf
, modify themysql-master
orredis-master
value with the replacement node name.For example, this modified
cluster.conf
file specifies a newly provisioned cluster node,ghe-replacement-data-node-1
as the MySQL and Redis master node:mysql-master = ghe-replacement-data-node-1 redis-master = ghe-replacement-data-node-1
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From the administrative shell of the node with the modified
cluster.conf
, runghe-cluster-config-init
. This will initialize the newly added node in the cluster. -
From the same node, run
ghe-cluster-config-apply
. This will validate the configuration file, copy it to each node in the cluster, and configure each node according to the modifiedcluster.conf
file.