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Tested with `kind` and GKE. Note: "nodes" shown in `docker buildx ls` are unrelated to Kubernetes "nodes". Probably buildx should come up with an alternative term. Usage: $ kind create cluster $ export KUBECONFIG="$(kind get kubeconfig-path --name="kind")" $ docker buildx create --driver kubernetes --driver-opt replicas=3 --use $ docker buildx build -t foo --load . `--load` loads the image into the local Docker. Driver opts: - `image=IMAGE` - Sets the container image to be used for running buildkit. - `namespace=NS` - Sets the Kubernetes namespace. Defaults to the current namespace. - `replicas=N` - Sets the number of `Pod` replicas. Defaults to 1. - `rootless=(true|false)` - Run the container as a non-root user without `securityContext.privileged`. Defaults to false. - `loadbalance=(sticky|random)` - Load-balancing strategy. If set to "sticky", the pod is chosen using the hash of the context path. Defaults to "sticky" Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
71 lines
1.9 KiB
Markdown
71 lines
1.9 KiB
Markdown
hashring
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============================
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Implements consistent hashing that can be used when
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the number of server nodes can increase or decrease (like in memcached).
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The hashing ring is built using the same algorithm as libketama.
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This is a port of Python hash_ring library <https://pypi.python.org/pypi/hash_ring/>
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in Go with the extra methods to add and remove nodes.
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Using
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============================
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Importing ::
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```go
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import "github.com/serialx/hashring"
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```
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Basic example usage ::
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```go
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memcacheServers := []string{"192.168.0.246:11212",
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"192.168.0.247:11212",
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"192.168.0.249:11212"}
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ring := hashring.New(memcacheServers)
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server, _ := ring.GetNode("my_key")
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```
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To fulfill replication requirements, you can also get a list of servers that should store your key.
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```go
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serversInRing := []string{"192.168.0.246:11212",
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"192.168.0.247:11212",
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"192.168.0.248:11212",
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"192.168.0.249:11212",
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"192.168.0.250:11212",
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"192.168.0.251:11212",
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"192.168.0.252:11212"}
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replicaCount := 3
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ring := hashring.New(serversInRing)
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server, _ := ring.GetNodes("my_key", replicaCount)
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```
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Using weights example ::
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```go
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weights := make(map[string]int)
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weights["192.168.0.246:11212"] = 1
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weights["192.168.0.247:11212"] = 2
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weights["192.168.0.249:11212"] = 1
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ring := hashring.NewWithWeights(weights)
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server, _ := ring.GetNode("my_key")
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```
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Adding and removing nodes example ::
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```go
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memcacheServers := []string{"192.168.0.246:11212",
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"192.168.0.247:11212",
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"192.168.0.249:11212"}
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ring := hashring.New(memcacheServers)
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ring = ring.RemoveNode("192.168.0.246:11212")
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ring = ring.AddNode("192.168.0.250:11212")
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server, _ := ring.GetNode("my_key")
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```
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