65 lines
1.7 KiB
Markdown
65 lines
1.7 KiB
Markdown
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# ZOREIDE
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High Availability daemon to share an IP around N servers.
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Zoreide is a daemon service you can use to share an IP among N servers. If the server owning the IP is down,
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another one will replace it. Differently than Keepalived, it allows N servers instead of just 2. Perfect for docker-swarm
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arrays.
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The daemon uses Multicast in order to elect the node which will have the IP configured.
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To use it, you need:
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- root access to the servers
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- a valid multicast IP address in your network. (otherwise you can use the ones in zoreide.json)
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- linux servers under the same router.
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To compile it , you need:
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- golang compiler 1.4 or superior.
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- git , to download this repo.
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- write "go build"
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- ./zoreide &
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Configuration contains:
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```
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{
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"MulticastConfig": {
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"MIpAddr": "239.0.0.19",
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"MPort": "9898",
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"MaxDatagramSize": 18
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},
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"InterfaceConfig": {
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"ExistingInterface": "eth0",
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"BridgeIpCIDR": "10.0.1.1/24"
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}
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}
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```
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Where:
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- MIpAddr is the multicast address all the nodes will use to align.Must be the same on all nodes.
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- Mport: Multicast port to subscribe. Must be the same on all nodes.
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- MaxDataGramSize : obsolete, will be removed soon.
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- ExistingInterface: the name of your ingress interface (eth0, eno0 , enps18, whatever your system is using. This may be different node by node)
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- BridgeIpCidr: the IP address and mask you want to share among servers.
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# FAQ
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- why? Keepalived wasn't enough?
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- VRRP is ok, but it has just two states, active and passive. I want to have as much as nodes as I want.
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- why you need more than one server to share the IP?
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- because 6 is better than 2 for HA.
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- MetalLb under Kubernetes can achieve the same.
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- Nobody really needs kubernetes. I want a floating , HA IP without this.
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