Raúl Sánchez
GitHub
commit
1da0e96ea2
50
templates/keepalived/0/README.md
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50
templates/keepalived/0/README.md
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# Keepalived
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This catalog recipe enables unicast VRRP based failover for one or more floating IP Addresses. It's intended deployment is for use on a pair edge or ingress nodes where forward-facing load-balancers or other like services will be scheduled.
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### Form Fields
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* **Update Host Sysctl** - If `true` automatically sets the needed sysctl setting on the host.
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* **Host Label Name** - Host label key name used to schedule keepalived master and backup instances.
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* **Master Label** - The value of the keepalived host Label to signify the master instance.
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* **Backup Label** - The value of the keepalived host Label to signify the backup instance.
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* **Interface Name** - The host interface that keepalived will monitor and use for VRRP traffic.
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* **Virtual Router ID** - A unique number from 0 to 255 that should identify the VRRP group.
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* **Master IP** - The IP on the master host that the keepalived daemon should bind to.
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* **Backup IP** - The IP on the backup host that the keepalived daemon should bind to.
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* **Virtual IP** - Virtual IP to be created. Must be in ip notation: `<ipaddress>/<mask> dev <interface>`
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### Requirements
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The host must have the sysctl setting `net.ipv4.ip_nonlocal_bind=1` configured.
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### Usage
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This service is intended to be deployed to edge nodes with a `master` and `backup` deployed respectively. One or more Virtual IPs may then be bound to hosts. These hosts should have an additional label used for load-balancer scheduling e.g. `ingress=true`
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#### Adding an HA Load Balancer Service
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**Ensure your edge hosts have an additional host label before proceeding**
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1. From the Stack menu add a new `Load Balancer`.
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2. Set `Scale` to be `Always run one instance of this container on every host`.
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3. Add an appropriate `Name` and `Description`.
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4. In the `Port Rules` section, click `Show host IP address options.` This enables the Host IP Field.
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5. Update the `Port Rules` with the `Host IP` field set to your `Virtual IP` as defined in the keepalived config. Configure the rest of the fields as needed for your application.
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6. Click on the `Scheduling` tab and click on `Add Scheduling Rule`.
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7. Create a rule where "The host `must` have a `host label` of `<edge node host label>` = `<edge node host label value>`.
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8. Click Create.
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#### Adding additional Virtual IPs to the keepalived Service
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1. From the Stack menu expand the `keepalived` service.
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2. Select upgrade on the `keepalived-backup` service.
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3. Add a new Environment Variable called `KEEPALIVED_VIRTUAL_IPADDRESS_<number>`. Where `<number>` should be a unique value from 0-999. e.g. `KEEPALIVED_VIRTUAL_IPADDRESS_2`.
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4. Set the value to be a **QUOTED STRING** with an additional virtual IP following the standard ip format of `<ipaddress>/<mask> dev <interface>`. e.g. `10.255.33.102/24 dev eth0`.
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5. Press `Upgrade`.
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6. Repeat the same steps for the `keepalived-master` service.
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### Troubleshooting
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For further help see the main [arc-ts/keepalived git repo](https://github.com/arc-ts/keepalived)
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56
templates/keepalived/0/docker-compose.yml.tpl
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templates/keepalived/0/docker-compose.yml.tpl
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version: '2'
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services:
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keepalived-master:
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restart: always
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image: arcts/keepalived:1.1.0
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network_mode: host
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cap_add:
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- NET_ADMIN
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environment:
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KEEPALIVED_AUTOCONF: true
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KEEPALIVED_STATE: MASTER
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KEEPALIVED_INTERFACE: ${interface}
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KEEPALIVED_VIRTUAL_ROUTER_ID: ${router_id}
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KEEPALIVED_UNICAST_SRC_IP: ${master_ip}
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KEEPALIVED_UNICAST_PEER_0: ${backup_ip}
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KEEPALIVED_TRACK_INTERFACE_1: ${interface}
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KEEPALIVED_VIRTUAL_IPADDRESS_1: "\"${virtual_ip}\""
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labels:
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io.rancher.scheduler.affinity:host_label: ${host_label}=${master_label}
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{{- if eq .Values.update_sysctl "true" }}
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io.rancher.sidekicks: keepalived-sysctl
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{{- end}}
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keepalived-backup:
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restart: always
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image: arcts/keepalived:1.1.0
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network_mode: host
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cap_add:
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- NET_ADMIN
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environment:
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KEEPALIVED_AUTOCONF: true
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KEEPALIVED_STATE: BACKUP
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KEEPALIVED_INTERFACE: ${interface}
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KEEPALIVED_VIRTUAL_ROUTER_ID: ${router_id}
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KEEPALIVED_UNICAST_SRC_IP: ${backup_ip}
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KEEPALIVED_UNICAST_PEER_0: ${master_ip}
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KEEPALIVED_TRACK_INTERFACE_1: ${interface}
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KEEPALIVED_VIRTUAL_IPADDRESS_1: "\"${virtual_ip}\""
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labels:
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io.rancher.scheduler.affinity:host_label: ${host_label}=${backup_label}
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{{- if eq .Values.update_sysctl "true" }}
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io.rancher.sidekicks: keepalived-sysctl
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{{- end}}
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{{- if eq .Values.update_sysctl "true" }}
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keepalived-sysctl:
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image: rawmind/alpine-sysctl:0.1-1
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network_mode: none
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privileged: true
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environment:
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SYSCTL_KEY: net.ipv4.ip_nonlocal_bind
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SYSCTL_VALUE: 1
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labels:
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io.rancher.container.start_once: true
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{{- end}}
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63
templates/keepalived/0/rancher-compose.yml
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templates/keepalived/0/rancher-compose.yml
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.catalog:
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name: "keepalived"
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version: v1.0.1
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description: "Keepalived VRRP based HA service."
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minimum_rancher_version: v0.46.0
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uuid: keepalived-1
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questions:
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- variable: "update_sysctl"
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description: |
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Set true to update sysctl.
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WARN: If set to true, sysctl key net.ipv4.ip_nonlocal_bind will be set to 1.
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label: "Update Host Sysctl:"
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type: "enum"
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default: "false"
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options:
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- "true"
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- "false"
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required: true
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- variable: "host_label"
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description: "Host label key name used to schedule keepalived master and backup instances."
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label: "Host Label Name:"
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type: "string"
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default: "vrrp_role"
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required: true
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- variable: "master_label"
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description: "The value of the keepalived host Label to signify the master instance."
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label: "Master Label:"
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type: "string"
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default: "master"
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required: true
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- variable: "backup_label"
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description: "The value of the keepalived host Label to signify the backup instance."
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label: "Backup Label:"
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type: "string"
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default: "backup"
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required: true
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- variable: "interface"
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description: "The name of the host interface."
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label: "Interface Name:"
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type: "string"
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default: "eth0"
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required: true
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- variable: "router_id"
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description: "The virtual Router ID to assign to the VRRP Pair."
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label: "Virtual Router ID:"
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type: "int"
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default: "2"
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required: true
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- variable: "master_ip"
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description: "Host IP of master node"
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label: "Master IP:"
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type: "string"
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required: true
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- variable: "backup_ip"
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description: "Host IP of backup node"
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label: "Backup IP:"
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type: "string"
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required: true
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- variable: "virtual_ip"
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description: "Virtual IP to be created. MUST be in ip notation: <IPADDRESS>/<MASK> dev <INTERFACE>"
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label: "Virtual IP:"
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type: "string"
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required: true
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293
templates/keepalived/catalogIcon-keepalived.svg
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templates/keepalived/catalogIcon-keepalived.svg
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After Width: | Height: | Size: 10 KiB |
5
templates/keepalived/config.yml
Executable file
5
templates/keepalived/config.yml
Executable file
@ -0,0 +1,5 @@
|
|||||||
|
name: keepalived
|
||||||
|
description: |
|
||||||
|
Keepalived enables services to be deployed in HA with VRRP based failover across multiple hosts.
|
||||||
|
version: v1.0.1
|
||||||
|
category: Networking
|
||||||
Loading…
x
Reference in New Issue
Block a user