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demo: Switch etcd to use metadata
Also add more services. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
Rolf Neugebauer
@@ -22,9 +22,7 @@ This should create a HyperKit based, InfraKit managed `etcd` cluster with 5 `etc
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Start InfraKit:
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```
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infrakit-flavor-vanilla &
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infrakit-group-default &
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../../../bin/infrakit-instance-hyperkit
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./start-infrakit
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```
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Note: The HyperKit InfraKit plugin must be started from the directory
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@@ -35,10 +33,10 @@ Now, commit the new config:
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infrakit group commit infrakit.json
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```
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To check if everything is fine, note down the IP address from one of
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the nodes and then:
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To check if everything is fine, we created (above) a local `etcd.local` docker image which already has the environment set up to contact the cluster:
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```
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docker run --rm -t quay.io/coreos/etcd:v3.1.5 etcdctl --endpoints http://192.168.65.200:2379 member list
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docker run --rm -ti etcd.local etcdctl member list
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docker run --rm -ti etcd.local etcdctl cluster-health
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```
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You can perform rolling updates, by for example, switching the kernel version in `etcd.yml`, build a new moby, e.g., `moby build -name etcd-4.10 etcd`, update `infrakit.json`, and then commit the new configuration to InfraKit: `infrakit group commit infrakit.json`.
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@@ -4,7 +4,9 @@
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set -x
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set -v
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DATADIR=/var/lib/etcd
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# Get initial cluster data from metadata
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NAME_PREFIX="$(cat /etc/etcd/name_prefix)"
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INIT_CLUSTER="$(cat /etc/etcd/init_cluster)"
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# Wait till we have an IP address
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IP=""
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@@ -13,13 +15,12 @@ while [ -z "$IP" ]; do
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sleep 1
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done
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# Name is infra+last octet of IP address
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NUM=$(echo ${IP} | cut -d . -f 4)
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PREFIX=$(echo ${IP} | cut -d . -f 1,2,3)
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NAME=infra${NUM}
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# Where to store data
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DATADIR=/var/lib/etcd
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# This should come from Metadata
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INIT_CLUSTER="infra200=http://${PREFIX}.200:2380,infra201=http://${PREFIX}.201:2380,infra202=http://${PREFIX}.202:2380,infra203=http://${PREFIX}.203:2380,infra204=http://${PREFIX}.204:2380"
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# Name is NAME_PREFIX+last octet of IP address
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NUM=$(echo ${IP} | cut -d . -f 4)
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NAME=${NAME_PREFIX}${NUM}
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# We currently have no easy way to determine if we join a cluster for
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# the first time or if we got restarted and need to join an existing
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@@ -31,13 +31,6 @@ onboot:
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- CAP_SYS_ADMIN
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rootfsPropagation: shared
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command: ["/mount.sh", "/var/lib/etcd"]
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services:
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- name: rngd
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image: "mobylinux/rngd:3dad6dd43270fa632ac031e99d1947f20b22eec9@sha256:1c93c1db7196f6f71f8e300bc1d15f0376dd18e8891c8789d77c8ff19f3a9a92"
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capabilities:
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- CAP_SYS_ADMIN
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oomScoreAdj: -800
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readonly: true
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- name: dhcpcd
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image: "mobylinux/dhcpcd:0d4012269cb142972fed8542fbdc3ff5a7b695cd"
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binds:
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@@ -48,7 +41,32 @@ services:
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- CAP_NET_BIND_SERVICE
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- CAP_NET_RAW
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net: host
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command: ["/sbin/dhcpcd", "--nobackground", "-f", "/dhcpcd.conf", "-1"]
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- name: metadata
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image: mobylinux/metadata:960e6c371c9a07cf512dfcfa9734a5e0db427e96
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net: host
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binds:
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- /dev:/dev
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- /var:/var
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- /etc/resolv.conf:/etc/resolv.conf
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capabilities:
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- all
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services:
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- name: rngd
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image: "mobylinux/rngd:3dad6dd43270fa632ac031e99d1947f20b22eec9"
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capabilities:
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- CAP_SYS_ADMIN
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oomScoreAdj: -800
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readonly: true
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- name: ntpd
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image: "mobylinux/openntpd:a570316d7fc49ca1daa29bd945499f4963d227af"
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capabilities:
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- CAP_SYS_TIME
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- CAP_SYS_NICE
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- CAP_SYS_CHROOT
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- CAP_SETUID
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- CAP_SETGID
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net: host
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- name: etcd
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image: "mobylinux/etcd"
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capabilities:
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@@ -61,10 +79,11 @@ services:
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net: host
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binds:
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- /var/lib/etcd:/var/lib/etcd
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- /var/config/etcd:/etc/etcd
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outputs:
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- format: kernel+initrd
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# - format: gcp
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# project: docker4x
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# bucket: rolf
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# replace: true
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- format: gcp
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project: docker4x
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bucket: rolf
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replace: true
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@@ -18,16 +18,31 @@
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"Network": "rneugeba-demo",
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"Connect" : true,
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"MachineType": "n1-standard-1",
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"DiskType": "pd-standard",
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"DiskSizeMb": 60,
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"DiskImage": "https://www.googleapis.com/compute/v1/projects/docker4x/global/images/etcd",
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"DiskType": "pd-standard",
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"AutoDeleteDisk": true,
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"ReuseExistingDisk": false,
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"Scopes": [ ]
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}
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},
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"Flavor": {
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"Plugin": "flavor-vanilla",
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"Properties": {
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"Init": [ ],
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"Init": [
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"{",
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" \"etcd\": {",
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" \"name_prefix\": {",
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" \"perm\": \"0644\",",
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" \"content\": \"server\"",
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"},",
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" \"init_cluster\": {",
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" \"perm\": \"0644\",",
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" \"content\": \"server200=http://10.132.0.200:2380,server201=http://10.132.0.201:2380,server202=http://10.132.0.202:2380,server203=http://10.132.0.203:2380,server204=http://10.132.0.204:2380\"",
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"}",
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"}",
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"}"
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],
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"Tags": {
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"tier": "etcd-cluster",
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"project": "infrakit"
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@@ -23,6 +23,18 @@
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"Plugin": "flavor-vanilla",
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"Properties": {
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"Init": [
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"{",
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" \"etcd\": {",
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" \"name_prefix\": {",
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" \"perm\": \"0644\",",
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" \"content\": \"server\"",
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"},",
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" \"init_cluster\": {",
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" \"perm\": \"0644\",",
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" \"content\": \"server200=http://192.168.65.200:2380,server201=http://192.168.65.201:2380,server202=http://192.168.65.202:2380,server203=http://192.168.65.203:2380,server204=http://192.168.65.204:2380\"",
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"}",
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"}",
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"}"
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],
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"Tags": {
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"tier": "etcd-cluster",
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