Update k3s.sh
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theycallmeloki
GitHub
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commit
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@ -55,6 +55,12 @@ common_extra_args="--kubelet-arg containerd=/run/k3s/containerd/containerd.sock"
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server_extra_args="--no-deploy servicelb --no-deploy traefik --kube-controller-manager-arg bind-address=0.0.0.0 --kube-proxy-arg metrics-bind-address=0.0.0.0 --kube-scheduler-arg bind-address=0.0.0.0 --etcd-expose-metrics true"
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agent_extra_args="--node-label worker=true"
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# Create Grafana admin credentials
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grafana_user="adminuser" # desired grafana username
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grafana_password="adminpassword" # Generates a random 12-character password
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#############################################
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# HELPER FUNCTIONS #
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#############################################
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@ -97,7 +103,7 @@ sudo timedatectl set-ntp on
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# Move SSH certs to ~/.ssh and change permissions
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cp /home/$user/{$certName,$certName.pub} /home/$user/.ssh
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chmod 600 /home/$user/.ssh/$certName
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chmod 600 /home/$user/.ssh/$certName
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chmod 644 /home/$user/.ssh/$certName.pub
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# Install k3sup to local machine if not already present
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@ -291,8 +297,7 @@ echo -e " \033[32;5mBe patient as it downloads and configures a number of pods i
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echo -e " \033[32;5mInstalling Longhorn - It can take a while for all pods to deploy...\033[0m"
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kubectl apply -f https://raw.githubusercontent.com/JamesTurland/JimsGarage/main/Kubernetes/Longhorn/longhorn.yaml
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kubectl get pods \
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--namespace longhorn-system \
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--watch
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--namespace longhorn-system
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# Step 17: Print out confirmation
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@ -300,3 +305,109 @@ kubectl get nodes
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kubectl get svc -n longhorn-system
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echo -e " \033[32;5mHappy Kubing! Access Longhorn through Rancher UI\033[0m"
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# Step 18: Download and modify values.yaml for Prometheus
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# Ensure yq is installed
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if ! command -v yq &> /dev/null; then
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echo "yq is not installed. Installing yq..."
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wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/bin/yq && chmod +x /usr/bin/yq
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fi
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echo -e " \033[32;5mSetting up Prometheus...\033[0m"
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# Download values.yaml
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wget https://raw.githubusercontent.com/techno-tim/launchpad/master/kubernetes/kube-prometheus-stack/values.yml -O values.yaml
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# Get master node IPs
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master_ips=$(for node in "${!nodes[@]}"; do
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if [ "$(get_node_type $node)" == "master" ]; then
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echo "$(get_node_ip $node)"
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fi
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done | sort -u)
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echo '------'
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echo 'Master IPs: '
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echo $master_ips
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echo '------'
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# Function to update endpoints in values.yaml
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update_endpoints() {
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local component=$1
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echo "Updating endpoints for $component"
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# Create the new endpoints content
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local new_endpoints=""
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for ip in $master_ips; do
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new_endpoints+=" - $ip\n"
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done
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# Use awk to replace the endpoints section
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awk -v component="$component" -v new_endpoints="$new_endpoints" '
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$0 ~ "^" component ":" {
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print $0
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in_component = 1
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next
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}
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in_component && /^[a-z]/ {
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in_component = 0
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}
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in_component && /^ *endpoints:/ {
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print " endpoints:"
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print new_endpoints
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skip = 1
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next
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}
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skip && /^[^ ]/ {
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skip = 0
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}
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!skip { print }
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' values.yaml > values.yaml.tmp && mv values.yaml.tmp values.yaml
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echo "Updated $component endpoints"
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}
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# Update endpoints for different components
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components=("kubeControllerManager" "kubeEtcd" "kubeScheduler" "kubeProxy")
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for component in "${components[@]}"; do
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update_endpoints "$component"
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done
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# Create Grafana admin credentials
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echo -e " \033[32;5mCreating Grafana admin credentials...\033[0m"
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# Create Kubernetes secret for Grafana
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kubectl create namespace monitoring --dry-run=client -o yaml | kubectl apply -f -
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kubectl create secret generic grafana-admin-credentials \
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--from-literal=admin-user=$grafana_user \
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--from-literal=admin-password=$grafana_password \
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-n monitoring \
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--dry-run=client -o yaml | kubectl apply -f -
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echo -e " \033[32;5mGrafana admin credentials created. Username: $grafana_user, Password: $grafana_password\033[0m"
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echo -e " \033[32;5mPlease make note of these credentials and store them securely.\033[0m"
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# Update Grafana admin credentials in values.yaml
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yq eval '.grafana.admin.existingSecret = "grafana-admin-credentials"' -i values.yaml
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yq eval '.grafana.admin.userKey = "admin-user"' -i values.yaml
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yq eval '.grafana.admin.passwordKey = "admin-password"' -i values.yaml
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# Verify the changes
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for component in "${components[@]}"; do
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echo "Endpoints for ${component}:"
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yq eval ".${component}.endpoints" values.yaml
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done
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echo -e " \033[32;5mvalues.yaml has been updated with master node IPs\033[0m"
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# Step 19: Install Prometheus using Helm
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echo -e " \033[32;5mInstalling Prometheus...\033[0m"
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# Add prometheus-community helm repo
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helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
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helm repo update
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# Install kube-prometheus-stack
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helm install prometheus prometheus-community/kube-prometheus-stack -f values.yaml --namespace monitoring --create-namespace
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echo -e " \033[32;5mPrometheus has been installed!\033[0m"
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