mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-23 11:50:44 +00:00
Revert "Allow creation of clusters larger than 500 nodes"
This commit is contained in:
Zach Loafman
parent
aaa1fe67f6
commit
9492fd6a80
@ -174,7 +174,6 @@ function upgrade-nodes() {
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#
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# Vars set:
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# SANITIZED_VERSION
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# INSTANCE_GROUPS
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# KUBELET_TOKEN
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# KUBE_PROXY_TOKEN
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# CA_CERT_BASE64
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@ -185,7 +184,7 @@ function prepare-node-upgrade() {
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echo "== Preparing node upgrade (to ${KUBE_VERSION}). ==" >&2
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SANITIZED_VERSION=$(echo ${KUBE_VERSION} | sed 's/[\.\+]/-/g')
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detect-node-names # sets INSTANCE_GROUPS
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detect-node-names
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# TODO(zmerlynn): Refactor setting scope flags.
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local scope_flags=
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@ -232,18 +231,16 @@ function do-node-upgrade() {
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subgroup="alpha compute"
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fi
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local template_name=$(get-template-name-from-version ${SANITIZED_VERSION})
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for group in ${INSTANCE_GROUPS[@]}; do
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gcloud ${subgroup} rolling-updates \
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--project="${PROJECT}" \
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--zone="${ZONE}" \
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start \
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--group="${group}" \
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--template="${template_name}" \
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--instance-startup-timeout=300s \
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--max-num-concurrent-instances=1 \
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--max-num-failed-instances=0 \
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--min-instance-update-time=0s
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done
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gcloud ${subgroup} rolling-updates \
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--project="${PROJECT}" \
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--zone="${ZONE}" \
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start \
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--group="${NODE_INSTANCE_PREFIX}-group" \
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--template="${template_name}" \
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--instance-startup-timeout=300s \
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--max-num-concurrent-instances=1 \
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--max-num-failed-instances=0 \
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--min-instance-update-time=0s
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# TODO(zmerlynn): Wait for the rolling-update to finish.
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@ -253,24 +253,12 @@ function upload-server-tars() {
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# NODE_INSTANCE_PREFIX
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# Vars set:
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# NODE_NAMES
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# INSTANCE_GROUPS
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function detect-node-names {
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detect-project
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INSTANCE_GROUPS=()
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INSTANCE_GROUPS+=($(gcloud compute instance-groups managed list --zone "${ZONE}" --project "${PROJECT}" | grep ${NODE_INSTANCE_PREFIX} | cut -f1 -d" "))
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NODE_NAMES=()
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if [[ -n "${INSTANCE_GROUPS[@]:-}" ]]; then
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for group in "${INSTANCE_GROUPS[@]}"; do
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NODE_NAMES+=($(gcloud compute instance-groups managed list-instances \
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"${group}" --zone "${ZONE}" --project "${PROJECT}" \
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--format=yaml | grep instance: | cut -d ' ' -f 2))
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done
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echo "INSTANCE_GROUPS=${INSTANCE_GROUPS[*]}" >&2
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echo "NODE_NAMES=${NODE_NAMES[*]}" >&2
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else
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echo "INSTANCE_GROUPS=" >&2
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echo "NODE_NAMES=" >&2
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fi
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NODE_NAMES=($(gcloud compute instance-groups managed list-instances \
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"${NODE_INSTANCE_PREFIX}-group" --zone "${ZONE}" --project "${PROJECT}" \
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--format=yaml | grep instance: | cut -d ' ' -f 2))
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echo "NODE_NAMES=${NODE_NAMES[*]}" >&2
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}
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# Detect the information about the minions
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@ -725,43 +713,17 @@ function kube-up {
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create-node-instance-template $template_name
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local defaulted_max_instances_per_mig=${MAX_INSTANCES_PER_MIG:-500}
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if [[ ${defaulted_max_instances_per_mig} -le "0" ]]; then
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echo "MAX_INSTANCES_PER_MIG cannot be negative. Assuming default 500"
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defaulted_max_instances_per_mig=500
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fi
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local num_migs=$(((${NUM_NODES} + ${defaulted_max_instances_per_mig} - 1) / ${defaulted_max_instances_per_mig}))
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local instances_per_mig=$(((${NUM_NODES} + ${num_migs} - 1) / ${num_migs}))
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local last_mig_size=$((${NUM_NODES} - (${num_migs} - 1) * ${instances_per_mig}))
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#TODO: parallelize this loop to speed up the process
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for i in $(seq $((${num_migs} - 1))); do
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gcloud compute instance-groups managed \
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create "${NODE_INSTANCE_PREFIX}-group-$i" \
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--project "${PROJECT}" \
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--zone "${ZONE}" \
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--base-instance-name "${NODE_INSTANCE_PREFIX}" \
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--size "${instances_per_mig}" \
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--template "$template_name" || true;
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gcloud compute instance-groups managed wait-until-stable \
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"${NODE_INSTANCE_PREFIX}-group-$i" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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done
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gcloud compute instance-groups managed \
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create "${NODE_INSTANCE_PREFIX}-group-${num_migs}" \
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create "${NODE_INSTANCE_PREFIX}-group" \
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--project "${PROJECT}" \
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--zone "${ZONE}" \
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--base-instance-name "${NODE_INSTANCE_PREFIX}" \
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--size "${last_mig_size}" \
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--size "${NUM_NODES}" \
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--template "$template_name" || true;
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gcloud compute instance-groups managed wait-until-stable \
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"${NODE_INSTANCE_PREFIX}-group-${num_migs}" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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"${NODE_INSTANCE_PREFIX}-group" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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detect-node-names
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detect-master
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@ -780,12 +742,9 @@ function kube-up {
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METRICS+="--custom-metric-utilization metric=custom.cloudmonitoring.googleapis.com/kubernetes.io/memory/node_reservation,"
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METRICS+="utilization-target=${TARGET_NODE_UTILIZATION},utilization-target-type=GAUGE "
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echo "Creating node autoscalers."
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for i in $(seq ${num_migs}); do
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gcloud compute instance-groups managed set-autoscaling "${NODE_INSTANCE_PREFIX}-group-$i" --zone "${ZONE}" --project "${PROJECT}" \
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--min-num-replicas "${AUTOSCALER_MIN_NODES}" --max-num-replicas "${AUTOSCALER_MAX_NODES}" ${METRICS} || true
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done
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echo "Creating node autoscaler."
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gcloud compute instance-groups managed set-autoscaling "${NODE_INSTANCE_PREFIX}-group" --zone "${ZONE}" --project "${PROJECT}" \
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--min-num-replicas "${AUTOSCALER_MIN_NODES}" --max-num-replicas "${AUTOSCALER_MAX_NODES}" ${METRICS} || true
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fi
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echo "Waiting up to ${KUBE_CLUSTER_INITIALIZATION_TIMEOUT} seconds for cluster initialization."
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@ -851,51 +810,46 @@ function kube-up {
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# down the firewall rules and routes.
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function kube-down {
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detect-project
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detect-node-names # For INSTANCE_GROUPS
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echo "Bringing down cluster"
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set +e # Do not stop on error
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# Delete autoscaler for nodes if present. We assume that all or none instance groups have an autoscaler
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# Delete autoscaler for nodes if present.
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local autoscaler
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autoscaler=( $(gcloud compute instance-groups managed list --zone "${ZONE}" --project "${PROJECT}" \
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| grep "${NODE_INSTANCE_PREFIX}-group-1" \
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| grep "${NODE_INSTANCE_PREFIX}-group" \
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| awk '{print $7}') )
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if [[ "${autoscaler:-}" == "yes" ]]; then
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for group in ${INSTANCE_GROUPS[@]}; do
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gcloud compute instance-groups managed stop-autoscaling "${group}" --zone "${ZONE}" --project "${PROJECT}"
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done
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gcloud compute instance-groups managed stop-autoscaling "${NODE_INSTANCE_PREFIX}-group" --zone "${ZONE}" --project "${PROJECT}"
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fi
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# Get the name of the managed instance group template before we delete the
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# managed instange group. (The name of the managed instnace group template may
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# change during a cluster upgrade.)
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local template=$(get-template "${PROJECT}" "${ZONE}" "${NODE_INSTANCE_PREFIX}-group-1")
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local template=$(get-template "${PROJECT}" "${ZONE}" "${NODE_INSTANCE_PREFIX}-group")
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# The gcloud APIs don't return machine parseable error codes/retry information. Therefore the best we can
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# do is parse the output and special case particular responses we are interested in.
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for group in ${INSTANCE_GROUPS[@]}; do
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if gcloud compute instance-groups managed describe "${group}" --project "${PROJECT}" --zone "${ZONE}" &>/dev/null; then
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deleteCmdOutput=$(gcloud compute instance-groups managed delete --zone "${ZONE}" \
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--project "${PROJECT}" \
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--quiet \
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"${group}")
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if [[ "$deleteCmdOutput" != "" ]]; then
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# Managed instance group deletion is done asynchronously, we must wait for it to complete, or subsequent steps fail
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deleteCmdOperationId=$(echo $deleteCmdOutput | grep "Operation:" | sed "s/.*Operation:[[:space:]]*\([^[:space:]]*\).*/\1/g")
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if [[ "$deleteCmdOperationId" != "" ]]; then
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deleteCmdStatus="PENDING"
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while [[ "$deleteCmdStatus" != "DONE" ]]
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do
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sleep 5
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deleteCmdOperationOutput=$(gcloud compute instance-groups managed --zone "${ZONE}" --project "${PROJECT}" get-operation $deleteCmdOperationId)
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deleteCmdStatus=$(echo $deleteCmdOperationOutput | grep -i "status:" | sed "s/.*status:[[:space:]]*\([^[:space:]]*\).*/\1/g")
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echo "Waiting for MIG deletion to complete. Current status: " $deleteCmdStatus
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done
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fi
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if gcloud compute instance-groups managed describe "${NODE_INSTANCE_PREFIX}-group" --project "${PROJECT}" --zone "${ZONE}" &>/dev/null; then
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deleteCmdOutput=$(gcloud compute instance-groups managed delete --zone "${ZONE}" \
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--project "${PROJECT}" \
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--quiet \
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"${NODE_INSTANCE_PREFIX}-group")
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if [[ "$deleteCmdOutput" != "" ]]; then
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# Managed instance group deletion is done asynchronously, we must wait for it to complete, or subsequent steps fail
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deleteCmdOperationId=$(echo $deleteCmdOutput | grep "Operation:" | sed "s/.*Operation:[[:space:]]*\([^[:space:]]*\).*/\1/g")
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if [[ "$deleteCmdOperationId" != "" ]]; then
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deleteCmdStatus="PENDING"
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while [[ "$deleteCmdStatus" != "DONE" ]]
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do
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sleep 5
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deleteCmdOperationOutput=$(gcloud compute instance-groups managed --zone "${ZONE}" --project "${PROJECT}" get-operation $deleteCmdOperationId)
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deleteCmdStatus=$(echo $deleteCmdOperationOutput | grep -i "status:" | sed "s/.*status:[[:space:]]*\([^[:space:]]*\).*/\1/g")
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echo "Waiting for MIG deletion to complete. Current status: " $deleteCmdStatus
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done
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fi
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fi
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done
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fi
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if gcloud compute instance-templates describe --project "${PROJECT}" "${template}" &>/dev/null; then
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gcloud compute instance-templates delete \
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@ -1028,13 +982,12 @@ function get-template {
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# KUBE_RESOURCE_FOUND
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function check-resources {
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detect-project
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detect-node-names
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echo "Looking for already existing resources"
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KUBE_RESOURCE_FOUND=""
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if [[ -n "${INSTANCE_GROUPS[@]:-}" ]]; then
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KUBE_RESOURCE_FOUND="Managed instance groups ${INSTANCE_GROUPS[@]}"
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if gcloud compute instance-groups managed describe --project "${PROJECT}" --zone "${ZONE}" "${NODE_INSTANCE_PREFIX}-group" &>/dev/null; then
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KUBE_RESOURCE_FOUND="Managed instance group ${NODE_INSTANCE_PREFIX}-group"
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return 1
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fi
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@ -1137,13 +1090,11 @@ function prepare-push() {
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create-node-instance-template $tmp_template_name
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local template_name="${NODE_INSTANCE_PREFIX}-template"
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for group in ${INSTANCE_GROUPS[@]}; do
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gcloud compute instance-groups managed \
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set-instance-template "${group}" \
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--template "$tmp_template_name" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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done
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gcloud compute instance-groups managed \
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set-instance-template "${NODE_INSTANCE_PREFIX}-group" \
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--template "$tmp_template_name" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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gcloud compute instance-templates delete \
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--project "${PROJECT}" \
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@ -1152,13 +1103,11 @@ function prepare-push() {
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create-node-instance-template "$template_name"
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for group in ${INSTANCE_GROUPS[@]}; do
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gcloud compute instance-groups managed \
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set-instance-template "${group}" \
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--template "$template_name" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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done
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gcloud compute instance-groups managed \
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set-instance-template "${NODE_INSTANCE_PREFIX}-group" \
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--template "$template_name" \
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--zone "${ZONE}" \
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--project "${PROJECT}" || true;
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gcloud compute instance-templates delete \
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--project "${PROJECT}" \
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