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PromucFlow_constructor/deploy/k8s/install.k8s.sh
Arpit Mohan 39ab488193
Adding script for k8s deployment (#1359) 
Also support feature for generating SSL certificate for domain when deploying on Kubernetes

Co-authored-by: GEEK Up Team <prj_legodevops@geekup.vn>
2020-10-30 09:51:05 +05:30

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#!/bin/bash
set -o errexit
is_command_present() {
type "$1" >/dev/null 2>&1
}
is_mac() {
[[ $OSTYPE == darwin* ]]
}
# This function checks if the relevant ports required by Appsmith are available or not
# The script should error out in case they aren't available
check_k8s_setup() {
echo "Checking your k8s setup status"
if ! is_command_present kubectl; then
echo "Please install kubectl on your machine"
exit 1
else
if ! is_command_present jq; then
install_jq
fi
clusters=`kubectl config view -o json | jq -r '."current-context"'`
if [[ ! -n $clusters ]]; then
echo "Please setup a k8s cluster & config kubectl to connect to it"
exit 1
fi
k8s_minor_version=`kubectl version --short -o json | jq ."serverVersion.minor" | sed 's/[^0-9]*//g'`
if [[ $k8s_minor_version < 18 ]]; then
echo "+++++++++++ ERROR ++++++++++++++++++++++"
echo "Appsmith deployments require Kubernetes >= v1.18. Found version: v1.$k8s_minor_version"
echo "+++++++++++ ++++++++++++++++++++++++++++"
exit 1
fi;
fi
}
install_jq(){
if [ $package_manager == "brew" ]; then
brew install jq
elif [ $package_manager == "yum" ]; then
yum_cmd="sudo yum --assumeyes --quiet"
$yum_cmd install jq
else
apt_cmd="sudo apt-get --yes --quiet"
$apt_cmd update
$apt_cmd install jq
fi
}
check_os() {
if is_mac; then
package_manager="brew"
desired_os=1
os="Mac"
return
fi
os_name="$(cat /etc/*-release | awk -F= '$1 == "NAME" { gsub(/"/, ""); print $2; exit }')"
case "$os_name" in
Ubuntu*)
desired_os=1
os="ubuntu"
package_manager="apt-get"
;;
Debian*)
desired_os=1
os="debian"
package_manager="apt-get"
;;
Red\ Hat*)
desired_os=1
os="red hat"
package_manager="yum"
;;
CentOS*)
desired_os=1
os="centos"
package_manager="yum"
;;
*)
desired_os=0
os="Not Found"
esac
}
overwrite_file() {
local relative_path="$1"
local template_file="$2"
local full_path="$install_dir/$relative_path"
echo "Copy $template_file to $full_path"
if [[ -f $full_path ]] && ! confirm y "File $relative_path already exists. Would you like to replace it?"; then
rm -f "$template_file"
else
mv -f "$template_file" "$full_path"
fi
}
# This function prompts the user for an input for a non-empty Mongo root password.
read_mongo_password() {
read -srp 'Set the mongo password: ' mongo_root_password
while [[ -z $mongo_root_password ]]; do
echo ""
echo ""
echo "+++++++++++ ERROR ++++++++++++++++++++++"
echo "The mongo password cannot be empty. Please input a valid password string."
echo "++++++++++++++++++++++++++++++++++++++++"
echo ""
read -srp 'Set the mongo password: ' mongo_root_password
done
}
# This function prompts the user for an input for a non-empty Mongo username.
read_mongo_username() {
read -rp 'Set the mongo root user: ' mongo_root_user
while [[ -z $mongo_root_user ]]; do
echo ""
echo "+++++++++++ ERROR ++++++++++++++++++++++"
echo "The mongo username cannot be empty. Please input a valid username string."
echo "++++++++++++++++++++++++++++++++++++++++"
echo ""
read -rp 'Set the mongo root user: ' mongo_root_user
done
}
urlencode() {
# urlencode <string>
local old_lc_collate="$LC_COLLATE"
LC_COLLATE=C
local length="${#1}"
for (( i = 0; i < length; i++ )); do
local c="${1:i:1}"
case $c in
[a-zA-Z0-9.~_-]) printf "$c" ;;
*) printf '%%%02X' "'$c" ;;
esac
done
LC_COLLATE="$old_lc_collate"
}
generate_password() {
# Picked up the following method of generation from : https://gist.github.com/earthgecko/3089509
LC_CTYPE=C tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 13 | head -n 1
}
confirm() {
local default="$1" # Should be `y` or `n`.
local prompt="$2"
local options="y/N"
if [[ $default == y || $default == Y ]]; then
options="Y/n"
fi
local answer
read -rp "$prompt [$options] " answer
if [[ -z $answer ]]; then
# No answer given, the user just hit the Enter key. Take the default value as the answer.
answer="$default"
else
# An answer was given. This means the user didn't get to hit Enter so the cursor on the same line. Do an empty
# echo so the cursor moves to a new line.
echo
fi
[[ yY =~ $answer ]]
}
echo_contact_support() {
echo "Please contact <support@appsmith.com> with your OS details and version${1:-.}"
}
bye() { # Prints a friendly good bye message and exits the script.
set +o errexit
echo "Please share your email to receive support with the installation"
read -rp 'Email: ' email
curl -s --location --request POST 'https://hook.integromat.com/dkwb6i52am93pi30ojeboktvj32iw0fa' \
--header 'Content-Type: text/plain' \
--data-raw '{
"userId": "'"$APPSMITH_INSTALLATION_ID"'",
"event": "Installation Support",
"data": {
"os": "'"$os"'",
"email": "'"$email"'",
"platform": "k8s"
}
}'
echo -e "\nExiting for now. Bye! \U1F44B\n"
exit 1
}
download_template_file() {
templates_dir="$(mktemp -d)"
template_endpoint="https://raw.githubusercontent.com/appsmithorg/appsmith/master"
mkdir -p "$templates_dir"
(
cd "$templates_dir"
curl --remote-name-all --silent --show-error -o appsmith-configmap.yaml.sh \
"$template_endpoint/deploy/k8s/scripts/appsmith-configmap.yaml.sh"
curl --remote-name-all --silent --show-error -o appsmith-ingress.yaml.sh \
"$template_endpoint/deploy/k8s/scripts/appsmith-ingress.yaml.sh"
curl --remote-name-all --silent --show-error -o encryption-configmap.yaml.sh \
"$template_endpoint/deploy/k8s/scripts/encryption-configmap.yaml.sh"
curl --remote-name-all --silent --show-error -o mongo-configmap.yaml.sh \
"$template_endpoint/deploy/k8s/scripts/mongo-configmap.yaml.sh"
curl --remote-name-all --silent --show-error -o nginx-configmap.yaml \
"$template_endpoint/deploy/k8s/scripts/nginx-configmap.yaml"
if [[ "$ssl_enable" == "true" ]]; then
curl --remote-name-all --silent --show-error -o issuer-template.yaml.sh\
"$template_endpoint/deploy/k8s/scripts/issuer-template.yaml.sh"
fi
)
(
cd "$install_dir"
curl --remote-name-all --silent --show-error -o backend-template.yaml \
"$template_endpoint/deploy/k8s/templates/backend-template.yaml"
curl --remote-name-all --silent --show-error -o frontend-template.yaml \
"$template_endpoint/deploy/k8s/templates/frontend-template.yaml"
if [[ "$fresh_installation" == "true" ]]; then
curl --remote-name-all --silent --show-error -o mongo-template.yaml \
"$template_endpoint/deploy/k8s/templates/mongo-template.yaml"
fi
curl --remote-name-all --silent --show-error -o redis-template.yaml \
"$template_endpoint/deploy/k8s/templates/redis-template.yaml"
curl --remote-name-all --silent --show-error -o imago-template.yaml\
"$template_endpoint/deploy/k8s/templates/imago-template.yaml"
)
}
deploy_app() {
kubectl apply -f "$install_dir/config-template"
kubectl apply -f "$install_dir"
}
install_certmanager() {
cert_manager_ns=`kubectl get namespace cert-manager --no-headers --output=go-template={{.metadata.name}} --ignore-not-found`
if [ -z "${cert_manager_ns}" ]; then
echo "Installing Cert-manager";
# cert-manager installation document: https://cert-manager.io/docs/installation/kubernetes/
kubectl apply --validate=false -f https://github.com/jetstack/cert-manager/releases/download/v1.0.3/cert-manager.yaml
sleep 30; # Wait 30s for cert-manger ready
else
echo "Cert-manager already install"
fi
}
wait_for_application_start() {
local timeout=$1
address=$custom_domain
if [[ "$ssl_enable" == "true" ]]; then
protocol="https"
else
protocol="http"
fi
# The while loop is important because for-loops don't work for dynamic values
while [[ $timeout -gt 0 ]]; do
if [[ $address == "" || $address == null ]]; then
address=`kubectl get ingress appsmith-ingress -o json | jq -r '.status.loadBalancer.ingress[0].ip'`
fi
status_code="$(curl -s -o /dev/null -w "%{http_code}" $protocol://$address/api/v1 || true)"
if [[ status_code -eq 401 ]]; then
break
else
echo -ne "Waiting for all containers to start. This check will timeout in $timeout seconds...\r\c"
fi
((timeout--))
sleep 1
done
echo ""
}
echo -e "\U1F44B Thank you for trying out Appsmith! "
echo ""
# Checking OS and assigning package manager
desired_os=0
os=""
echo -e "\U1F575 Detecting your OS"
check_os
APPSMITH_INSTALLATION_ID=$(curl -s 'https://api64.ipify.org')
# Run bye if failure happens
trap bye EXIT
curl -s --location --request POST 'https://hook.integromat.com/dkwb6i52am93pi30ojeboktvj32iw0fa' \
--header 'Content-Type: text/plain' \
--data-raw '{
"userId": "'"$APPSMITH_INSTALLATION_ID"'",
"event": "Installation Started",
"data": {
"os": "'"$os"'",
"platform": "k8s"
}
}'
if [[ $desired_os -eq 0 ]];then
echo ""
echo "This script is currently meant to install Appsmith on Mac OS X | Ubuntu machines."
echo_contact_support " if you wish to extend this support."
bye
else
echo "You're on an OS that is supported by this installation script."
echo ""
fi
if [[ $EUID -eq 0 ]]; then
echo "+++++++++++ ERROR ++++++++++++++++++++++"
echo "Please do not run this script as root/sudo."
echo "++++++++++++++++++++++++++++++++++++++++"
echo_contact_support
bye
fi
# Check for kubernetes setup
check_k8s_setup
read -rp 'Installation Directory [appsmith]: ' install_dir
install_dir="${install_dir:-appsmith}"
if [[ $install_dir != /* ]]; then
# If it's not an absolute path, prepend current working directory to it, to make it an absolute path.
install_dir="$PWD/$install_dir"
fi
echo "Installing Appsmith to '$install_dir'."
mkdir -p "$install_dir"
echo ""
if confirm y "Is this a fresh installation?"; then
fresh_installation="true"
echo "Appsmith needs to create a MongoDB instance."
mongo_protocol="mongodb://"
mongo_host="mongo-service"
mongo_database="appsmith"
# We invoke functions to read the mongo credentials from the user because they MUST be non-empty
read_mongo_username
read_mongo_password
# Since the mongo was automatically setup, this must be the first time installation. Generate encryption credentials for this scenario
auto_generate_encryption="true"
else
fresh_installation="false"
read -rp 'Enter your current mongo db protocol (mongodb:// || mongodb+srv://): ' mongo_protocol
read -rp 'Enter your current mongo db host: ' mongo_host
read -rp 'Enter your current mongo root user: ' mongo_root_user
read -srp 'Enter your current mongo password: ' mongo_root_password
echo ""
read -rp 'Enter your current mongo database name: ' mongo_database
# It is possible that this isn't the first installation.
echo ""
# In this case be more cautious of auto generating the encryption keys. Err on the side of not generating the encryption keys
if confirm y "Do you have any existing data in the database?"; then
auto_generate_encryption="false"
else
auto_generate_encryption="true"
fi
fi
echo ""
# urlencoding the Mongo username and password
encoded_mongo_root_user=$(urlencode "$mongo_root_user")
encoded_mongo_root_password=$(urlencode "$mongo_root_password")
encryptionEnv="$install_dir/config-template/encryption-configmap.yaml"
if test -f "$encryptionEnv"; then
echo "CAUTION : This isn't your first time installing appsmith. Encryption password and salt already exist. Do you want to override this? NOTE: Overwriting the existing salt and password would lead to you losing access to sensitive information encrypted using the same"
echo "1) No. Conserve the older encryption password and salt and continue"
echo "2) Yes. Overwrite the existing encryption (NOT SUGGESTED) with autogenerated encryption password and salt"
echo "3) Yes. Overwrite the existing encryption (NOT SUGGESTED) with manually entering the encryption password and salt"
read -rp 'Enter option number [1]: ' overwrite_encryption
overwrite_encryption=${overwrite_encryption:-1}
auto_generate_encryption="false"
if [[ $overwrite_encryption -eq 1 ]];then
setup_encryption="false"
elif [[ $overwrite_encryption -eq 2 ]];then
setup_encryption="true"
auto_generate_encryption="true"
elif [[ $overwrite_encryption -eq 3 ]];then
setup_encryption="true"
auto_generate_encryption="false"
fi
else
setup_encryption="true"
fi
if [[ "$setup_encryption" = "true" ]];then
if [[ "$auto_generate_encryption" = "false" ]];then
echo "Please enter the salt and password found in the encyption.env file of your previous appsmith installation "
read -rp 'Enter your encryption password: ' user_encryption_password
read -rp 'Enter your encryption salt: ' user_encryption_salt
elif [[ "$auto_generate_encryption" = "true" ]]; then
user_encryption_password=$(generate_password)
user_encryption_salt=$(generate_password)
fi
fi
echo ""
if confirm n "Do you have a custom domain that you would like to link? (Only for cloud installations)"; then
read -rp 'Enter the domain or subdomain on which you want to host appsmith (example.com / app.example.com): ' custom_domain
curl -s --location --request POST 'https://hook.integromat.com/dkwb6i52am93pi30ojeboktvj32iw0fa' \
--header 'Content-Type: text/plain' \
--data-raw '{
"userId": "'"$APPSMITH_INSTALLATION_ID"'",
"event": "Installation Custom Domain",
"data": {
"os": "'"$os"'",
"platform": "k8s"
}
}'
echo ""
echo "+++++++++++ IMPORTANT PLEASE READ ++++++++++++++++++++++"
echo "Please update your DNS records with your domain registrar"
echo "You can read more about this in our Documentation"
echo "https://docs.appsmith.com/v/v1.1/quick-start#custom-domains"
echo "+++++++++++++++++++++++++++++++++++++++++++++++"
echo ""
echo "Would you like to provision an SSL certificate for your custom domain / subdomain?"
if confirm y '(Your DNS records must be updated for us to proceed)'; then
ssl_enable="true"
fi
read -rp 'Enter email address to create SSL certificate: (Optional, but strongly recommended): ' user_email
if confirm n 'Do you want to create certificate in staging mode (which is used for dev purposes and is not subject to rate limits)?'; then
issuer_server="https://acme-staging-v02.api.letsencrypt.org/directory"
else
issuer_server="https://acme-v02.api.letsencrypt.org/directory"
fi
fi
echo ""
echo "Downloading the configuration templates..."
download_template_file
echo ""
echo "Generating the configuration files from the templates"
cd "$templates_dir"
mkdir -p "$install_dir/config-template"
bash "$templates_dir/appsmith-configmap.yaml.sh" "$mongo_protocol" "$mongo_host" "$encoded_mongo_root_user" "$encoded_mongo_root_password" "$mongo_database" > appsmith-configmap.yaml
if [[ "$setup_encryption" == "true" ]]; then
bash "$templates_dir/encryption-configmap.yaml.sh" "$user_encryption_password" "$user_encryption_salt" > encryption-configmap.yaml
overwrite_file "config-template" "encryption-configmap.yaml"
fi
if [[ -n $custom_domain ]]; then
bash "$templates_dir/appsmith-ingress.yaml.sh" "$custom_domain" "$ssl_enable"> ingress-template.yaml
else
bash "$templates_dir/appsmith-ingress.yaml.sh" "" "$ssl_enable" > ingress-template.yaml
fi
if [[ "$ssl_enable" == "true" ]]; then
echo "$user_email"
echo "$issuer_server"
bash "$templates_dir/issuer-template.yaml.sh" "$user_email" "$issuer_server" > issuer-template.yaml
overwrite_file "" "issuer-template.yaml"
fi
overwrite_file "config-template" "nginx-configmap.yaml"
overwrite_file "config-template" "appsmith-configmap.yaml"
overwrite_file "" "ingress-template.yaml"
if [[ "$fresh_installation" == "true" ]]; then
bash "$templates_dir/mongo-configmap.yaml.sh" "$mongo_root_user" "$mongo_root_password" "$mongo_database" > mongo-configmap.yaml
overwrite_file "config-template" "mongo-configmap.yaml"
fi
echo ""
echo "Deploy Appmisth on your cluster"
echo ""
if [[ "$ssl_enable" == "true" ]]; then
install_certmanager
else
echo "No domain found. Skipping generation of SSL certificate."
fi
echo ""
deploy_app
wait_for_application_start 60
echo ""
if [[ $status_code -ne 401 ]]; then
echo "+++++++++++ ERROR ++++++++++++++++++++++"
echo "The containers didn't seem to start correctly. Please run the following command to check pods that may have errored out:"
echo ""
echo -e "kubectl get pods"
echo "For troubleshooting help, please reach out to us via our Discord server: https://discord.com/invite/rBTTVJp"
echo "++++++++++++++++++++++++++++++++++++++++"
echo ""
echo "Please share your email to receive help with the installation"
read -rp 'Email: ' email
curl -s --location --request POST 'https://hook.integromat.com/dkwb6i52am93pi30ojeboktvj32iw0fa' \
--header 'Content-Type: text/plain' \
--data-raw '{
"userId": "'"$APPSMITH_INSTALLATION_ID"'",
"event": "Installation Support",
"data": {
"os": "'"$os"'",
"email": "'"$email"'",
"platform": "k8s"
}
}'
else
curl -s --location --request POST 'https://hook.integromat.com/dkwb6i52am93pi30ojeboktvj32iw0fa' \
--header 'Content-Type: text/plain' \
--data-raw '{
"userId": "'"$APPSMITH_INSTALLATION_ID"'",
"event": "Installation Success",
"data": {
"os": "'"$os"'",
"platform": "k8s"
}
}'
echo "+++++++++++ SUCCESS ++++++++++++++++++++++++++++++"
echo "Your installation is complete!"
echo ""
if [[ -z $custom_domain ]]; then
echo "Your application is running on '$protocol://$address'."
else
echo "Your application is running on '$protocol://$custom_domain'."
fi
echo ""
echo "+++++++++++++++++++++++++++++++++++++++++++++++++"
echo ""
echo "Need help Getting Started?"
echo "Join our Discord server https://discord.com/invite/rBTTVJp"
echo "Please share your email to receive support & updates about appsmith!"
read -rp 'Email: ' email
curl -s --location --request POST 'https://hook.integromat.com/dkwb6i52am93pi30ojeboktvj32iw0fa' \
--header 'Content-Type: text/plain' \
--data-raw '{
"userId": "'"$APPSMITH_INSTALLATION_ID"'",
"event": "Identify Successful Installation",
"data": {
"os": "'"$os"'",
"email": "'"$email"'",
"platform": "k8s"
}
}'
fi
echo -e "\nPeace out \U1F596\n"
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