Explorar o Comando kubectl taint
O comando kubectl taint é usado para adicionar, modificar ou remover taints em nós Kubernetes. Taints são pares chave-valor com efeitos que influenciam o agendamento de pods, restringindo quais pods podem ser colocados em nós específicos.
Execute o seguinte comando para visualizar as opções disponíveis para kubectl taint:
kubectl taint -h
Você verá a seguinte saída:
Update the taints on one or more nodes.
* A taint consists of a key, value, and effect. As an argument here, it is expressed as key=value:effect.
* The key must begin with a letter or number, and may contain letters, numbers, hyphens, dots, and underscores, up to
253 characters.
* Optionally, the key can begin with a DNS subdomain prefix and a single '/', like example.com/my-app.
* The value is optional. If given, it must begin with a letter or number, and may contain letters, numbers, hyphens,
dots, and underscores, up to 63 characters.
* The effect must be NoSchedule, PreferNoSchedule or NoExecute.
* Currently taint can only apply to node.
Examples:
## Update node 'foo' with a taint with key 'dedicated' and value 'special-user' and effect 'NoSchedule'
## If a taint with that key and effect already exists, its value is replaced as specified
kubectl taint nodes foo dedicated=special-user:NoSchedule
## Remove from node 'foo' the taint with key 'dedicated' and effect 'NoSchedule' if one exists
kubectl taint nodes foo dedicated:NoSchedule-
## Remove from node 'foo' all the taints with key 'dedicated'
kubectl taint nodes foo dedicated-
## Add a taint with key 'dedicated' on nodes having label mylabel=X
kubectl taint node -l myLabel=X dedicated=foo:PreferNoSchedule
## Add to node 'foo' a taint with key 'bar' and no value
kubectl taint nodes foo bar:NoSchedule
