Merge pull request 'feat:added Slack notifications support' (#38) from feat/slack-notifs into master

Reviewed-on: https://git.nationtech.io/NationTech/harmony/pulls/38
Reviewed-by: johnride <jg@nationtech.io>

harmony/src/modules/monitoring/config.rs

@@ -1,8 +1,7 @@
-use email_address::EmailAddress;
 use serde::Serialize;
-use url::Url;
 
-use super::monitoring_alerting::WebhookServiceType;
+use super::monitoring_alerting::AlertChannel;
+
 
 #[derive(Debug, Clone, Serialize)]
 pub struct KubePrometheusConfig {
@@ -23,9 +22,7 @@ pub struct KubePrometheusConfig {
     pub kube_proxy: bool,
     pub kube_state_metrics: bool,
     pub prometheus_operator: bool,
-    pub webhook_url: Option<Url>,
-    pub webhook_service_type: Option<WebhookServiceType>,
-    pub discord_alert_manager_release_name: String,
+    pub alert_channel: Vec<AlertChannel>,
 }
 impl KubePrometheusConfig {
     pub fn new() -> Self {
@@ -34,8 +31,7 @@ impl KubePrometheusConfig {
             default_rules: true,
             windows_monitoring: false,
             alert_manager: true,
-            webhook_service_type: None,
-            webhook_url: None,
+            alert_channel: Vec::new(),
             grafana: true,
             node_exporter: false,
             prometheus: true,
@@ -49,7 +45,6 @@ impl KubePrometheusConfig {
             prometheus_operator: true,
             core_dns: false,
             kube_scheduler: false,
-            discord_alert_manager_release_name: "discord-alert-manager".into(),
         }
     }
 }

harmony/src/modules/monitoring/discord_alert_manager.rs

@@ -4,28 +4,29 @@ use non_blank_string_rs::NonBlankString;
 
 use crate::modules::helm::chart::HelmChartScore;
 
-use super::config::KubePrometheusConfig;
+use super::{config::KubePrometheusConfig, monitoring_alerting::AlertChannel};
 
-pub fn discord_alert_manager_score(config: &KubePrometheusConfig) -> HelmChartScore {
-    let url = if let Some(url) = &config.webhook_url {
-        url.to_string()
-    } else {
-        "None".to_string()
-    };
+fn get_discord_alert_manager_score(config: &KubePrometheusConfig) -> Option<HelmChartScore> {
+    let (url, name) = config.alert_channel.iter().find_map(|channel| {
+        if let AlertChannel::Discord { webhook_url, name } = channel {
+            Some((webhook_url, name))
+        } else {
+            None
+        }
+    })?;
 
     let values = format!(
         r#"
-
 environment:
   - name: "DISCORD_WEBHOOK"
     value: "{url}"
-    "#,
+"#,
     );
 
-    HelmChartScore {
+    Some(HelmChartScore {
         namespace: Some(NonBlankString::from_str(&config.namespace).unwrap()),
-        release_name: NonBlankString::from_str(&config.discord_alert_manager_release_name).unwrap(),
-        chart_name: NonBlankString::from_str("oci://hub.nationtech.io/nt/alertmanager-discord")
+        release_name: NonBlankString::from_str(&name).unwrap(),
+        chart_name: NonBlankString::from_str("oci://hub.nationtech.io/library/alertmanager-discord")
             .unwrap(),
         chart_version: None,
         values_overrides: None,
@@ -33,5 +34,13 @@ environment:
         create_namespace: true,
         install_only: true,
         repository: None,
+    })
+}
+
+pub fn discord_alert_manager_score(config: &KubePrometheusConfig) -> HelmChartScore {
+    if let Some(chart) = get_discord_alert_manager_score(config) {
+        chart
+    } else {
+        panic!("Expected discord alert manager helm chart");
     }
 }

harmony/src/modules/monitoring/kube_prometheus.rs

@@ -1,6 +1,8 @@
-use super::{config::KubePrometheusConfig, monitoring_alerting::WebhookServiceType};
+use super::{config::KubePrometheusConfig, monitoring_alerting::AlertChannel};
+use log::info;
 use non_blank_string_rs::NonBlankString;
 use std::{collections::HashMap, str::FromStr};
+use url::Url;
 
 use crate::modules::helm::chart::HelmChartScore;
 
@@ -10,14 +12,6 @@ pub fn kube_prometheus_helm_chart_score(config: &KubePrometheusConfig) -> HelmCh
     let default_rules = config.default_rules.to_string();
     let windows_monitoring = config.windows_monitoring.to_string();
     let alert_manager = config.alert_manager.to_string();
-    let webhook_service_type = if let Some(service) = &config.webhook_service_type {
-        match service {
-            WebhookServiceType::Discord  => "Discord".to_string(),
-            WebhookServiceType::Slack  => "Slack".to_string(),
-        }
-    } else {
-        "None".to_string()
-    };
     let grafana = config.grafana.to_string();
     let kubernetes_service_monitors = config.kubernetes_service_monitors.to_string();
     let kubernetes_api_server = config.kubernetes_api_server.to_string();
@@ -31,8 +25,7 @@ pub fn kube_prometheus_helm_chart_score(config: &KubePrometheusConfig) -> HelmCh
     let node_exporter = config.node_exporter.to_string();
     let prometheus_operator = config.prometheus_operator.to_string();
     let prometheus = config.prometheus.to_string();
-    let discord_alert_manager_release_name = config.discord_alert_manager_release_name.to_string();
-    let values = format!(
+    let mut values = format!(
         r#"
 additionalPrometheusRulesMap:
   pods-status-alerts:
@@ -45,23 +38,23 @@ additionalPrometheusRulesMap:
             labels:
               severity: critical
             annotations:
-              title: "[CRIT] POD not healthy : {{ $labels.pod }}"
+              title: "[CRIT] POD not healthy : {{{{ $labels.pod }}}}"
               description: |
                A POD is in a non-ready state!
-               - **Pod**: {{ $labels.pod }}
-               - **Namespace**: {{ $labels.namespace }}
+               - **Pod**: {{{{ $labels.pod }}}}
+               - **Namespace**: {{{{ $labels.namespace }}}}
           - alert: "[CRIT] POD crash looping"
             expr: increase(kube_pod_container_status_restarts_total[5m]) > 3
             for: 0m
             labels:
               severity: critical
             annotations:
-              title: "[CRIT] POD crash looping : {{ $labels.pod }}"
+              title: "[CRIT] POD crash looping : {{{{ $labels.pod }}}}"
               description: |
                A POD is drowning in a crash loop!
-               - **Pod**: {{ $labels.pod }}
-               - **Namespace**: {{ $labels.namespace }}
-               - **Instance**: {{ $labels.instance }}
+               - **Pod**: {{{{ $labels.pod }}}}
+               - **Namespace**: {{{{ $labels.namespace }}}}
+               - **Instance**: {{{{ $labels.instance }}}}
   pvc-alerts:
     groups:
       - name: pvc-alerts
@@ -82,8 +75,8 @@ additionalPrometheusRulesMap:
             labels:
               severity: warning
             annotations:
-              description: The PVC {{ $labels.persistentvolumeclaim }} in namespace {{ $labels.namespace }} is predicted to fill over 95% in less than 2 days.
-              title: PVC {{ $labels.persistentvolumeclaim }} in namespace {{ $labels.namespace }} will fill over 95% in less than 2 days
+              description: The PVC {{{{ $labels.persistentvolumeclaim }}}} in namespace {{{{ $labels.namespace }}}} is predicted to fill over 95% in less than 2 days.
+              title: PVC {{{{ $labels.persistentvolumeclaim }}}} in namespace {{{{ $labels.namespace }}}} will fill over 95% in less than 2 days
 defaultRules:
   create: {default_rules}
   rules:
@@ -123,26 +116,6 @@ defaultRules:
     windows: true
 windowsMonitoring:
   enabled: {windows_monitoring}
-alertmanager:
-  enabled: {alert_manager}
-  config: 
-    route:
-      group_by: ['job']
-      group_wait: 30s
-      group_interval: 5m
-      repeat_interval: 12h
-      receiver: '{webhook_service_type}'
-      routes:
-      - receiver: 'null'
-        matchers:
-          - alertname="Watchdog"
-        continue: false
-    receivers:
-    - name: 'null'
-    - name: '{webhook_service_type}'
-      webhook_configs:
-      - url: 'http://{discord_alert_manager_release_name}-alertmanager-discord:9094'
-        send_resolved: true
 grafana:
   enabled: {grafana}
 kubernetesServiceMonitors:
@@ -172,6 +145,66 @@ prometheus:
 "#,
     );
 
+    let alertmanager_config = alert_manager_yaml_builder(&config);
+    values.push_str(&alertmanager_config);
+
+    fn alert_manager_yaml_builder(config: &KubePrometheusConfig) -> String {
+        let mut receivers = String::new();
+        let mut routes = String::new();
+        let mut global_configs = String::new();
+        let alert_manager = config.alert_manager;
+        for alert_channel in &config.alert_channel {
+            match alert_channel {
+                AlertChannel::Discord { name, .. } => {
+                    let (receiver, route) = discord_alert_builder(name);
+                    info!("discord receiver: {} \nroute: {}", receiver, route);
+                    receivers.push_str(&receiver);
+                    routes.push_str(&route);
+                }
+                AlertChannel::Slack {
+                    slack_channel,
+                    webhook_url,
+                } => {
+                    let (receiver, route) = slack_alert_builder(slack_channel);
+                    info!("slack receiver: {} \nroute: {}", receiver, route);
+                    receivers.push_str(&receiver);
+
+                    routes.push_str(&route);
+                    let global_config = format!(
+                        r#"
+    global:
+      slack_api_url: {webhook_url}"#
+                    );
+
+                    global_configs.push_str(&global_config);
+                }
+                AlertChannel::Smpt { .. } => todo!(),
+            }
+        }
+        info!("after alert receiver: {}", receivers);
+        info!("after alert routes: {}", routes);
+
+        let alertmanager_config = format!(
+            r#"
+alertmanager:
+  enabled: {alert_manager}
+  config: {global_configs}
+    route: 
+      group_by: ['job']
+      group_wait: 30s
+      group_interval: 5m
+      repeat_interval: 12h
+      routes:
+{routes}
+    receivers: 
+    - name: 'null'
+{receivers}"#
+        );
+
+        info!("alert manager config: {}", alertmanager_config);
+        alertmanager_config
+    }
+
     HelmChartScore {
         namespace: Some(NonBlankString::from_str(&config.namespace).unwrap()),
         release_name: NonBlankString::from_str("kube-prometheus").unwrap(),
@@ -187,3 +220,43 @@ prometheus:
         repository: None,
     }
 }
+
+fn discord_alert_builder(release_name: &String) -> (String, String) {
+    let discord_receiver_name = format!("Discord-{}", release_name);
+    let receiver = format!(
+        r#"
+    - name: '{discord_receiver_name}'
+      webhook_configs:
+      - url: 'http://{release_name}-alertmanager-discord:9094'
+        send_resolved: true"#,
+    );
+    let route = format!(
+        r#"
+      - receiver: '{discord_receiver_name}'
+        matchers: 
+          - alertname!=Watchdog
+        continue: true"#,
+    );
+    (receiver, route)
+}
+
+fn slack_alert_builder(slack_channel: &String) -> (String, String) {
+    let slack_receiver_name = format!("Slack-{}", slack_channel);
+    let receiver = format!(
+        r#"
+    - name: '{slack_receiver_name}'
+      slack_configs:
+      - channel: '{slack_channel}'
+        send_resolved: true
+        title: '{{{{ .CommonAnnotations.title }}}}'
+        text: '{{{{ .CommonAnnotations.description }}}}'"#,
+    );
+    let route = format!(
+        r#"
+      - receiver: '{slack_receiver_name}'
+        matchers: 
+          - alertname!=Watchdog
+        continue: true"#,
+    );
+    (receiver, route)
+}

harmony/src/modules/monitoring/monitoring_alerting.rs

@@ -20,9 +20,13 @@ use super::{
 
 #[derive(Debug, Clone, Serialize)]
 pub enum AlertChannel {
-    WebHookUrl {
-        url: Url,
-        webhook_service_type: WebhookServiceType,
+    Discord {
+        name: String,
+        webhook_url: Url,
+    },
+    Slack {
+        slack_channel: String,
+        webhook_url: Url,
     },
     //TODO test and implement in helm chart
     //currently does not work
@@ -32,46 +36,19 @@ pub enum AlertChannel {
     },
 }
 
-#[derive(Debug, Clone, Serialize)]
-pub enum WebhookServiceType {
-    Discord,
-    //TODO test slack notifications
-    Slack,
-}
-
 #[derive(Debug, Clone, Serialize)]
 pub struct MonitoringAlertingStackScore {
-    pub alert_channel: Option<AlertChannel>,
+    pub alert_channel: Vec<AlertChannel>,
     pub namespace: Option<String>,
 }
 
 impl MonitoringAlertingStackScore {
     pub fn new() -> Self {
         Self {
-            alert_channel: None,
+            alert_channel: Vec::new(),
             namespace: None,
         }
     }
-    fn set_alert_channel(&self, config: &mut KubePrometheusConfig) {
-        if let Some(alert_channel) = &self.alert_channel {
-            match alert_channel {
-                AlertChannel::WebHookUrl {
-                    url,
-                    webhook_service_type,
-                } => {
-                    config.webhook_url = Some(url.clone());
-                    config.webhook_service_type = Some(webhook_service_type.clone());
-                }
-                AlertChannel::Smpt {
-                    //TODO setup smpt alerts 
-                    email_address,
-                    service_name,
-                } => {
-                    todo!()
-                }
-            }
-        }
-    }
 }
 
 impl<T: Topology + HelmCommand> Score<T> for MonitoringAlertingStackScore {
@@ -93,10 +70,10 @@ struct MonitoringAlertingStackInterpret {
 impl MonitoringAlertingStackInterpret {
     async fn build_kube_prometheus_helm_chart_config(&self) -> KubePrometheusConfig {
         let mut config = KubePrometheusConfig::new();
-        self.score.set_alert_channel(&mut config);
         if let Some(ns) = &self.score.namespace {
             config.namespace = ns.clone();
         }
+        config.alert_channel = self.score.alert_channel.clone();
         config
     }
 
@@ -119,26 +96,30 @@ impl MonitoringAlertingStackInterpret {
         topology: &T,
         config: &KubePrometheusConfig,
     ) -> Result<Outcome, InterpretError> {
-        match &self.score.alert_channel {
-            Some(AlertChannel::WebHookUrl {
-                webhook_service_type,
-                ..
-            }) => match webhook_service_type {
-                WebhookServiceType::Discord => {
+        let mut outcomes = vec![];
+
+        for channel in &self.score.alert_channel {
+            let outcome = match channel {
+                AlertChannel::Discord { .. } => {
                     discord_alert_manager_score(config)
                         .create_interpret()
                         .execute(inventory, topology)
                         .await
                 }
-                WebhookServiceType::Slack => Ok(Outcome::success(
+                AlertChannel::Slack { .. } => Ok(Outcome::success(
                     "No extra configs for slack alerting".to_string(),
                 )),
-            },
-            Some(AlertChannel::Smpt { .. }) => {
-                todo!()
-            }
-            None => Ok(Outcome::success("No alert channel configured".to_string())),
+                AlertChannel::Smpt { .. } => {
+                    todo!()
+                }
+            };
+            outcomes.push(outcome);
         }
+        for result in outcomes {
+            result?; 
+        }
+
+        Ok(Outcome::success("All alert channels deployed".to_string()))
     }
 }
 
@@ -155,7 +136,8 @@ impl<T: Topology + HelmCommand> Interpret<T> for MonitoringAlertingStackInterpre
         self.deploy_kube_prometheus_helm_chart_score(inventory, topology, &config)
             .await?;
         info!("Installing alert channel service");
-        self.deploy_alert_channel_service(inventory, topology, &config).await?;
+        self.deploy_alert_channel_service(inventory, topology, &config)
+            .await?;
         Ok(Outcome::success(format!(
             "succesfully deployed monitoring and alerting stack"
         )))