#これはなに
「OpenStackクラウドインテグレーション オープンソースクラウドによるサービス構築入門」の実習をSoftLayerの無料ベアメタルで行う記録である。
第10章 Availability Zoneを活用した災害対策システム
第5章から第10章までの支援ファイルはこちら。まとめてgitでダウンロードできる。
https://github.com/josug-book1-materials/chapter05-10
第10章の支援ファイルはこちらである。
https://github.com/josug-book1-materials/chapter05-10/tree/master/10
10.1 作業と目的の流れ
別のAvailability Zoneを使って災害対策を行う。
現在のアーキテクチャーではdbsは分散するわけには行かないので、app、web、lbsを新しいAvailability Zone「az2」に立て、dbsサーババーはaz1のdbs01を使うマルチAvailability Zone体制にする。
次にaz1の全面障害を想定しaz1のdbs、app、web、lbsを削除する。
az2に新しいdbsを起動し、第9章のswift上のバックアップからデータを復元しサービスを再開する。swiftはAvailability Zoneに取得しないため、ボリュームバックアップもAvailability Zoneに依存しないで利用できる。
nova と cinder はAvailability Zoneに依存するため、利用可能なAvailability Zoneを表示することができる。
[root@step-server ~]# nova availability-zone-list
+------+-----------+
| Name | Status |
+------+-----------+
| az1 | available |
| az2 | available |
+------+-----------+
[root@step-server ~]# cinder availability-zone-list
+------+-----------+
| Name | Status |
+------+-----------+
| az1 | available |
| az2 | available |
+------+-----------+
10.2 データを持たないサーバーの構築
10.2.1 サーバーの起動
データを持たないapp、web、lbsを新しいAvailability Zone「az2」に立てる。作業内容はこちら。
userdataは、app、webには第6章で使ったuserdata_app.txtとuserdata_web.txtを、lbsには第7章で使ったuserdata_lbs.txtを利用する。
ネットワークのUUIDを取得する。
[root@step-server ~]# source openrc
[root@step-server ~]# function get_uuid () { cat - | grep " id " | awk '{print $4}'; }
[root@step-server ~]# export MY_DMZ_NET=`neutron net-show dmz-net | get_uuid`
[root@step-server ~]# export MY_APP_NET=`neutron net-show app-net | get_uuid`
[root@step-server ~]# export MY_DBS_NET=`neutron net-show dbs-net | get_uuid`
まずはappサーバー。「--availability-zone az2」が指定されているのが、これまでと違う。
[root@step-server ~]# nova boot --flavor standard.xsmall --image "centos-base" \
> --key-name key-for-internal --user-data userdata_app.txt \
> --security-groups sg-all-from-console,sg-all-from-app-net,sg-all-from-dbs-net \
> --availability-zone az2 \
> --nic net-id=${MY_DMZ_NET} --nic net-id=${MY_APP_NET} --nic net-id=${MY_DBS_NET} \
> az2-app01
+--------------------------------------+---------------------------------------------------------------+
| Property | Value |
+--------------------------------------+---------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | nova |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | keWZGv7xpSkV |
| config_drive | |
| created | 2015-03-29T00:13:46Z |
| flavor | standard.xsmall (100) |
| hostId | |
| id | 8802531e-eaad-4433-a4c2-925694b5a3ee |
| image | centos-base (098f948e-e80b-4b1a-8a46-f8d2dd57e149) |
| key_name | key-for-internal |
| metadata | {} |
| name | az2-app01 |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | sg-all-from-console, sg-all-from-app-net, sg-all-from-dbs-net |
| status | BUILD |
| tenant_id | 106e169743964758bcad1f06cc69c472 |
| updated | 2015-03-29T00:13:46Z |
| user_id | 98dd78b670884b64b879568215777c53 |
+--------------------------------------+---------------------------------------------------------------+
次に、webサーバー。「--availability-zone az2」に「--num-instances 2」で起動している。
[root@step-server ~]# nova boot --flavor standard.xsmall --image "centos-base" \
> --key-name key-for-internal --user-data userdata_web.txt \
> --security-groups sg-all-from-console,sg-web-from-internet,sg-all-from-app-net \
> --availability-zone az2 \
> --num-instances 2 \
> --nic net-id=${MY_DMZ_NET} --nic net-id=${MY_APP_NET} \
> az2-web
+--------------------------------------+----------------------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | nova |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | MJa6inVNWdmV |
| config_drive | |
| created | 2015-03-29T00:15:23Z |
| flavor | standard.xsmall (100) |
| hostId | |
| id | 14412db1-e687-4746-8072-cd26c3281cd5 |
| image | centos-base (098f948e-e80b-4b1a-8a46-f8d2dd57e149) |
| key_name | key-for-internal |
| metadata | {} |
| name | az2-web-14412db1-e687-4746-8072-cd26c3281cd5 |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | sg-all-from-console, sg-web-from-internet, sg-all-from-app-net |
| status | BUILD |
| tenant_id | 106e169743964758bcad1f06cc69c472 |
| updated | 2015-03-29T00:15:23Z |
| user_id | 98dd78b670884b64b879568215777c53 |
+--------------------------------------+----------------------------------------------------------------+
そしてlbs。これも「--availability-zone az2」。
[root@step-server ~]# nova boot --flavor standard.xsmall --image "centos-base" \
> --key-name key-for-internal --user-data userdata_lbs.txt \
> --security-groups sg-all-from-console,sg-web-from-internet \
> --availability-zone az2 \
> --nic net-id=${MY_DMZ_NET} \
> az2-lbs01
+--------------------------------------+----------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | nova |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | dknDPuv7uM8D |
| config_drive | |
| created | 2015-03-29T00:17:14Z |
| flavor | standard.xsmall (100) |
| hostId | |
| id | f5a32c35-bcb4-4187-86fa-d576ae6db45e |
| image | centos-base (098f948e-e80b-4b1a-8a46-f8d2dd57e149) |
| key_name | key-for-internal |
| metadata | {} |
| name | az2-lbs01 |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | sg-all-from-console, sg-web-from-internet |
| status | BUILD |
| tenant_id | 106e169743964758bcad1f06cc69c472 |
| updated | 2015-03-29T00:17:14Z |
| user_id | 98dd78b670884b64b879568215777c53 |
+--------------------------------------+----------------------------------------------------+
「az2-」で始まる4つのサーバーがこの項で起動したもの。
[root@step-server ~]# nova list --field name,networks
+--------------------------------------+----------------------------------------------+-----------------------------------------------------------------+
| ID | Name | Networks |
+--------------------------------------+----------------------------------------------+-----------------------------------------------------------------+
| 35d338e5-6e8a-4cee-9be1-9a37b431bf38 | app01 | dmz-net=192.168.0.3; app-net=172.16.10.3; dbs-net=172.16.20.1 |
| 8802531e-eaad-4433-a4c2-925694b5a3ee | az2-app01 | dmz-net=192.168.0.16; app-net=172.16.10.12; dbs-net=172.16.20.6 |
| f5a32c35-bcb4-4187-86fa-d576ae6db45e | az2-lbs01 | dmz-net=192.168.0.19 |
| 14412db1-e687-4746-8072-cd26c3281cd5 | az2-web-14412db1-e687-4746-8072-cd26c3281cd5 | dmz-net=192.168.0.18; app-net=172.16.10.14 |
| 1fb89f91-4f22-464d-82e2-d6bbe20b2642 | az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 | dmz-net=192.168.0.17; app-net=172.16.10.13 |
| edf1b599-de4f-4b2c-be90-17ab1252728f | dbs01 | dmz-net=192.168.0.4; dbs-net=172.16.20.3 |
| 37cbd237-9fd9-4f95-b4e3-caafeaf67454 | lbs01 | dmz-net=192.168.0.5, 192.168.100.133 |
| 65d3400d-3467-4563-9ff5-9c0e30c7157e | step-server | work-net=10.0.0.1, 192.168.100.131 |
| ca755522-3eb2-475a-8e37-7fe23398b1d9 | web01 | dmz-net=192.168.0.1; app-net=172.16.10.1 |
| d0ce0d2a-f4fa-448d-bb9b-b605af386b9f | web02 | dmz-net=192.168.0.6; app-net=172.16.10.4 |
| 5e8fb496-f248-42e4-a6d9-997fd6307402 | web03 | dmz-net=192.168.0.7; app-net=172.16.10.5 |
| 1955e438-626f-4582-8d15-bfe13b97a084 | web04 | dmz-net=192.168.0.8; app-net=172.16.10.6 |
+--------------------------------------+----------------------------------------------+-----------------------------------------------------------------+
10.2.2 アプリケーションの設定
az2-lbs01 → az2-web-(1,2) → az2-app01 → dbs01(az1)になるように設定をする。
まず、az2-app01。「dmz-net=192.168.0.16」にsshで接続。「dbs-net=172.16.20.3」のaz1にあるdbs01に接続するように設定。
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.16
[root@az2-app01 ~]# nano /root/sample-app/endpoint.conf
[root@az2-app01 ~]# cat /root/sample-app/endpoint.conf
[rest-server]
rest_host = 127.0.0.1
rest_endpoint = http://%(rest_host)s:5555/bbs
[db-server]
db_host = 172.16.20.3
db_endpoint = mysql://user:password@%(db_host)s/sample_bbs?charset=utf8
[root@az2-app01 ~]# sh /root/sample-app/server-setup/rest.init.sh start
Starting rest.py [ OK ]
[root@az2-app01 ~]# exit
logout
Connection to 192.168.0.16 closed.
次にaz2-web。「dmz-net=192.168.0.17」と「dmz-net=192.168.0.18」の2台に「app-net=172.16.10.12」のIPでaz2-app01に接続できるようにする。
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.17
[root@az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 ~]# nano /root/sample-app/endpoint.conf
[root@az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 ~]# cat /root/sample-app/endpoint.conf
[rest-server]
rest_host = 172.16.10.12
rest_endpoint = http://%(rest_host)s:5555/bbs
[db-server]
db_host = localhost
db_endpoint = mysql://user:password@%(db_host)s/sample_bbs?charset=utf8
[root@az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 ~]# sh /root/sample-app/server-setup/web.init.sh start
Starting web.py [ OK ]
[root@az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 ~]# exit
logout
Connection to 192.168.0.17 closed.
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.18
[root@az2-web-14412db1-e687-4746-8072-cd26c3281cd5 ~]# nano /root/sample-app/endpoint.conf
[root@az2-web-14412db1-e687-4746-8072-cd26c3281cd5 ~]# cat /root/sample-app/endpoint.conf
[rest-server]
rest_host = 172.16.10.12
rest_endpoint = http://%(rest_host)s:5555/bbs
[db-server]
db_host = localhost
db_endpoint = mysql://user:password@%(db_host)s/sample_bbs?charset=utf8
[root@az2-web-14412db1-e687-4746-8072-cd26c3281cd5 ~]# sh /root/sample-app/server-setup/web.init.sh start
Starting web.py [ OK ]
[root@az2-web-14412db1-e687-4746-8072-cd26c3281cd5 ~]# exit
logout
Connection to 192.168.0.18 closed.
「dmz-net=192.168.0.19」で起動したaz2-lbs01のnginxに「dmz-net=192.168.0.17」「dmz-net=192.168.0.18」でwebサーバーを登録する。
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.19
[root@az2-lbs01 ~]# nano /etc/nginx/conf.d/lbs.conf
[root@az2-lbs01 ~]# cat /etc/nginx/conf.d/lbs.conf
upstream web-server {
server 192.168.0.17:80;
server 192.168.0.18:80;
}
server {
listen 80 default_server;
server_name _;
location / {
proxy_pass http://web-server/;
}
}
[root@az2-lbs01 ~]# service nginx configtest
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@az2-lbs01 ~]# service nginx restart
Stopping nginx: [ OK ]
Starting nginx: [ OK ]
[root@az2-lbs01 ~]# exit
logout
Connection to 192.168.0.19 closed.
az2-lbs01にExt-NetのFloating Ipを払い出して付与する。
[root@step-server ~]# nova floating-ip-create Ext-Net
+-----------------+-----------+----------+---------+
| Ip | Server Id | Fixed Ip | Pool |
+-----------------+-----------+----------+---------+
| 192.168.100.134 | | - | Ext-Net |
+-----------------+-----------+----------+---------+
[root@step-server ~]# nova floating-ip-associate az2-lbs01 192.168.100.134
[root@step-server ~]# nova floating-ip-list
+-----------------+-----------+--------------+---------+
| Ip | Server Id | Fixed Ip | Pool |
+-----------------+-----------+--------------+---------+
| 192.168.100.131 | | 10.0.0.1 | Ext-Net |
| 192.168.100.134 | | 192.168.0.19 | Ext-Net |
| 192.168.100.133 | | 192.168.0.5 | Ext-Net |
+-----------------+-----------+--------------+---------+
192.168.100.134が付いた。でも、いつもの様に外部からはアクセスできない。
これまでWebサービスがたつ度にnginxでReverse Proxyを立ててきたが、考えてみればホストにForward Proxyをひとつ立てておけば、それでまかなえた。例えば、手順はこちら。8章のswiftからのイメージの取得も出来たはずである。
今回も、結局、Reverse Proxyにする。前回のをコピーし、接続先のIPと待ちうけポートを変更するだけですむし。
user01@test:~$ cat /etc/nginx/conf.d/az2.conf
server {
listen 2080;
server_name [Public IP];
location / {
auth_basic "Input ID/PASS";
auth_basic_user_file /etc/nginx/.htpasswd;
proxy_pass http://192.168.100.134/;
}
}
az2-lbs01にアクセスできることを確認する。
10.3 az1の障害を想定した切り替え
10.3.1 az1のサーバー停止
az1で稼動するsetp-server以外のサーバーを停止する。
[root@step-server ~]# nova list --field name,OS-EXT-AZ:availability_zone
+--------------------------------------+----------------------------------------------+------------------------------+
| ID | Name | OS-EXT-AZ: Availability Zone |
+--------------------------------------+----------------------------------------------+------------------------------+
| 35d338e5-6e8a-4cee-9be1-9a37b431bf38 | app01 | az1 |
| 8802531e-eaad-4433-a4c2-925694b5a3ee | az2-app01 | az2 |
| f5a32c35-bcb4-4187-86fa-d576ae6db45e | az2-lbs01 | az2 |
| 14412db1-e687-4746-8072-cd26c3281cd5 | az2-web-14412db1-e687-4746-8072-cd26c3281cd5 | az2 |
| 1fb89f91-4f22-464d-82e2-d6bbe20b2642 | az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 | az2 |
| edf1b599-de4f-4b2c-be90-17ab1252728f | dbs01 | az1 |
| 37cbd237-9fd9-4f95-b4e3-caafeaf67454 | lbs01 | az1 |
| 65d3400d-3467-4563-9ff5-9c0e30c7157e | step-server | az1 |
| ca755522-3eb2-475a-8e37-7fe23398b1d9 | web01 | az1 |
| d0ce0d2a-f4fa-448d-bb9b-b605af386b9f | web02 | az1 |
| 5e8fb496-f248-42e4-a6d9-997fd6307402 | web03 | az1 |
| 1955e438-626f-4582-8d15-bfe13b97a084 | web04 | az1 |
+--------------------------------------+----------------------------------------------+------------------------------+
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.3 shutdown -h now
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.4 shutdown -h now
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.5 shutdown -h now
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.1 shutdown -h now
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.6 shutdown -h now
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.7 shutdown -h now
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.8 shutdown -h now
az1のサーバーはSHUTOFFの状態になった。
[root@step-server ~]# nova list --field name,status
+--------------------------------------+----------------------------------------------+---------+
| ID | Name | Status |
+--------------------------------------+----------------------------------------------+---------+
| 35d338e5-6e8a-4cee-9be1-9a37b431bf38 | app01 | SHUTOFF |
| 8802531e-eaad-4433-a4c2-925694b5a3ee | az2-app01 | ACTIVE |
| f5a32c35-bcb4-4187-86fa-d576ae6db45e | az2-lbs01 | ACTIVE |
| 14412db1-e687-4746-8072-cd26c3281cd5 | az2-web-14412db1-e687-4746-8072-cd26c3281cd5 | ACTIVE |
| 1fb89f91-4f22-464d-82e2-d6bbe20b2642 | az2-web-1fb89f91-4f22-464d-82e2-d6bbe20b2642 | ACTIVE |
| edf1b599-de4f-4b2c-be90-17ab1252728f | dbs01 | SHUTOFF |
| 37cbd237-9fd9-4f95-b4e3-caafeaf67454 | lbs01 | SHUTOFF |
| 65d3400d-3467-4563-9ff5-9c0e30c7157e | step-server | ACTIVE |
| ca755522-3eb2-475a-8e37-7fe23398b1d9 | web01 | SHUTOFF |
| d0ce0d2a-f4fa-448d-bb9b-b605af386b9f | web02 | SHUTOFF |
| 5e8fb496-f248-42e4-a6d9-997fd6307402 | web03 | SHUTOFF |
| 1955e438-626f-4582-8d15-bfe13b97a084 | web04 | SHUTOFF |
+--------------------------------------+----------------------------------------------+---------+
10.3.2 SNSアプリケーションの復旧
ここでの手順はこちら。
第6章でaz1にdbs01を立てたuserdata_dbs.txtで、az2にaz2-dbs01を立てる。
[root@step-server ~]# nova boot --flavor standard.xsmall --image "centos-base" \
> --key-name key-for-internal --user-data userdata_dbs.txt \
> --security-groups sg-all-from-console,sg-all-from-dbs-net \
> --availability-zone az2 \
> --nic net-id=${MY_DMZ_NET} --nic net-id=${MY_DBS_NET} \
> az2-dbs01
+--------------------------------------+----------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | nova |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | 8YurPSQdxQV3 |
| config_drive | |
| created | 2015-03-29T01:59:40Z |
| flavor | standard.xsmall (100) |
| hostId | |
| id | 1610ebe2-7ca8-4d95-949a-c3d20017bb23 |
| image | centos-base (098f948e-e80b-4b1a-8a46-f8d2dd57e149) |
| key_name | key-for-internal |
| metadata | {} |
| name | az2-dbs01 |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | sg-all-from-console, sg-all-from-dbs-net |
| status | BUILD |
| tenant_id | 106e169743964758bcad1f06cc69c472 |
| updated | 2015-03-29T01:59:40Z |
| user_id | 98dd78b670884b64b879568215777c53 |
+--------------------------------------+----------------------------------------------------+
[root@step-server ~]# nova list --field name,networks --name az2-dbs01
+--------------------------------------+-----------+-------------------------------------------+
| ID | Name | Networks |
+--------------------------------------+-----------+-------------------------------------------+
| 1610ebe2-7ca8-4d95-949a-c3d20017bb23 | az2-dbs01 | dmz-net=192.168.0.21; dbs-net=172.16.20.7 |
+--------------------------------------+-----------+-------------------------------------------+
10GBのボリュームaz2_dbs_vol01を作成する。
[root@step-server ~]# cinder create --display-name az2_dbs_vol01 --availability-zone az2 10
+---------------------+--------------------------------------+
| Property | Value |
+---------------------+--------------------------------------+
| attachments | [] |
| availability_zone | az2 |
| bootable | false |
| created_at | 2015-03-29T02:01:26.509122 |
| display_description | None |
| display_name | az2_dbs_vol01 |
| encrypted | False |
| id | 4986af31-18a7-40cb-a4d5-d000d05ba3a1 |
| metadata | {} |
| size | 10 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| volume_type | None |
+---------------------+--------------------------------------+
[root@step-server ~]# cinder list --display-name az2_dbs_vol01
+--------------------------------------+-----------+---------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+---------------+------+-------------+----------+-------------+
| 4986af31-18a7-40cb-a4d5-d000d05ba3a1 | available | az2_dbs_vol01 | 10 | None | false | |
+--------------------------------------+-----------+---------------+------+-------------+----------+-------------+
[root@step-server ~]# export MY_AZ2_DBS_VOL01=`cinder show az2_dbs_vol01 | get_uuid`
[root@step-server ~]# echo $MY_AZ2_DBS_VOL01
4986af31-18a7-40cb-a4d5-d000d05ba3a1
既存のバックアップdbs_vol01_res-backup01をボリュームaz2_dbs_vol01にリストアする。
[root@step-server ~]# cinder backup-list
+--------------------------------------+--------------------------------------+-----------+------------------------+------+--------------+---------------+
| ID | Volume ID | Status | Name | Size | Object Count | Container |
+--------------------------------------+--------------------------------------+-----------+------------------------+------+--------------+---------------+
| e269e1a1-0faa-49d7-ae4b-c5afb7517cf8 | 6d9d3c53-0a1b-44e9-8b51-ce41f30cdd8e | available | dbs_vol01_res-backup01 | 10 | 206 | volumebackups |
+--------------------------------------+--------------------------------------+-----------+------------------------+------+--------------+---------------+
[root@step-server ~]# export MY_DBS_VOL01_RES_BK01=`cinder backup-list |grep dbs_vol01_res-backup01 | awk '{print $2}'`
[root@step-server ~]# echo $MY_DBS_VOL01_RES_BK01
e269e1a1-0faa-49d7-ae4b-c5afb7517cf8
[root@step-server ~]# cinder backup-restore --volume-id $MY_AZ2_DBS_VOL01 $MY_DBS_VOL01_RES_BK01
[root@step-server ~]# cinder list --display-name az2_dbs_vol01
+--------------------------------------+------------------+---------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+------------------+---------------+------+-------------+----------+-------------+
| 4986af31-18a7-40cb-a4d5-d000d05ba3a1 | restoring-backup | az2_dbs_vol01 | 10 | None | false | |
+--------------------------------------+------------------+---------------+------+-------------+----------+-------------+
restoring-backupのボリュームが無くなる。
[root@step-server ~]# cinder list --status restoring-backup
+----+--------+--------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+----+--------+--------------+------+-------------+----------+-------------+
+----+--------+--------------+------+-------------+----------+-------------+
az2_dbs_vol01という名前のボリュームも無くなりあわてる。
[root@step-server ~]# cinder list --display-name az2_dbs_vol01
+----+--------+--------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+----+--------+--------------+------+-------------+----------+-------------+
+----+--------+--------------+------+-------------+----------+-------------+
そうそう、リストアするとボリューム名がバックアップ時のものに戻る。
[root@step-server ~]# cinder list
+--------------------------------------+-----------+---------------+------+-------------+----------+--------------------------------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+---------------+------+-------------+----------+--------------------------------------+
| 4986af31-18a7-40cb-a4d5-d000d05ba3a1 | available | dbs_vol01_res | 10 | None | false | |
| 6d9d3c53-0a1b-44e9-8b51-ce41f30cdd8e | in-use | dbs_vol01_res | 10 | None | false | edf1b599-de4f-4b2c-be90-17ab1252728f |
+--------------------------------------+-----------+---------------+------+-------------+----------+--------------------------------------+
名前をaz2_dbs_vol01に戻し、az2-dbs01に接続する。
[root@step-server ~]# cinder rename $MY_AZ2_DBS_VOL01 az2_dbs_vol01
[root@step-server ~]# nova volume-attach az2-dbs01 $MY_AZ2_DBS_VOL01
+----------+--------------------------------------+
| Property | Value |
+----------+--------------------------------------+
| device | /dev/vdc |
| id | 4986af31-18a7-40cb-a4d5-d000d05ba3a1 |
| serverId | 1610ebe2-7ca8-4d95-949a-c3d20017bb23 |
| volumeId | 4986af31-18a7-40cb-a4d5-d000d05ba3a1 |
+----------+--------------------------------------+
az2-dbs01に入り、/var/lib/mysqlにマウントする。
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.21
[root@az2-dbs01 ~]# lsblk /dev/vdc
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vdc 252:32 0 10G 0 disk
└─vdc1 252:33 0 10G 0 part
[root@az2-dbs01 ~]# service mysqld stop
Stopping mysqld: [ OK ]
[root@az2-dbs01 ~]# mount LABEL=mysql_data /var/lib/mysql
[root@az2-dbs01 ~]# service mysqld start
Starting mysqld: [ OK ]
[root@az2-dbs01 ~]# exit
logout
Connection to 192.168.0.21 closed.
az2-app01に入りdb_hostをaz2-dbs01の「dbs-net=172.16.20.7」にする。
[root@step-server ~]# ssh -i key-for-internal.pem root@192.168.0.16
[root@az2-app01 ~]# nano /root/sample-app/endpoint.conf
[root@az2-app01 ~]# cat /root/sample-app/endpoint.conf
[rest-server]
rest_host = 127.0.0.1
rest_endpoint = http://%(rest_host)s:5555/bbs
[db-server]
db_host = 172.16.20.7
db_endpoint = mysql://user:password@%(db_host)s/sample_bbs?charset=utf8
[root@az2-app01 ~]# sh /root/sample-app/server-setup/rest.init.sh restart
Starting rest.py [ OK ]
[root@az2-app01 ~]# exit
logout
Connection to 192.168.0.16 closed.
az2-lbs01経由で接続できた。ただしデータはバックアップ取得時のものに戻っている。
第10章の完了。
第5章からここまでがOpenStackの基本機能でクラウドを構築する内容だった。
次章からは外部ツールとの組み合わせを学習するようだ。