diff --git a/frontend/src/api/delivery.ts b/frontend/src/api/delivery.ts
index 5698b03..9aa1180 100644
--- a/frontend/src/api/delivery.ts
+++ b/frontend/src/api/delivery.ts
@@ -25,9 +25,11 @@ export interface CreateMySQLDeliveryPayload {
   instance_name: string
   mysql_version: string
   topology: string
+  replica_count?: number
   mysql_port?: number
   data_disk: string
   target_host?: string
+  target_hosts?: string[]
   cpu_milli: number
   memory_mi: number
   storage_gi: number
@@ -77,6 +79,8 @@ export interface DeliveryTask {
   instance_name: string
   target_host?: string
   target_host_ip?: string
+  target_hosts?: string
+  target_host_ips?: string
   mysql_port?: number
   postgresql_port?: number
   status: string
diff --git a/frontend/src/views/service/Catalog.vue b/frontend/src/views/service/Catalog.vue
index 1b84470..4ac0e52 100644
--- a/frontend/src/views/service/Catalog.vue
+++ b/frontend/src/views/service/Catalog.vue
@@ -101,9 +101,9 @@
                   </el-select>
                 </label>
                 <label class="form-field">
-                  {{ isPostgreSQL && deliveryForm.mode === 'primary_replica' ? '部署主机（按角色顺序）' : '部署主机' }}
+                  {{ (isPostgreSQL && deliveryForm.mode === 'primary_replica') || (activeServiceKey === 'mysql' && deliveryForm.mode === 'replica') ? '部署主机（按角色顺序）' : '部署主机' }}
                   <el-select
-                    v-if="isPostgreSQL && deliveryForm.mode === 'primary_replica'"
+                    v-if="(isPostgreSQL && deliveryForm.mode === 'primary_replica') || (activeServiceKey === 'mysql' && deliveryForm.mode === 'replica')"
                     v-model="deliveryForm.targetHosts"
                     multiple
                     :multiple-limit="deliveryForm.replicaCount + 1"
@@ -116,7 +116,7 @@
                     <el-option v-for="host in targetHosts" :key="host.name" :label="hostLabel(host)" :value="host.name" />
                   </el-select>
                 </label>
-                <label v-if="isPostgreSQL && deliveryForm.mode === 'primary_replica'" class="form-field">
+                <label v-if="(isPostgreSQL && deliveryForm.mode === 'primary_replica') || (activeServiceKey === 'mysql' && deliveryForm.mode === 'replica')" class="form-field">
                   从节点数量
                   <el-input-number v-model="deliveryForm.replicaCount" :min="1" :max="7" controls-position="right" />
                   <small class="field-help">需要 {{ deliveryForm.replicaCount + 1 }} 台不同主机；当前模板可用 {{ targetHosts.length }} 台。</small>
@@ -334,8 +334,14 @@
               <div><span>数据位置</span><strong>{{ deliveryForm.dataDisk }}</strong></div>
             </div>
 
-            <div class="topology" :class="`nodes-${topologyNodes.length}`">
-              <div v-for="node in topologyNodes" :key="node.name" class="node-card">
+            <div class="topology-shell" :class="{ 'is-replica': topologyNodes.length > 1 }">
+              <div class="topology-title">
+                <strong>{{ topologyNodes.length }} 节点{{ topologyNodes.length > 1 ? `（1 主 ${topologyNodes.length - 1} 从）` : '' }}</strong>
+                <span>{{ topologyNodes.length > 1 ? 'GTID 异步复制 · 从节点默认只读' : '单实例部署' }}</span>
+              </div>
+              <div v-if="topologyNodes.length > 1" class="topology-connector"><span>主库复制链路</span></div>
+              <div class="topology" :class="`nodes-${topologyNodes.length}`">
+                <div v-for="(node, index) in topologyNodes" :key="node.name" class="node-card" :class="{ primary: index === 0, replica: index > 0 }">
                 <div class="node-head">
                   <span class="node-icon">{{ activeService.icon }}</span>
                   <strong>{{ node.name }}</strong>
@@ -346,6 +352,7 @@
                   <span>{{ node.role }}</span>
                   <span>{{ storageLabel }} 配额</span>
                 </div>
+                </div>
               </div>
             </div>
 
@@ -423,6 +430,13 @@
                 <span class="tag" :class="connectionReady ? 'tag-green' : 'tag-amber'">{{ connectionReady ? '可连接' : '等待地址' }}</span>
               </div>
               <div class="endpoint-value">{{ resultAddress }}</div>
+              <div v-if="replicaEndpoints.length" class="replica-endpoints">
+                <span class="eyebrow">REPLICA ENDPOINTS</span>
+                <div v-for="endpoint in replicaEndpoints" :key="endpoint" class="replica-endpoint">
+                  <span>从节点</span><code>{{ endpoint }}</code>
+                  <el-button text :icon="CopyDocument" aria-label="复制从节点连接地址" title="复制从节点连接地址" @click="copyText(endpoint, '从节点地址已复制')" />
+                </div>
+              </div>
               <p class="access-note">{{ isPostgreSQL ? '使用 AWX 托管的 postgres 管理员凭据连接。' : '使用交付时设置的 root 管理员账号连接。' }}</p>
               <div class="command-block">
                 <code>{{ databaseCommand }}</code>
@@ -534,7 +548,7 @@ import { computed, onBeforeUnmount, onMounted, reactive, ref, watch } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { ArrowDown, Back, CircleCheck, Connection, CopyDocument, DocumentCopy, Download, Monitor, Promotion, Refresh, Setting, Tickets } from '@element-plus/icons-vue'
 import { useRoute, useRouter } from 'vue-router'
-import { deliveryApi, type DeliveryMountPath, type DeliveryTarget, type DeploymentCredential, type TaskEvent } from '@/api/delivery'
+import { deliveryApi, type DeliveryMountPath, type DeliveryTarget, type DeliveryTask, type DeploymentCredential, type TaskEvent } from '@/api/delivery'
 import { useAuthStore } from '@/stores/auth'
 import { useBusinessLineStore } from '@/stores/businessLine'
 import { useBusinessLineMockProfile } from '@/utils/businessLineMock'
@@ -617,6 +631,7 @@ interface WorkbenchSnapshot {
   deploymentId: string
   deliveryError: string
   deliveredHost: string
+  deliveredHosts?: string[]
   deliveredPort?: number
   lastDeliveryStatus: string
   deliveryLog: string
@@ -660,7 +675,7 @@ const basicServices = ref<Service[]>([
     icon: 'My',
     bgColor: 'var(--logo-w-bg)',
     iconColor: 'var(--tag-blue-text)',
-    description: '单实例标准化交付，完成后自动注册进 CloudDM / open-cdm 数据源，统一审核 SQL 上线。',
+    description: '支持单实例和两节点异步主从交付，完成后自动注册进 CloudDM / open-cdm 数据源。',
     playbook: 'roles/mysql-deploy',
     version: 'v8.0',
     status: '可交付',
@@ -669,6 +684,7 @@ const basicServices = ref<Service[]>([
     versions: ['MySQL 8.0', 'MySQL 8.4'],
     modes: [
       { value: 'single', label: '单实例' },
+      { value: 'replica', label: '一主多从' },
     ],
     specs: ['1C / 2G', '2C / 4G', '4C / 8G', '8C / 16G', '16C / 32G'],
     disks: ['20 GB', '50 GB', '100 GB', '500 GB', '1000 GB'],
@@ -816,6 +832,7 @@ const canceling = ref(false)
 const deploymentId = ref('')
 const deliveryError = ref('')
 const deliveredHost = ref('')
+const deliveredHosts = ref<string[]>([])
 const deliveredPort = ref<number>()
 const deliveryTargets = ref<DeliveryTarget[]>([])
 const selectedTargetId = ref<number>()
@@ -931,10 +948,15 @@ const topologyNodes = computed(() => {
     ]
   }
   return activeServiceKey.value === 'mysql'
-    ? [
-        { name: 'db-tx-021', ip: '10.24.18.21', role: '主节点' },
-        { name: 'db-tx-022', ip: '10.24.18.22', role: '从节点' },
-      ]
+    ? Array.from({ length: deliveryForm.replicaCount + 1 }, (_, index) => {
+        const selectedName = deliveryForm.targetHosts[index]
+        const host = targetHosts.value.find((item) => item.name === selectedName) || targetHosts.value[index]
+        return {
+          name: host?.name || `等待调度 ${index + 1}`,
+          ip: host?.ip || '由 AWX Inventory 分配',
+          role: index === 0 ? '主节点' : `从节点 ${index}`,
+        }
+      })
     : [
         { name: 'ngx-tx-011', ip: '10.24.31.11', role: '主节点' },
         { name: 'ngx-tx-012', ip: '10.24.31.12', role: '备用节点' },
@@ -949,6 +971,7 @@ const runnerPreview = computed(() => {
     `component: ${activeService.value?.key || '-'}`,
     `instance: ${deliveryForm.instanceName}`,
     `topology: ${currentModeLabel.value}`,
+    ...(deliveryForm.mode === 'replica' ? [`replica_count: ${deliveryForm.replicaCount}`] : []),
     `limit: ${selectedTargetHostText.value}`,
     `${isPostgreSQL.value ? 'data_root' : 'data_disk'}: ${deliveryForm.dataDisk}`,
     `resources: ${deliveryForm.spec} / ${storageLabel.value}`,
@@ -968,13 +991,14 @@ const credentialEligible = computed(() => {
 const revealedRootCredential = computed(() => revealedCredentials.value.find((item) => item.username === 'root'))
 const resultReady = computed(() => !taskStateLoading.value && !running.value && isTerminalDeliveryStatus(lastDeliveryStatus.value))
 const selectedTargetHostText = computed(() => {
-  if (isPostgreSQL.value && deliveryForm.mode === 'primary_replica') {
+  if ((isPostgreSQL.value && deliveryForm.mode === 'primary_replica') || (activeServiceKey.value === 'mysql' && deliveryForm.mode === 'replica')) {
     return deliveryForm.targetHosts.length ? deliveryForm.targetHosts.join(', ') : '由 AWX Inventory 分配'
   }
   return deliveryForm.targetHost || '由 AWX Inventory 分配'
 })
 const previewAddress = computed(() => `${selectedHost.value?.ip || 'AWX 自动分配'}:${deliveryForm.port || '自动端口'}`)
 const resultAddress = computed(() => connectionReady.value ? `${deliveredHost.value}:${deliveredPort.value}` : '交付接口未返回地址')
+const replicaEndpoints = computed(() => deliveredHosts.value.slice(1).map((host) => `${host}:${deliveredPort.value || ''}`.replace(/:$/, '')))
 const connectionUri = computed(() => {
   if (!connectionReady.value) return ''
   return isPostgreSQL.value ? `postgresql://postgres@${deliveredHost.value}:${deliveredPort.value}/postgres` : `mysql://root@${deliveredHost.value}:${deliveredPort.value}`
@@ -1134,6 +1158,7 @@ function persistWorkbench() {
     deploymentId: deploymentId.value,
     deliveryError: deliveryError.value,
     deliveredHost: deliveredHost.value,
+    deliveredHosts: deliveredHosts.value,
     deliveredPort: deliveredPort.value,
     lastDeliveryStatus: lastDeliveryStatus.value,
     deliveryLog: deliveryLog.value,
@@ -1197,6 +1222,7 @@ async function restoreWorkbench() {
   deploymentId.value = snapshot.deploymentId
   deliveryError.value = snapshot.deliveryError
   deliveredHost.value = snapshot.deliveredHost
+  deliveredHosts.value = snapshot.deliveredHosts?.length ? snapshot.deliveredHosts : (snapshot.deliveredHost ? [snapshot.deliveredHost] : [])
   deliveredPort.value = snapshot.deliveredPort
   lastDeliveryStatus.value = snapshot.lastDeliveryStatus
   deliveryLog.value = snapshot.deliveryLog
@@ -1209,7 +1235,7 @@ async function restoreWorkbench() {
     taskStateLoading.value = true
     try {
       const data = await deliveryApi.getTask(snapshot.deploymentId)
-      deliveredHost.value = data.task.target_host_ip || deliveredHost.value
+      updateDeliveredHosts(data.task)
       deliveredPort.value = (isPostgreSQL.value ? data.task.postgresql_port : data.task.mysql_port) || deliveredPort.value
       lastDeliveryStatus.value = data.task.status
       credentialAvailable.value = isPostgreSQL.value ? false : data.task.credential_available
@@ -1304,6 +1330,7 @@ function resetExecutionState() {
   canceling.value = false
   deploymentId.value = ''
   deliveredHost.value = ''
+  deliveredHosts.value = []
   deliveredPort.value = undefined
   deliveryLog.value = '[ready] 等待创建交付任务...'
   seenEventIds.value = new Set()
@@ -1352,6 +1379,24 @@ async function precheck() {
     ElMessage.warning('当前没有可用的 AWX 部署模板，请联系平台管理员配置')
     return
   }
+  if (activeServiceKey.value === 'mysql' && deliveryForm.mode === 'replica' && targetHosts.value.length < 2) {
+    precheckPassed.value = false
+    ElMessage.error('一主一从至少需要两个可用的 AWX Inventory 主机')
+    return
+  }
+  if (activeServiceKey.value === 'mysql' && deliveryForm.mode === 'replica') {
+    const requiredHosts = deliveryForm.replicaCount + 1
+    if (targetHosts.value.length < requiredHosts) {
+      precheckPassed.value = false
+      ElMessage.warning(`一主 ${deliveryForm.replicaCount} 从需要 ${requiredHosts} 台不同主机，当前 Inventory 只有 ${targetHosts.value.length} 台`)
+      return
+    }
+    if (deliveryForm.targetHosts.length > 0 && deliveryForm.targetHosts.length !== requiredHosts) {
+      precheckPassed.value = false
+      ElMessage.warning(`请按主节点、从节点顺序选择 ${requiredHosts} 台主机，或清空后由平台自动分配`)
+      return
+    }
+  }
   if (!isPostgreSQL.value && deliveryForm.port !== undefined && (deliveryForm.port < 13306 || deliveryForm.port > 13999)) {
     ElMessage.warning('手动端口必须在 13306–13999 范围内')
     return
@@ -1488,10 +1533,12 @@ function mysqlDeliveryPayload(businessLineId: number) {
     namespace: normalizeDNSLabel(currentName.value),
     instance_name: normalizeDNSLabel(deliveryForm.instanceName),
     mysql_version: mysqlVersionValue(deliveryForm.version),
-    topology: 'standalone',
+    topology: deliveryForm.mode === 'replica' ? 'primary_replica' : 'standalone',
+    replica_count: deliveryForm.mode === 'replica' ? deliveryForm.replicaCount : 0,
     mysql_port: deliveryForm.port || 0,
     data_disk: deliveryForm.dataDisk,
     target_host: deliveryForm.targetHost || undefined,
+    target_hosts: deliveryForm.mode === 'replica' && deliveryForm.targetHosts.length ? deliveryForm.targetHosts : undefined,
     cpu_milli: resources.cpuMilli,
     memory_mi: resources.memoryMi,
     storage_gi: deliveryForm.storageGi,
@@ -1549,6 +1596,12 @@ function hostLabel(host: TargetHostOption) {
   return host.ip ? `${host.name} · ${host.ip}` : host.name
 }
 
+function updateDeliveredHosts(task: DeliveryTask) {
+  const hosts = (task.target_host_ips || '').split(',').map((host) => host.trim()).filter(Boolean)
+  deliveredHosts.value = hosts.length ? hosts : (task.target_host_ip ? [task.target_host_ip] : deliveredHosts.value)
+  deliveredHost.value = task.target_host_ip || deliveredHost.value || deliveredHosts.value[0] || ''
+}
+
 function startTaskPolling(id: string, resetEvents = false) {
   stopPolling()
   if (resetEvents) seenEventIds.value = new Set()
@@ -1564,7 +1617,7 @@ function stopPolling() {
 async function pollTask(id: string) {
   try {
     const data = await deliveryApi.getTask(id)
-    deliveredHost.value = data.task.target_host_ip || deliveredHost.value
+    updateDeliveredHosts(data.task)
     deliveredPort.value = (isPostgreSQL.value ? data.task.postgresql_port : data.task.mysql_port) || deliveredPort.value
     credentialAvailable.value = isPostgreSQL.value ? false : data.task.credential_available
     upsertDeliveryHistory(id, data.task.status, data.task.error_message || '', data.task.created_at)
@@ -2346,6 +2399,13 @@ h4 {
 .preview-panel {
   position: sticky;
   top: 16px;
+  min-width: 0;
+}
+
+.preview-panel > .section-head {
+  margin-bottom: 10px;
+  padding-bottom: 12px;
+  border-bottom: 1px solid var(--line-soft);
 }
 
 .section-head,
@@ -2720,14 +2780,22 @@ h4 {
 .preview-facts {
   display: grid;
   grid-template-columns: repeat(3, minmax(0, 1fr));
-  gap: 10px;
+  gap: 0;
   margin-bottom: 12px;
-  padding-bottom: 12px;
+  padding: 10px 0;
   border-bottom: 1px solid var(--line-soft);
 }
 
 .preview-facts div {
   min-width: 0;
+  min-height: 42px;
+  padding: 0 12px;
+  border-left: 1px solid var(--line-soft);
+}
+
+.preview-facts div:first-child {
+  padding-left: 0;
+  border-left: 0;
 }
 
 .preview-facts span,
@@ -2742,12 +2810,11 @@ h4 {
 }
 
 .preview-facts strong {
-  overflow: hidden;
   color: var(--text-mid);
   font-family: var(--mono);
   font-size: 11px;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+  line-height: 1.4;
+  overflow-wrap: anywhere;
 }
 
 .config-list {
@@ -2798,7 +2865,63 @@ h4 {
 .topology {
   display: grid;
   gap: 10px;
+  max-height: 300px;
+  margin: 0;
+  overflow-y: auto;
+  padding-right: 4px;
+  align-content: start;
+  scrollbar-gutter: stable;
+}
+
+.topology::-webkit-scrollbar {
+  width: 6px;
+}
+
+.topology::-webkit-scrollbar-thumb {
+  border-radius: 3px;
+  background: var(--line);
+}
+
+.topology-shell {
+  position: relative;
   margin-bottom: 14px;
+  padding: 12px;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  background: var(--bg-panel-2);
+}
+
+.topology-title {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 12px;
+  margin-bottom: 8px;
+  color: var(--text-strong);
+}
+
+.topology-title span {
+  color: var(--text-dim);
+  font-size: 12px;
+}
+
+.topology-connector {
+  position: relative;
+  height: 1px;
+  margin: 0 12px 10px;
+  border-top: 1px dashed var(--accent);
+  opacity: 0.65;
+}
+
+.topology-connector span {
+  position: absolute;
+  top: -9px;
+  left: 50%;
+  padding: 0 8px;
+  transform: translateX(-50%);
+  background: var(--bg-panel-2);
+  color: var(--accent);
+  font-size: 11px;
 }
 
 .topology.nodes-1 {
@@ -2813,19 +2936,44 @@ h4 {
   grid-template-columns: repeat(3, minmax(0, 1fr));
 }
 
+.topology.nodes-4,
+.topology.nodes-5,
+.topology.nodes-6,
+.topology.nodes-7,
+.topology.nodes-8 {
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+}
+
 .node-card {
   min-width: 0;
-  padding: 12px;
+  min-height: 112px;
+  padding: 10px 11px;
   border: 1px solid var(--line);
   border-radius: 8px;
   background: var(--bg-panel-2);
 }
 
+.node-card.primary {
+  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
+  background: color-mix(in srgb, var(--accent) 8%, var(--bg-panel-2));
+}
+
+.node-card.replica {
+  border-color: color-mix(in srgb, var(--text-dim) 45%, var(--line));
+}
+
 .node-head {
   display: flex;
   align-items: center;
   gap: 8px;
-  margin-bottom: 8px;
+  margin-bottom: 9px;
+}
+
+.node-head strong {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
 }
 
 .node-icon {
@@ -2843,6 +2991,7 @@ h4 {
   color: var(--text-dim);
   font-family: var(--mono);
   font-size: 11px;
+  line-height: 1.35;
 }
 
 .yaml-preview,
@@ -2859,7 +3008,8 @@ h4 {
 }
 
 .yaml-preview {
-  min-height: 180px;
+  min-height: 0;
+  max-height: 260px;
   margin: 0 0 12px;
   padding: 12px 14px;
 }
@@ -2871,6 +3021,9 @@ h4 {
 }
 
 .form-actions {
+  margin-top: 12px;
+  padding-top: 12px;
+  border-top: 1px solid var(--line-soft);
   justify-content: flex-end;
   gap: 8px;
 }