Get rid of kubectl in redis sidecar

redis-sidecar.sh

#!/usr/bin/env bash

#  https://github.com/CommercialTribe/kube-redis/blob/develop/sidecar.sh

KUBE_TOKEN=$(</var/run/secrets/kubernetes.io/serviceaccount/token)
KUBE_CA=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
KUBE_NS=$(</var/run/secrets/kubernetes.io/serviceaccount/namespace)

KUBE_URL="https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT_HTTPS"

hosts () {
  curl -sS --cacert $KUBE_CA -H "Authorization: Bearer $KUBE_TOKEN" \
       https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT_HTTPS/api/v1/namespaces/$KUBE_NS/pods?labelSelector=$lables \
   | jq -r '.["items"][] | .["status"]["podIP"]' \
   | grep --invert-match $ip
}

set-role-label () {
  curl -sS --cacert $KUBE_CA -H "Authorization: Bearer $KUBE_TOKEN" \
       -H "Content-Type:application/json-patch+json" -X PATCH \
       --data '[{"op":"replace","path":"/metadata/labels/role", "value": "$1" }]' \
       https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_SERVICE_PORT_HTTPS/api/v1/namespaces/$KUBE_NS/pods/`hostname`
       
}