Merge pull request #315 from coreos/etcd3

Add etcd3 example cluster with rkt
2026-01-27 10:19:35 +00:00 · 2016-08-16 11:49:50 -07:00
parent f9d9bb2367 28c95f3255
commit cae3135ef6
11 changed files with 158 additions and 2 deletions
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ The [examples](examples) network boot and provision CoreOS clusters. Network boo
 * Multi-node [Kubernetes cluster](Documentation/kubernetes.md)
 * Multi-node Kubernetes cluster with rkt container runtime (i.e. rktnetes)
 * Multi-node [self-hosted Kubernetes cluster](Documentation/bootkube.md)
-* Multi-node etcd cluster
+* Multi-node etcd2 or etcd3 cluster
 * Multi-node [Torus](Documentation/torus.md) distributed storage cluster
 * Network boot or Install to Disk
 * Multi-stage CoreOS installs
--- a/examples/README.md
+++ b/examples/README.md
@@ -10,6 +10,7 @@ These examples network boot and provision machines into CoreOS clusters using `b
 | pxe-disk | CoreOS via iPXE, with a root filesystem | alpha/1109.1.0 | Disk | [reference](https://coreos.com/os/docs/latest/booting-with-ipxe.html) |
 | etcd | iPXE boot a 3 node etcd cluster and proxy | alpha/1109.1.0 | RAM | [reference](https://coreos.com/os/docs/latest/cluster-architectures.html) |
 | etcd-install | Install a 3-node etcd cluster to disk | alpha/1109.1.0 | Disk | [reference](https://coreos.com/os/docs/latest/installing-to-disk.html) |
+| etcd3 | Install a 3-node etcd3 cluster | alpha/1109.1.0 | RAM | None |
 | k8s | Kubernetes cluster with 1 master, 2 workers, and TLS-authentication | alpha/1109.1.0 | Disk | [tutorial](../Documentation/kubernetes.md) |
 | k8s-install | Install a Kubernetes cluster to disk | alpha/1109.1.0 | Disk | [tutorial](../Documentation/kubernetes.md) |
 | rktnetes | Kubernetes cluster with rkt container runtime, 1 master, workers, TLS auth (known bugs, experimental) | alpha/1122.0.0 | Disk | None |
--- a/examples/groups/etcd/default.json
+++ b/examples/groups/etcd/default.json
@@ -1,7 +1,7 @@
 {
  "id": "default",
  "name": "default",
-  "profile": "etcd-proxy",
+  "profile": "etcd3-proxy",
  "metadata": {
    "etcd_initial_cluster": "node1=http://node1.example.com:2380,node2=http://node2.example.com:2380,node3=http://node3.example.com:2380"
  }
--- a/examples/groups/etcd3/default.json
+++ b/examples/groups/etcd3/default.json
@@ -0,0 +1,8 @@
+{
+  "id": "default",
+  "name": "default",
+  "profile": "etcd-proxy",
+  "metadata": {
+    "etcd_initial_cluster": "node1=http://node1.example.com:2380,node2=http://node2.example.com:2380,node3=http://node3.example.com:2380"
+  }
+}
--- a/examples/groups/etcd3/node1.json
+++ b/examples/groups/etcd3/node1.json
@@ -0,0 +1,13 @@
+{
+  "id": "node1",
+  "name": "etcd Node 1",
+  "profile": "etcd3",
+  "selector": {
+    "mac": "52:54:00:a1:9c:ae"
+  },
+  "metadata": {
+    "domain_name": "node1.example.com",
+    "etcd_name": "node1",
+    "etcd_initial_cluster": "node1=http://node1.example.com:2380,node2=http://node2.example.com:2380,node3=http://node3.example.com:2380"
+  }
+}
--- a/examples/groups/etcd3/node2.json
+++ b/examples/groups/etcd3/node2.json
@@ -0,0 +1,13 @@
+{
+  "id": "node2",
+  "name": "etcd Node 2",
+  "profile": "etcd3",
+  "selector": {
+    "mac": "52:54:00:b2:2f:86"
+  },
+  "metadata": {
+    "domain_name": "node2.example.com",
+    "etcd_name": "node2",
+    "etcd_initial_cluster": "node1=http://node1.example.com:2380,node2=http://node2.example.com:2380,node3=http://node3.example.com:2380"
+  }
+}
--- a/examples/groups/etcd3/node3.json
+++ b/examples/groups/etcd3/node3.json
@@ -0,0 +1,13 @@
+{
+  "id": "node3",
+  "name": "etcd Node 3",
+  "profile": "etcd3",
+  "selector": {
+    "mac": "52:54:00:c3:61:77"
+  },
+  "metadata": {
+    "domain_name": "node3.example.com",
+    "etcd_name": "node3",
+    "etcd_initial_cluster": "node1=http://node1.example.com:2380,node2=http://node2.example.com:2380,node3=http://node3.example.com:2380"
+  }
+}
--- a/examples/ignition/etcd3-proxy.yaml
+++ b/examples/ignition/etcd3-proxy.yaml
@@ -0,0 +1,37 @@
+---
+systemd:
+  units:
+    - name: etcd3.service
+      enable: true
+      contents: |
+        [Unit]
+        Description=etcd3
+        Conflicts=etcd2.service
+        [Service]
+        Environment="RKT_OPTS=--volume=resolv,kind=host,source=/etc/resolv.conf --mount volume=resolv,target=/etc/resolv.conf"
+        ExecStartPre=/usr/bin/mkdir -p /var/lib/etcd3
+        ExecStartPre=/usr/bin/rkt trust --prefix "coreos.com/etcd" --skip-fingerprint-review
+        ExecStart=/usr/bin/rkt run \
+          --net=host \
+          --volume data-dir,kind=host,source=/var/lib/etcd3 \
+          --mount volume=data-dir,target=/var/lib/etcd3 \
+          $RKT_OPTS \
+          coreos.com/etcd:v3.0.4 -- \
+          -proxy=on \
+          -listen-client-urls=http://0.0.0.0:2379 \
+          -initial-cluster={{.etcd_initial_cluster}}
+        Restart=always
+        RestartSec=0
+        LimitNOFILE=40000
+        [Install]
+        WantedBy=multi-user.target
+
+{{ if index . "ssh_authorized_keys" }}
+passwd:
+  users:
+    - name: core
+      ssh_authorized_keys:
+        {{ range $element := .ssh_authorized_keys }}
+        - {{$element}}
+        {{end}}
+{{end}}
--- a/examples/ignition/etcd3.yaml
+++ b/examples/ignition/etcd3.yaml
@@ -0,0 +1,41 @@
+---
+systemd:
+  units:
+    - name: etcd3.service
+      enable: true
+      contents: |
+        [Unit]
+        Description=etcd3
+        Conflicts=etcd2.service
+        [Service]
+        Environment="RKT_OPTS=--volume=resolv,kind=host,source=/etc/resolv.conf --mount volume=resolv,target=/etc/resolv.conf"
+        ExecStartPre=/usr/bin/mkdir -p /var/lib/etcd3
+        ExecStartPre=/usr/bin/rkt trust --prefix "coreos.com/etcd" --skip-fingerprint-review
+        ExecStart=/usr/bin/rkt run \
+          --net=host \
+          --volume data-dir,kind=host,source=/var/lib/etcd3 \
+          --mount volume=data-dir,target=/var/lib/etcd3 \
+          $RKT_OPTS \
+          coreos.com/etcd:v3.0.4 -- \
+          -name={{.etcd_name}} \
+          -advertise-client-urls=http://{{.domain_name}}:2379 \
+          -initial-advertise-peer-urls=http://{{.domain_name}}:2380 \
+          -listen-client-urls=http://0.0.0.0:2379 \
+          -listen-peer-urls=http://{{.domain_name}}:2380 \
+          -initial-cluster={{.etcd_initial_cluster}} \
+          -data-dir=/var/lib/etcd3
+        Restart=always
+        RestartSec=10
+        LimitNOFILE=40000
+        [Install]
+        WantedBy=multi-user.target
+
+{{ if index . "ssh_authorized_keys" }}
+passwd:
+  users:
+    - name: core
+      ssh_authorized_keys:
+        {{ range $element := .ssh_authorized_keys }}
+        - {{$element}}
+        {{end}}
+{{end}}
--- a/examples/profiles/etcd3-proxy.json
+++ b/examples/profiles/etcd3-proxy.json
@@ -0,0 +1,15 @@
+{
+  "id": "etcd3-proxy",
+  "name": "etcd3-proxy",
+  "boot": {
+    "kernel": "/assets/coreos/1109.1.0/coreos_production_pxe.vmlinuz",
+    "initrd": ["/assets/coreos/1109.1.0/coreos_production_pxe_image.cpio.gz"],
+    "cmdline": {
+      "coreos.config.url": "http://bootcfg.foo:8080/ignition?uuid=${uuid}&mac=${net0/mac:hexhyp}",
+      "coreos.autologin": "",
+      "coreos.first_boot": ""
+    }
+  },
+  "cloud_id": "",
+  "ignition_id": "etcd3-proxy.yaml"
+}
--- a/examples/profiles/etcd3.json
+++ b/examples/profiles/etcd3.json
@@ -0,0 +1,15 @@
+{
+  "id": "etcd3",
+  "name": "etcd3",
+  "boot": {
+    "kernel": "/assets/coreos/1109.1.0/coreos_production_pxe.vmlinuz",
+    "initrd": ["/assets/coreos/1109.1.0/coreos_production_pxe_image.cpio.gz"],
+    "cmdline": {
+      "coreos.config.url": "http://bootcfg.foo:8080/ignition?uuid=${uuid}&mac=${net0/mac:hexhyp}",
+      "coreos.autologin": "",
+      "coreos.first_boot": ""
+    }
+  },
+  "cloud_id": "",
+  "ignition_id": "etcd3.yaml"
+}