2026-11-15 09:05:34

divers/docker_install_01.md

@@ -0,0 +1,22 @@
+```bash
+sudo dnf config-manager --add-repo https://download.docker.com/linux/rhel/docker-ce.repo
+sudo dnf -y install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+
+systemctl --now enable docker
+systemctl status docker
+```
+
+
+Docker images go into `/var/lib/docker`. To move it on other file system, for example `/app/docker`:
+
+```bash
+systemctl stop docker
+systemctl status docker
+
+cd /var/lib/
+mv docker /app/
+ln -s /app/docker .
+
+systemctl start docker
+systemctl status docker
+``

divers/keepalived_on_docker_01.md

@@ -0,0 +1,94 @@
+
+## DNS enteries:
+```text
+ivera-db1              IN A    192.168.0.109
+ivera-db2              IN A    192.168.0.110
+ivera-db-vip           IN A    192.168.0.115
+```
+
+
+## Master node
+
+File `docker-compose.yml`:
+```yml
+services:
+  keepalived:
+    image: osixia/keepalived:latest
+    container_name: keepalived-master
+    restart: unless-stopped
+    network_mode: host
+    cap_add:
+      - NET_ADMIN
+      - NET_RAW
+      - NET_BROADCAST
+    volumes:
+      - ./keepalived.conf:/etc/keepalived/keepalived.conf:ro
+```
+
+File `keepalived.conf`:
+```text
+vrrp_instance VI_1 {
+    state MASTER
+    interface enp1s0
+    virtual_router_id 51
+    priority 100
+    advert_int 1
+    
+    unicast_src_ip 192.168.0.109    # Replace with Master node's actual IP
+    unicast_peer {
+        192.168.0.110               # Replace with Backup node's actual IP
+    }
+
+    authentication {
+        auth_type PASS
+        auth_pass secret
+    }
+    
+    virtual_ipaddress {
+        192.168.0.115/24           # The shared Virtual IP (VIP)
+    }
+}
+```
+
+## Backup node
+
+File `docker-compose.yml`:
+```yml
+services:
+  keepalived:
+    image: osixia/keepalived:latest
+    container_name: keepalived-backup
+    restart: unless-stopped
+    network_mode: host
+    cap_add:
+      - NET_ADMIN
+      - NET_RAW
+      - NET_BROADCAST
+    volumes:
+      - ./keepalived.conf:/etc/keepalived/keepalived.conf:ro
+```
+
+File `keepalived.conf`:
+```text
+vrrp_instance VI_1 {
+    state BACKUP
+    interface enp1s0
+    virtual_router_id 51
+    priority 90
+    advert_int 1
+    
+    unicast_src_ip 192.168.0.110    # Replace with Backup node's actual IP
+    unicast_peer {
+        192.168.0.109               # Replace with Master node's actual IP
+    }
+
+    authentication {
+        auth_type PASS
+        auth_pass secret
+    }
+    
+    virtual_ipaddress {
+        192.168.0.115/24           # The shared Virtual IP (VIP)
+    }
+}
+```

tiddlywiki/Docker notes.md

@@ -1,49 +0,0 @@
-Install Docker
---------------
-
-	dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
-	dnf install -y docker-ce --nobest
-
-	systemctl enable --now docker
-	systemctl status docker
-
-
-Docker is installed by default on `/var/lib/docker`. To move it on other file system, for example `/app/docker`:
-
-	systemctl stop docker
-
-	cd /var/lib/
-	mv docker /app/
-	ln -s /app/docker .
-
-	systemctl start docker
-	systemctl status docker
-
-Usefull commands
-----------------
-
-Alias to stop and remove all containers:
-
-	alias cclean='docker stop $(docker ps -a -q); docker rm $(docker ps -a -q)'
-    
-Truncate all container logs:
-
-   	truncate -s 0 $(docker inspect --format='{{.LogPath}}' $(docker ps -a -q))
-
-Save an image:
-
-	docker save sabnzbd/sabnzbd | pigz > /mnt/yavin4/tmp/sabnzbd.tar.gz
-
-Load an image:
-
-	gunzip -c /mnt/yavin4/tmp/sabnzbd.tar.gz | docker load
-
-Set auto start for all host containers:
-
-	docker update --restart unless-stopped $(docker ps -q)
-
-Run command in bash:
-
-	docker exec -it <container> bash
-    
-