node-exporter-installer.bash

#!/bin/bash

NODE_EXPORTER_VERSION="1.6.1"
NODE_EXPORTER_USER="node_exporter"
BIN_DIRECTORY="/usr/local/bin"

# Create user if not exists
id -u ${NODE_EXPORTER_USER} &>/dev/null || useradd --no-create-home --shell /bin/false ${NODE_EXPORTER_USER}

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to create user ${NODE_EXPORTER_USER}"
    exit 1
fi

# Install wget if not exists
if ! command -v wget &>/dev/null; then
    apt-get install -y wget
fi

# Install openssl if not exists
if ! command -v openssl &>/dev/null; then
    apt-get install -y openssl
fi

# Download exporter and extract
wget https://github.com/prometheus/node_exporter/releases/download/v${NODE_EXPORTER_VERSION}/node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to download node exporter"
    exit 1
fi

tar -xvf node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to extract node exporter"
    exit 1
fi

cp node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64/node_exporter ${BIN_DIRECTORY}/
chown ${NODE_EXPORTER_USER}:${NODE_EXPORTER_USER} ${BIN_DIRECTORY}/node_exporter

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to copy node exporter to ${BIN_DIRECTORY}"
    exit 1
fi

echo "Copied node exporter to ${BIN_DIRECTORY}"

rm -rf node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64.tar.gz node_exporter-${NODE_EXPORTER_VERSION}.linux-amd64

echo "Removed node exporter files"



# Create /etc/node-exporter if not exists
if [ ! -d /etc/node-exporter ]; then
    mkdir /etc/node-exporter
    echo "Created /etc/node-exporter"
fi

# Move to /etc/node-exporter
cd /etc/node-exporter

# Generate self-signed cert for node exporter
openssl req -new -newkey rsa:2048 -days 365 -nodes -x509 -keyout node_exporter.key -out node_exporter.crt -subj "/C=ZA/ST=CT/L=SA/O=VPN/CN=localhost" -addext "subjectAltName = DNS:localhost"

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to generate self-signed cert for node exporter"
    exit 1
fi

# Install apache2-utils if not exists
if ! command -v htpasswd &>/dev/null; then
    apt-get install -y apache2-utils
fi


# Generate password using htpasswd and save to variable
NODE_EXPORTER_PASSWORD=$( htpasswd -nBC 10 "" | tr -d ':\n'; echo )

# Check if config.yml exists
if [ -f /etc/node-exporter/config.yml ]; then
    echo "config.yml already exists, removing it?"
    read -p "Remove config.yml? [y/n]: " -n 1 -r
    echo ""
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        rm -f /etc/node-exporter/config.yml
    else
        echo "Aborting"
        exit 1
    fi

fi

# Create config.yml
cat <<EOF > /etc/node-exporter/config.yml
tls_server_config:
  cert_file: /etc/node-exporter/node_exporter.crt
  key_file: /etc/node-exporter/node_exporter.key
basic_auth_users:
    prometheus: "${NODE_EXPORTER_PASSWORD}"
EOF

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to create config.yml"
    exit 1
fi

chown -R ${NODE_EXPORTER_USER}:${NODE_EXPORTER_USER} /etc/node-exporter

# Check if node_export.service exists
if [ -f /etc/systemd/system/node_exporter.service ]; then
    echo "node_exporter.service already exists"
    exit 1
fi

cat > /etc/systemd/system/node_exporter.service << EOF
[Unit]
Description=Node Exporter
Wants=network-online.target
After=network-online.target
StartLimitIntervalSec=500
StartLimitBurst=5
[Service]
User=${NODE_EXPORTER_USER}
Group=${NODE_EXPORTER_USER}
Type=simple
Restart=on-failure
RestartSec=5s
WorkingDirectory=/etc/node-exporter
ExecStart=${BIN_DIRECTORY}/node_exporter --web.config.file=/etc/node-exporter/config.yml
[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable node_exporter
systemctl restart node_exporter

prometheus-installer.bash

#!/bin/bash

PROMETHEUS_VERSION="2.46.0"
PROMETHEUS_USER="prometheus"
BIN_DIRECTORY="/usr/local/bin"

# Create user if not exists
id -u ${PROMETHEUS_USER} &>/dev/null || useradd --no-create-home --shell /bin/false ${PROMETHEUS_USER}

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to create user ${PROMETHEUS_USER}"
    exit 1
fi

# Install wget if not exists
if ! command -v wget &>/dev/null; then
    apt-get install -y wget
fi

# Install openssl if not exists
if ! command -v openssl &>/dev/null; then
    apt-get install -y openssl
fi

# Download prometheus and extract
wget https://github.com/prometheus/prometheus/releases/download/v${PROMETHEUS_VERSION}/prometheus-${PROMETHEUS_VERSION}.linux-amd64.tar.gz

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to download prometheus"
    exit 1
fi

tar -xvf prometheus-${PROMETHEUS_VERSION}.linux-amd64.tar.gz

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to extract prometheus"
    exit 1
fi

cp prometheus-${PROMETHEUS_VERSION}.linux-amd64/prometheus ${BIN_DIRECTORY}/
chown ${PROMETHEUS_USER}:${PROMETHEUS_USER} ${BIN_DIRECTORY}/prometheus

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to copy prometheus to ${BIN_DIRECTORY}"
    exit 1
fi

echo "Copied prometheus to ${BIN_DIRECTORY}"

rm -rf prometheus-${PROMETHEUS_VERSION}.linux-amd64.tar.gz prometheus-${PROMETHEUS_VERSION}.linux-amd64

echo "Removed prometheus files"



# Create /etc/prometheus if not exists
if [ ! -d /etc/prometheus ]; then
    mkdir /etc/prometheus
    echo "Created /etc/prometheus"
fi

# Move to /etc/prometheus
cd /etc/prometheus

# # Generate self-signed cert for node exporter
# openssl req -new -newkey rsa:2048 -days 365 -nodes -x509 -keyout node_exporter.key -out node_exporter.crt -subj "/C=ZA/ST=CT/L=SA/O=VPN/CN=localhost" -addext "subjectAltName = DNS:localhost"

# # Check if successful
# if [ $? -ne 0 ]; then
#     echo "Failed to generate self-signed cert for node exporter"
#     exit 1
# fi

# # Install apache2-utils if not exists
# if ! command -v htpasswd &>/dev/null; then
#     apt-get install -y apache2-utils
# fi


# # Generate password using htpasswd and save to variable
# NODE_EXPORTER_PASSWORD=$( htpasswd -nBC 10 "" | tr -d ':\n'; echo )

# Check if prometheus.yml exists
if [ -f /etc/prometheus/prometheus.yml ]; then
    echo "prometheus.yml already exists, removing it?"
    read -p "Remove prometheus.yml? [y/n]: " -n 1 -r
    echo ""
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        rm -f /etc/prometheus/prometheus.yml
    else
        echo "Aborting"
        exit 1
    fi

fi

# Create config.yml
cat <<EOF > /etc/prometheus/prometheus.yml
global:
  scrape_interval: 15s
  evaluation_interval: 15s

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']
EOF

# Check if successful
if [ $? -ne 0 ]; then
    echo "Failed to create prometheus.yml"
    exit 1
fi

chown -R ${PROMETHEUS_USER}:${PROMETHEUS_USER} /etc/prometheus

# Check if prometheus.service exists
if [ -f /etc/systemd/system/prometheus.service ]; then
    echo "prometheus.service already exists"
    exit 1
fi

cat > /etc/systemd/system/prometheus.service << EOF
[Unit]
Description=Prometheus
Wants=network-online.target
After=network-online.target
StartLimitIntervalSec=500
StartLimitBurst=5
[Service]
User=${PROMETHERUS_USER}
Group=${PROMEHTHEUS_USER}
Type=simple
Restart=on-failure
RestartSec=5s
ExecStart=${BIN_DIRECTORY}/prometheus --config.file=/etc/prometheus/prometheus.yml
[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable prometheus
systemctl restart prometheus

swarm-installer.bash

#!/bin/bash

# check if /etc/docker/daemon.json exists, stop if it does

if [ -f /etc/docker/daemon.json ]; then
    echo "File /etc/docker/daemon.json exists, add metrics-addr and experimental manually"
    exit 1
fi

# Create /etc/docker/daemon.json if not exists

if [ ! -f /etc/docker/daemon.json ]; then
    touch /etc/docker/daemon.json
fi

# Check if successful

if [ $? -ne 0 ]; then
    echo "Failed to create /etc/docker/daemon.json"
    exit 1
fi

# Get user input, address

read -p "Enter metrics-address: " metrics_address

# Check if successful

if [ $? -ne 0 ]; then
    echo "Failed to get metrics-address"
    exit 1
fi


# add metrics-addr and experimental to /etc/docker/daemon.json
cat <<EOF > /etc/docker/daemon.json
{
  "metrics-addr" : "${metrics_address}:9323",
  "experimental" : true
}
EOF