Docker 404是指Docker在從倉庫拉取鏡像時出現(xiàn)的錯誤，表示無法找到請求的資源。這種錯誤通常會使Docker命令終止運行并返回錯誤代碼。

$ docker pull myimage:latest
latest: Pulling from library/myimage
2cbe745eeb39: Pull complete 
ba9a9af65f4e: Pull complete 
f4398e53a385: Pull complete 
7dab926e17a8: Pull complete 
5ce75f5e684b: Pull complete 
a3e1e69d3dbf: Pull complete 
958fd7e49967: Pull complete 
ed323f316ebb: Pull complete 
bf357aa99c0d: Pull complete 
de974e85aa9d: Pull complete 
f7fd0e59aeed: Pull complete 
94e308d1fc7f: Pull complete 
616d27b1262f: Pull complete 
eb1f64c8f6b1: Pull complete 
8356edb20f6e: Pull complete 
f140024efbcb: Pull complete 
81ab1e36b860: Pull complete 
97ccf861e5c0: Waiting 
5ce75f5e684b: Pushing [===>]  2.013MB/39.34MB
5ce75f5e684b: Pushing [===>]  2.013MB/39.34MB
5ce75f5e684b: Pushing [===>5ce75f5e684b: Retrying in 1 second
94e308d1fc7f: Layer already exists 
616d27b1262f: Layer already exists 
eb1f64c8f6b1: Layer already exists 
8356edb20f6e: Layer already exists 
f140024efbcb: Layer already exists 
81ab1e36b860: Layer already exists 
97ccf861e5c0: Retrying in 1 second
5ce75f5e684b: Retrying in 10 seconds
5ce75f5e684b: Retrying in 9 seconds
5ce75f5e684b: Retrying in 8 seconds
5ce75f5e684b: Retrying in 7 seconds
5ce75f5e684b: Retrying in 6 seconds
5ce75f5e684b: Retrying in 5 seconds
5ce75f5e684b: Retrying in 4 seconds
5ce75f5e684b: Retrying in 3 seconds
5ce75f5e684b: Retrying in 2 seconds
5ce75f5e684b: Retrying in 1 second

通常出現(xiàn)404錯誤的原因是鏡像不存在倉庫中，可能是鏡像名稱拼寫錯誤或倉庫不存在。在這種情況下，需要檢查倉庫和鏡像名稱是否拼寫正確，或者換一個可用的倉庫進行拉取操作。

此外，也有可能是網(wǎng)絡問題導致拉取失敗。此時，可以嘗試檢查網(wǎng)絡連接是否正?；蚴褂肰PN或代理來嘗試解決問題。

總之，遇到Docker 404錯誤時，要及時檢查鏡像名稱、倉庫是否正確以及網(wǎng)絡連接是否正常，才能及時解決問題。