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fix: keepalived weights and slave naming #977

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Nov 7, 2024
Merged

fix: keepalived weights and slave naming #977

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6b3e687
fix: keepalived weights
gseidel Oct 18, 2024
908c032
fix: renaming slave to backup
gseidel Oct 18, 2024
50da0bb
Small fix
svenja11 Nov 7, 2024
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18 changes: 9 additions & 9 deletions tutorials/configure-cloud-ha-keepalived/01.de.md
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Original file line number Diff line number Diff line change
Expand Up @@ -177,7 +177,7 @@ Die hier gezeigte Konfiguration entspricht einem Beispiel anhand eines HA Webser
vrrp_script chk_nginx {
script "/usr/bin/pgrep nginx"
interval 2
weight 101
weight -101
}

vrrp_instance VI_1 {
Expand All @@ -188,7 +188,7 @@ vrrp_instance VI_1 {
virtual_router_id 30
unicast_src_ip [master_private_IP]
unicast_peer {
[slave_private_IP]
[backup_private_IP]
}

authentication {
Expand All @@ -204,9 +204,9 @@ vrrp_instance VI_1 {
}
```

> **Hinweis:** Die umrandeten Werte `[]` sind durch eigene Angaben auszutauschen. Für `auth_pass` kann ein beliebiges Passwort gewählt werden. Für den Master und den Slave sollte aber dasselbe Passwort angegeben werden.
> **Hinweis:** Die umrandeten Werte `[]` sind durch eigene Angaben auszutauschen. Für `auth_pass` kann ein beliebiges Passwort gewählt werden. Für den Master und den Backup sollte aber dasselbe Passwort angegeben werden.

**Konfiguration auf dem Slave Server**
**Konfiguration auf dem Backup Server**

`/etc/keepalived/keepalived.conf`

Expand All @@ -218,11 +218,11 @@ vrrp_script chk_nginx {

vrrp_instance VI_1 {
interface [cloud_private_network_adapter]
state SLAVE
state BACKUP
priority 100

virtual_router_id 30
unicast_src_ip [slave_private_IP]
unicast_src_ip [backup_private_IP]
unicast_peer {
[master_private_IP]
}
Expand All @@ -240,7 +240,7 @@ vrrp_instance VI_1 {
}
```

> **Hinweis:** Die umrandeten Werte `[]` sind durch eigene Angaben auszutauschen. Für `auth_pass` kann ein beliebiges Passwort gewählt werden. Für den Master und den Slave sollte aber dasselbe Passwort angegeben werden.
> **Hinweis:** Die umrandeten Werte `[]` sind durch eigene Angaben auszutauschen. Für `auth_pass` kann ein beliebiges Passwort gewählt werden. Für den Master und den Backup sollte aber dasselbe Passwort angegeben werden.

**Inhalt der `failover.sh` auf beiden Servern**

Expand Down Expand Up @@ -284,9 +284,9 @@ Im Normalbetrieb übernimmt der Master Webserver alle Anfragen.

![](images/master.png)

Sobald dieser ausfällt gibt es ein Failover auf den Slave Webserver.
Sobald dieser ausfällt gibt es ein Failover auf den Backup Webserver.

![](images/slave.png)
![](images/backup.png)

Sobald der Master Webserver wieder erreichbar ist wird wieder auf diesen gewechselt.

Expand Down
18 changes: 9 additions & 9 deletions tutorials/configure-cloud-ha-keepalived/01.en.md
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Original file line number Diff line number Diff line change
Expand Up @@ -176,7 +176,7 @@ The configuration shown here corresponds to an example using an HA web server (n
vrrp_script chk_nginx {
script "/usr/bin/pgrep nginx"
interval 2
weight 101
weight -101
}

vrrp_instance VI_1 {
Expand All @@ -187,7 +187,7 @@ vrrp_instance VI_1 {
virtual_router_id 30
unicast_src_ip [master_private_IP]
unicast_peer {
[slave_private_IP]
[backup_private_IP]
}

authentication {
Expand All @@ -203,9 +203,9 @@ vrrp_instance VI_1 {
}
```

> **Note:** The outlined values `[]` are to be replaced by your own specifications. For `auth_pass`, you can pick any random password. However, make sure to use the same password for the master and the slave.
> **Note:** The outlined values `[]` are to be replaced by your own specifications. For `auth_pass`, you can pick any random password. However, make sure to use the same password for the master and the backup.

**Configuration file on the slave server**
**Configuration file on the backup server**

`/etc/keepalived/keepalived.conf`

Expand All @@ -217,11 +217,11 @@ vrrp_script chk_nginx {

vrrp_instance VI_1 {
interface [cloud_private_network_adapter]
state SLAVE
state BACKUP
priority 100

virtual_router_id 30
unicast_src_ip [slave_private_IP]
unicast_src_ip [backup_private_IP]
unicast_peer {
[master_private_IP]
}
Expand All @@ -239,7 +239,7 @@ vrrp_instance VI_1 {
}
```

> **Note:** The outlined values `[]` are to be replaced by your own specifications. For `auth_pass`, you can pick any random password. However, make sure to use the same password for the master and the slave.
> **Note:** The outlined values `[]` are to be replaced by your own specifications. For `auth_pass`, you can pick any random password. However, make sure to use the same password for the master and the backup.

**Contents of `failover.sh` on both servers**

Expand Down Expand Up @@ -283,9 +283,9 @@ In normal operation, the master web server handles all requests.

![](images/master.png)

As soon as this fails, there is a failover to the slave web server.
As soon as this fails, there is a failover to the backup web server.

![](images/slave.png)
![](images/backup.png)

As soon as the master web server is reachable again, it is switched back to.

Expand Down
0 ...gure-cloud-ha-keepalived/images/slave.png → ...ure-cloud-ha-keepalived/images/backup.png
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