delete script with the old name
This commit is contained in:
Sergey Dudoladov
parent
153ebd335f
commit
105bbdb8e4
234
run_locally.sh
234
run_locally.sh
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#!/usr/bin/env bash
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#
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# Deploy a Postgres operator to a minikube aka local Kubernetes cluster
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# Optionally re-build the operator binary beforehand to test local changes
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# enable unofficial bash strict mode
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set -o errexit
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set -o nounset
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set -o pipefail
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IFS=$'\n\t'
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readonly PATH_TO_LOCAL_OPERATOR_MANIFEST="/tmp/local-postgres-operator.yaml"
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readonly PATH_TO_PORT_FORWARED_KUBECTL_PID="/tmp/kubectl-port-forward.pid"
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readonly LOCAL_PORT="8080"
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readonly OPERATOR_PORT="8080"
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# minikube needs time to create resources,
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# so the script retries actions until all the resources become available
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function retry(){
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local -r cmd_to_retry="$1"
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local -r retry_msg="$2"
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# errexit may break "eval $cmd_to_retry", so we disable it temporarily
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set +o errexit
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# times out after 1 minute
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for i in {1..20}; do
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if eval "$cmd_to_retry"; then
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set -o errexit # enable again
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return 0
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fi
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echo "$retry_msg"
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sleep 3
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done
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>2& echo "The command $cmd_to_retry timed out"
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return 1
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}
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function display_help(){
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echo "Usage: ./run_locally.sh [ -r | --rebuild-operator ] [ -h | --help ]"
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}
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function clean_up(){
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echo "==== CLEAN UP PREVIOUS RUN ==== "
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local status
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status=$(minikube status --format "{{.MinikubeStatus}}" || true)
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if [[ "$status" = "Running" ]] || [[ "$status" = "Stopped" ]]; then
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echo "Delete the existing local cluster so that we can cleanly apply resources from scratch..."
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minikube delete
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fi
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if [[ -e "$PATH_TO_LOCAL_OPERATOR_MANIFEST" ]]; then
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rm --verbose "$PATH_TO_LOCAL_OPERATOR_MANIFEST"
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fi
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# the kubectl process does the port-forwarding between operator and local ports
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# we restart the process to bind to the same port again (see end of script)
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if [[ -e "$PATH_TO_PORT_FORWARED_KUBECTL_PID" ]]; then
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local pid
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pid=$(cat "$PATH_TO_PORT_FORWARED_KUBECTL_PID")
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# the process dies if a minikube stops between two invocations of the script
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if ps --pid "$pid" > /dev/null 2>&1; then
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echo "Kill the kubectl process responsible for port forwarding for minikube so that we can re-use the same ports for forwarding later..."
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kill "$pid"
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fi
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rm --verbose /tmp/kubectl-port-forward.pid
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fi
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}
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function start_minikube(){
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echo "==== START MINIKUBE ==== "
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echo "May take a few minutes ..."
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minikube start
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kubectl config set-context minikube
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echo "==== MINIKUBE STATUS ==== "
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minikube status
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}
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function build_operator_binary(){
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# redirecting stderr greatly reduces non-informative output during normal builds
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echo "Build operator binary (stderr redirected to /dev/null)..."
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make tools > /dev/null 2>&1
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make deps > /dev/null 2>&1
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make local > /dev/null 2>&1
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}
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function deploy_self_built_image() {
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echo "==== DEPLOY CUSTOM OPERATOR IMAGE ==== "
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build_operator_binary
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# the fastest way to run a docker image locally is to reuse the docker from minikube
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# set docker env vars so that docker can talk to the Docker daemon inside the minikube
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eval $(minikube docker-env)
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# image tag consists of a git tag or a unique commit prefix
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# and the "-dev" suffix if there are uncommited changes in the working dir
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local -x TAG
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TAG=$(git describe --tags --always --dirty="-dev")
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readonly TAG
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# build the image
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make docker > /dev/null 2>&1
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# update the tag in the postgres operator conf
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# since the image with this tag already exists on the machine,
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# docker should not attempt to fetch it from the registry due to imagePullPolicy
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sed --expression "s/\(image\:.*\:\).*$/\1$TAG/" manifests/postgres-operator.yaml > "$PATH_TO_LOCAL_OPERATOR_MANIFEST"
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retry "kubectl create -f \"$PATH_TO_LOCAL_OPERATOR_MANIFEST\"" "attempt to create $PATH_TO_LOCAL_OPERATOR_MANIFEST resource"
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}
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function start_operator(){
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echo "==== START OPERATOR ==== "
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echo "Certain operations may be retried multiple times..."
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# the order of resource initialization is significant
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local file
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for file in "configmap.yaml" "serviceaccount.yaml"
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do
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retry "kubectl create -f manifests/\"$file\"" "attempt to create $file resource"
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done
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if [[ "$should_build_custom_operator" = true ]]; then # set in main()
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deploy_self_built_image
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else
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retry "kubectl create -f manifests/postgres-operator.yaml" "attempt to create /postgres-operator.yaml resource"
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fi
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local -r msg="Wait for the postgresql custom resource definition to register..."
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local -r cmd="kubectl get crd | grep --quiet 'postgresqls.acid.zalan.do'"
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retry "$cmd" "$msg "
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kubectl create -f manifests/complete-postgres-manifest.yaml
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}
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function forward_ports(){
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echo "==== FORWARD OPERATOR PORT $OPERATOR_PORT TO LOCAL PORT $LOCAL_PORT ===="
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local operator_pod
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operator_pod=$(kubectl get pod -l name=postgres-operator -o jsonpath={.items..metadata.name})
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# runs in the background to keep current terminal responsive
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# stdout redirect removes the info message about forwarded ports; the message sometimes garbles the cli prompt
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kubectl port-forward "$operator_pod" "$LOCAL_PORT":"$OPERATOR_PORT" &> /dev/null &
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pgrep --newest "kubectl" > "$PATH_TO_PORT_FORWARED_KUBECTL_PID"
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}
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function check_health(){
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echo "==== RUN HEALTH CHECK ==== "
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local -r check_cmd="curl --location http://127.0.0.1:$LOCAL_PORT/clusters &> /dev/null"
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local -r check_msg="Wait for port forwarding to take effect"
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echo "Command for checking: $check_cmd"
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if retry "$check_cmd" "$check_msg"; then
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echo "==== SUCCESS: OPERATOR IS RUNNING ==== "
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echo "To stop it cleanly, run 'minikube delete'"
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else
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>2& echo "==== FAILURE: OPERATOR DID NOT START OR PORT FORWARDING DID NOT WORK ==== "
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exit 1
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fi
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}
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function main(){
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if ! [[ $(basename "$PWD") == "postgres-operator" ]]; then
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echo "Please execute the script only from the root directory of the Postgres opepator repo."
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exit 1
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fi
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trap "echo 'If you observe issues with minikube VM not starting/not proceeding, consider deleting the .minikube dir and/or rebooting before re-running the script'" EXIT
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local should_build_custom_operator=false # used in start_operator()
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while true
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do
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# if the 1st param is unset, use the empty string as a default value
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case "${1:-}" in
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-h | --help)
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display_help
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exit 0
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;;
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-r | --rebuild-operator)
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should_build_custom_operator=true
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break
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;;
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*) break
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;;
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esac
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done
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clean_up
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start_minikube
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start_operator
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forward_ports
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check_health
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exit 0
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}
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main "$@"
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